10.6 \u9009\u62e9\u4e00\u79cd\u8868\u7c7b\u578b<\/p>\n
\u7528MySQL\uff0c\u5f53\u524d(\u7248\u672c 3.23.5)\u4f60\u80fd\u4ece\u4e00\u4e2a\u901f\u5ea6\u89c2\u70b9\u57284\u53ef\u7528\u8868\u7684\u683c\u5f0f\u4e4b\u95f4\u9009\u62e9\u3002 <\/p>\n
\u9759\u6001MyISAM <\/p>\n
\u8fd9\u79cd\u683c\u5f0f\u662f\u6700\u7b80\u5355\u4e14\u6700\u5b89\u5168\u7684\u683c\u5f0f\uff0c\u5b83\u4e5f\u662f\u5728\u78c1\u76d8\u683c\u5f0f\u6700\u5feb\u7684\u3002\u901f\u5ea6\u6765\u81ea\u4e8e\u6570\u636e\u80fd\u5728\u78c1\u76d8\u4e0a\u88ab\u627e\u7684\u96be\u6613\u65b9\u5f0f\u3002\u5f53\u6240\u5b9a\u6709\u4e00\u4e2a\u7d22\u5f15\u548c\u9759\u6001\u683c\u5f0f\u7684\u4e1c\u897f\u65f6\uff0c\u5b83\u5f88\u7b80\u5355\uff0c\u53ea\u662f\u884c\u957f\u5ea6\u4e58\u4ee5\u884c\u6570\u91cf\u3002\u800c\u4e14\u5728\u626b\u63cf\u4e00\u5f20\u8868\u65f6\uff0c\u7528\u6bcf\u6b21\u78c1\u76d8\u8bfb\u53d6\u6765\u8bfb\u5165\u5e38\u6570\u4e2a\u8bb0\u5f55\u662f\u5f88\u5bb9\u6613\u7684\u3002\u5b89\u5168\u6027\u6765\u81ea\u4e8e\u5982\u679c\u5f53\u5199\u5165\u4e00\u4e2a\u9759\u6001MyISAM\u6587\u4ef6\u65f6\uff0c\u4f60\u7684\u8ba1\u7b97\u673a\u5d29\u6e83\uff0cmyisamchk\u80fd\u5f88\u5bb9\u6613\u6307\u51fa\u6bcf\u884c\u5728\u54ea\u513f\u5f00\u59cb\u548c\u7ed3\u675f\uff0c\u56e0\u6b64\u5b83\u901a\u5e38\u80fd\u56de\u6536\u6240\u6709\u8bb0\u5f55\uff0c\u9664\u4e86\u90e8\u5206\u88ab\u5199\u5165\u7684\u90a3\u4e2a\u3002\u6ce8\u610f\uff0c\u5728MySQL\u4e2d\uff0c\u6240\u6709\u7d22\u5f15\u603b\u80fd\u88ab\u91cd\u5efa\u3002 <\/p>\n
\u52a8\u6001MyISAM <\/p>\n
\u8fd9\u79cd\u683c\u5f0f\u6709\u70b9\u590d\u6742\uff0c\u56e0\u4e3a\u6bcf\u4e00\u884c\u5fc5\u987b\u6709\u4e00\u4e2a\u5934\u8bf4\u660e\u5b83\u6709\u591a\u957f\u3002\u5f53\u4e00\u4e2a\u8bb0\u5f55\u5728\u66f4\u6539\u65f6\u53d8\u957f\u65f6\uff0c\u5b83\u4e5f\u53ef\u4ee5\u5728\u591a\u4e8e\u4e00\u4e2a\u4f4d\u7f6e\u4e0a\u7ed3\u675f\u3002\u4f60\u80fd\u4f7f\u7528OPTIMIZE table\u6216myisamchk\u6574\u7406\u4e00\u5f20\u8868\u3002\u5982\u679c\u4f60\u5728\u540c\u4e00\u4e2a\u8868\u4e2d\u6709\u8c61\u67d0\u4e9bVARCHAR\u6216BLOB\u5217\u90a3\u6837\u5b58\u53d6\/\u6539\u53d8\u7684\u9759\u6001\u6570\u636e\uff0c\u5c06\u52a8\u6001\u5217\u79fb\u5165\u53e6\u5916\u4e00\u4e2a\u8868\u4ee5\u907f\u514d\u788e\u7247\u53ef\u80fd\u662f\u4e00\u4e2a\u597d\u4e3b\u610f\u3002 <\/p>\n
\u538b\u7f29MyISAM <\/p>\n
\u8fd9\u662f\u4e00\u4e2a\u53ea\u8bfb\u7c7b\u578b\uff0c\u7528\u53ef\u9009\u7684myisampack\u5de5\u5177\u751f\u6210\u3002 <\/p>\n
\u5185\u5b58(HEAP \u5806\uff09 <\/p>\n
\u8fd9\u79cd\u8868\u683c\u5f0f\u5bf9\u5c0f\u578b\/\u4e2d\u578b\u67e5\u627e\u8868\u5341\u5206\u6709\u7528\u3002\u5bf9\u62f7\u8d1d\/\u521b\u5efa\u4e00\u4e2a\u5e38\u7528\u7684\u67e5\u627e\u8868(\u7528\u8054\u7ed3)\u5230\u4e00\u4e2a(\u4e5f\u8bb8\u4e34\u65f6)HEAP\u8868\u6709\u53ef\u80fd\u52a0\u5feb\u591a\u4e2a\u8868\u8054\u7ed3\u3002\u5047\u5b9a\u6211\u4eec\u60f3\u8981\u505a\u4e0b\u5217\u8054\u7ed3\uff0c\u7528\u540c\u6837\u6570\u636e\u53ef\u80fd\u8981\u51e0\u500d\u65f6\u95f4\u3002 <\/p>\n
SELECT tab1.a, tab3.a FROM tab1, tab2, tab3
WHERE tab1.a = tab2.a and tab2.a = tab3.a and tab2.c != 0;<\/p>\n
\u4e3a\u4e86\u52a0\u901f\u5b83\uff0c\u6211\u4eec\u53ef\u7528tab2\u548ctab3\u7684\u8054\u7ed3\u521b\u5efa\u4e00\u5f20\u4e34\u65f6\u8868\uff0c\u56e0\u4e3a\u7528\u76f8\u540c\u5217( tab1.a )\u67e5\u627e\u3002\u8fd9\u91cc\u662f\u521b\u5efa\u8be5\u8868\u548c\u7ed3\u679c\u9009\u62e9\u7684\u547d\u4ee4\u3002 <\/p>\n
CREATE TEMPORARY TABLE test TYPE=HEAP
SELECT
tab2.a as a2, tab3.a as a3
FROM
tab2, tab3
WHERE
tab2.a = tab3.a and c = 0;
SELECT tab1.a, test.a3 from tab1, test where tab1.a = test.a1;
SELECT tab1.b, test.a3 from tab1, test where tab1.a = test.a1 and something;<\/p>\n
10.6.1 \u9759\u6001(\u5b9a\u957f)\u8868\u7684\u7279\u70b9
\u8fd9\u662f\u7f3a\u7701\u683c\u5f0f\u3002\u5b83\u7528\u5728\u8868\u4e0d\u5305\u542bVARCHAR\u3001BLOB\u6216TEXT\u5217\u65f6\u5019\u3002
\u6240\u6709\u7684CHAR\u3001NUMERIC\u548cDECIMAL\u5217\u5145\u586b\u5230\u5217\u5bbd\u5ea6\u3002
\u975e\u5e38\u5feb\u3002
\u5bb9\u6613\u7f13\u51b2\u3002
\u5bb9\u6613\u5728\u5d29\u6e83\u540e\u91cd\u5efa\uff0c\u56e0\u4e3a\u8bb0\u5f55\u4f4d\u4e8e\u56fa\u5b9a\u7684\u4f4d\u7f6e\u3002
\u4e0d\u5fc5\u88ab\u91cd\u65b0\u7ec4\u7ec7(\u7528myisamchk)\uff0c\u9664\u975e\u4e00\u4e2a\u5de8\u91cf\u7684\u8bb0\u5f55\u88ab\u5220\u9664\u5e76\u4e14\u4f60\u60f3\u8981\u5f52\u8fd8\u7a7a\u95f2\u78c1\u76d8\u7a7a\u95f4\u7ed9\u64cd\u4f5c\u7cfb\u7edf\u3002
\u901a\u5e38\u6bd4\u52a8\u6001\u8868\u9700\u8981\u66f4\u591a\u7684\u78c1\u76d8\u7a7a\u95f4\u3002
10.6.2 \u52a8\u6001\u8868\u7684\u7279\u70b9
\u5982\u679c\u8868\u5305\u542b\u4efb\u4f55VARCHAR\u3001BLOB\u6216TEXT\u5217\uff0c\u4f7f\u7528\u8be5\u683c\u5f0f\u3002
\u6240\u6709\u5b57\u7b26\u4e32\u5217\u662f\u52a8\u6001\u7684(\u9664\u4e86\u90a3\u4e9b\u957f\u5ea6\u4e0d\u52304\u7684\u5217)\u3002
\u6bcf\u4e2a\u8bb0\u5f55\u524d\u7f6e\u4e00\u4e2a\u4f4d\u56fe\uff0c\u5bf9\u5b57\u7b26\u4e32\u5217\u6307\u51fa\u54ea\u4e2a\u5217\u662f\u7a7a\u7684('')\uff0c\u6216\u5bf9\u6570\u5b57\u5217\u54ea\u4e2a\u662f\u96f6(\u8fd9\u4e0d\u540c\u4e8e\u5305\u542bNULL\u503c\u7684\u5217)\u3002\u5982\u679c\u5b57\u7b26\u4e32\u5217\u5728\u5220\u9664\u5c3e\u90e8\u7a7a\u767d\u540e\u6709\u96f6\u957f\u5ea6\uff0c\u6216\u6570\u5b57\u5217\u6709\u96f6\u503c\uff0c\u5b83\u5728\u4f4d\u56fe\u4e2d\u6807\u8bb0\u5e76\u4e14\u4e0d\u4fdd\u5b58\u5230\u78c1\u76d8\u4e0a\u3002\u975e\u7a7a\u5b57\u7b26\u4e32\u5b58\u50a8\u4e3a\u4e00\u4e2a\u957f\u5ea6\u5b57\u8282\u52a0\u5b57\u7b26\u4e32\u5185\u5bb9\u3002
\u901a\u5e38\u6bd4\u5b9a\u957f\u8868\u5360\u66f4\u591a\u7684\u78c1\u76d8\u7a7a\u95f4\u3002
\u6bcf\u4e2a\u8bb0\u5f55\u4ec5\u4f7f\u7528\u6240\u9700\u7684\u7a7a\u95f4\u3002\u5982\u679c\u4e00\u4e2a\u8bb0\u5f55\u53d8\u5f97\u66f4\u5927\uff0c\u5b83\u6309\u9700\u8981\u88ab\u5207\u5f00\u591a\u6bb5\uff0c\u8fd9\u5bfc\u81f4\u8bb0\u5f55\u788e\u7247\u3002
\u5982\u679c\u4f60\u4e0e\u8d85\u8fc7\u884c\u957f\u5ea6\u7684\u4fe1\u606f\u66f4\u65b0\u884c\uff0c\u884c\u5c06\u88ab\u5206\u6bb5\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e2d\uff0c\u4f60\u53ef\u80fd\u5fc5\u987b\u65f6\u65f6\u8fd0\u884cmyisamchk -r\u4ee5\u4f7f\u6027\u80fd\u66f4\u597d\u3002\u4f7f\u7528myisamchk -ei tbl_name\u505a\u4e00\u4e9b\u7edf\u8ba1\u3002
\u5728\u5d29\u6e83\u540e\u4e0d\u5bb9\u6613\u91cd\u5efa\uff0c\u56e0\u4e3a\u4e00\u4e2a\u8bb0\u5f55\u53ef\u4ee5\u662f\u5206\u5f88\u591a\u6bb5\u5e76\u4e14\u4e00\u4e2a\u8fde\u63a5(\u788e\u7247)\u53ef\u4ee5\u4e22\u5931\u3002
\u5bf9\u52a8\u6001\u5c3a\u5bf8\u8bb0\u5f55\u7684\u671f\u671b\u884c\u957f\u5ea6\u662f\uff1a
3
+ (number of columns + 7) \/ 8
+ (number of char columns)
+ packed size of numeric columns
+ length of strings
+ (number of NULL columns + 7) \/ 8<\/p>\n
\u5bf9\u6bcf\u4e2a\u8fde\u63a5\u67096\u4e2a\u5b57\u8282\u7684\u60e9\u7f5a\u3002\u65e0\u8bba\u4f55\u65f6\u66f4\u6539\u5f15\u8d77\u8bb0\u5f55\u7684\u589e\u5927\uff0c\u4e00\u4e2a\u52a8\u6001\u8bb0\u5f55\u88ab\u94fe\u63a5\u3002\u6bcf\u4e2a\u65b0\u94fe\u63a5\u5c06\u81f3\u5c11\u662f20\u4e2a\u5b57\u8282\uff0c\u56e0\u6b64\u4e0b\u4e00\u589e\u5927\u5c06\u53ef\u80fd\u5728\u540c\u4e00\u94fe\u8fde\u4e2d\u3002\u5982\u679c\u4e0d\u662f\uff0c\u5c06\u6709\u53e6\u5916\u4e00\u4e2a\u94fe\u63a5\u3002\u4f60\u53ef\u4ee5\u7528myisamchk -ed\u68c0\u67e5\u6709\u591a\u5c11\u94fe\u63a5\u3002\u6240\u6709\u7684\u94fe\u63a5\u53ef\u4ee5\u7528 myisamchk -r \u5220\u9664\u3002 <\/p>\n
10.6.3 \u538b\u7f29\u8868\u7684\u7279\u70b9
\u4e00\u5f20\u7528myisampack\u5b9e\u7528\u7a0b\u5e8f\u5236\u4f5c\u7684\u53ea\u8bfb\u8868\u3002\u6240\u6709\u5177\u6709MySQL\u6269\u5c55\u7535\u5b50\u90ae\u4ef6\u652f\u6301\u7684\u5ba2\u6237\u53ef\u4ee5\u4e3a\u5176\u5185\u90e8\u4f7f\u7528\u4fdd\u7559\u4e00\u4e2amyisampack\u62f7\u8d1d\u3002
\u89e3\u538b\u7f29\u4ee3\u7801\u5b58\u5728\u4e8e\u6240\u6709MySQL\u5206\u53d1\uff0c\u4ee5\u4fbf\u751a\u81f3\u6ca1\u6709myisampack\u7684\u5ba2\u6237\u80fd\u8bfb\u53d6\u7528myisampack\u538b\u7f29\u7684\u8868\u3002
\u5360\u636e\u5f88\u5c0f\u7684\u78c1\u76d8\u7a7a\u95f4\uff0c\u4f7f\u78c1\u76d8\u4f7f\u7528\u91cf\u51cf\u5230\u6700\u5c0f\u3002
\u6bcf\u4e2a\u8bb0\u5f55\u88ab\u5355\u72ec\u538b\u7f29(\u5f88\u5c0f\u7684\u5b58\u53d6\u5f00\u9500)\u3002\u5bf9\u4e00\u4e2a\u8bb0\u5f55\u7684\u5934\u662f\u5b9a\u957f\u7684(1-3 \u5b57\u8282)\uff0c\u53d6\u51b3\u4e8e\u8868\u4e2d\u6700\u5927\u7684\u8bb0\u5f55\u3002\u6bcf\u5217\u4ee5\u4e0d\u540c\u65b9\u5f0f\u88ab\u538b\u7f29\u3002\u4e00\u4e9b\u538b\u7f29\u7c7b\u578b\u662f\uff1a
\u901a\u5e38\u5bf9\u6bcf\u5217\u6709\u4e00\u5f20\u4e0d\u540c\u7684\u54c8\u592b\u66fc\u8868\u3002
\u540e\u7f00\u7a7a\u767d\u538b\u7f29\u3002
\u524d\u7f00\u7a7a\u767d\u538b\u7f29\u3002
\u7528\u503c0\u7684\u6570\u5b57\u4f7f\u75281\u4f4d\u5b58\u50a8\u3002
\u5982\u679c\u6574\u6570\u5217\u7684\u503c\u6709\u4e00\u4e2a\u5c0f\u8303\u56f4\uff0c\u5217\u4f7f\u7528\u6700\u5c0f\u7684\u53ef\u80fd\u7c7b\u578b\u6765\u5b58\u50a8\u3002\u4f8b\u5982\uff0c\u5982\u679c\u6240\u6709\u7684\u503c\u57280\u5230255\u7684\u8303\u56f4\uff0c\u4e00\u4e2aBIGINT\u5217(8\u4e2a\u5b57\u8282)\u53ef\u4ee5\u4f5c\u4e3a\u4e00\u4e2aTINYINT\u5217(1\u5b57\u8282)\u5b58\u50a8\u3002
\u5982\u679c\u5217\u4ec5\u6709\u53ef\u80fd\u503c\u7684\u4e00\u4e2a\u5c0f\u96c6\u5408\uff0c\u5217\u7c7b\u578b\u88ab\u53d8\u6362\u5230ENUM\u3002
\u5217\u53ef\u4ee5\u4f7f\u7528\u4e0a\u9762\u7684\u538b\u7f29\u65b9\u6cd5\u7684\u7ec4\u5408\u3002
\u80fd\u5904\u7406\u5b9a\u957f\u6216\u52a8\u6001\u957f\u5ea6\u7684\u8bb0\u5f55\uff0c\u7136\u800c\u4e0d\u80fd\u5904\u7406BLOB\u6216TEXT\u5217\u3002
\u80fd\u7528myisamchk\u89e3\u538b\u7f29\u3002
MySQL\u80fd\u652f\u6301\u4e0d\u540c\u7684\u7d22\u5f15\u7c7b\u578b\uff0c\u4f46\u662f\u4e00\u822c\u7684\u7c7b\u578b\u662fISAM\u3002\u8fd9\u662f\u4e00\u4e2aB\u6811\u7d22\u5f15\u5e76\u4e14\u4f60\u80fd\u7c97\u7565\u5730\u4e3a\u7d22\u5f15\u6587\u4ef6\u8ba1\u7b97\u5927\u5c0f\u4e3a(key_length+4)*0.67\uff0c\u5728\u6240\u6709\u7684\u952e\u4e0a\u7684\u603b\u548c\u3002\uff08\u8fd9\u662f\u5bf9\u6700\u574f\u60c5\u51b5\uff0c\u5f53\u6240\u6709\u952e\u4ee5\u6392\u5e8f\u987a\u5e8f\u88ab\u63d2\u5165\u65f6\u3002\uff09<\/p>\n
\u5b57\u7b26\u4e32\u7d22\u5f15\u662f\u7a7a\u767d\u538b\u7f29\u7684\u3002\u5982\u679c\u7b2c\u4e00\u4e2a\u7d22\u5f15\u90e8\u5206\u662f\u4e00\u4e2a\u5b57\u7b26\u4e32\uff0c\u5b83\u4e5f\u5c06\u538b\u7f29\u524d\u7f00\u3002\u5982\u679c\u5b57\u7b26\u4e32\u5217\u6709\u5f88\u591a\u5c3e\u90e8\u7a7a\u767d\u6216\u662f\u4e00\u4e2a\u603b\u4e0d\u80fd\u7528\u5230\u5168\u957f\u7684VARCHAR\u5217\uff0c\u7a7a\u767d\u538b\u7f29\u4f7f\u7d22\u5f15\u6587\u4ef6\u66f4\u5c0f\u3002\u5982\u679c\u5f88\u591a\u5b57\u7b26\u4e32\u6709\u76f8\u540c\u7684\u524d\u7f00\uff0c\u524d\u7f00\u538b\u7f29\u662f\u6709\u5e2e\u52a9\u7684\u3002<\/p>\n
10.6.4 \u5185\u5b58\u8868\u7684\u7279\u70b9
\u5806\u684c\u5b50\u4ec5\u5b58\u5728\u4e8e\u5185\u5b58\u4e2d\uff0c\u56e0\u6b64\u5982\u679cmysqld\u88ab\u5173\u6389\u6216\u5d29\u6e83\uff0c\u5b83\u4eec\u5c06\u4e22\u5931\uff0c\u4f46\u662f\u56e0\u4e3a\u5b83\u4eec\u662f\u5f88\u5feb\uff0c\u4e0d\u7ba1\u600e\u6837\u5b83\u4eec\u662f\u6709\u7528\u7684\u3002<\/p>\n
MySQL\u5185\u90e8\u7684HEAP\u8868\u4f7f\u7528\u6ca1\u6709\u6ea2\u51fa\u533a\u7684100%\u52a8\u6001\u54c8\u5e0c\u5e76\u4e14\u6ca1\u6709\u4e0e\u5220\u9664\u6709\u5173\u7684\u95ee\u9898\u3002<\/p>\n
\u4f60\u53ea\u80fd\u901a\u8fc7\u4f7f\u7528\u5728\u5806\u8868\u4e2d\u7684\u4e00\u4e2a\u7d22\u5f15\u7684\u7528\u7b49\u5f0f\u5b58\u53d6\u4e1c\u897f(\u901a\u5e38\u7528=\u64cd\u4f5c\u7b26)\u3002<\/p>\n
\u5806\u8868\u7684\u7f3a\u70b9\u662f\uff1a <\/p>\n
\u4f60\u8981\u4e3a\u4f60\u60f3\u8981\u540c\u65f6\u4f7f\u7528\u7684\u6240\u6709\u5806\u8868\u9700\u8981\u8db3\u591f\u7684\u989d\u5916\u5185\u5b58\u3002
\u4f60\u4e0d\u80fd\u5728\u7d22\u5f15\u7684\u4e00\u4e2a\u90e8\u5206\u4e0a\u641c\u7d22\u3002
\u4f60\u4e0d\u80fd\u987a\u5e8f\u641c\u7d22\u4e0b\u4e00\u4e2a\u6761\u76ee(\u5373\u4f7f\u7528\u8fd9\u4e2a\u7d22\u5f15\u505a\u4e00\u4e2aORDER BY)\u3002
MySQL\u4e5f\u4e0d\u80fd\u7b97\u51fa\u57282\u4e2a\u503c\u4e4b\u95f4\u5927\u6982\u6709\u591a\u5c11\u884c\u3002\u8fd9\u88ab\u4f18\u5316\u5668\u4f7f\u7528\u6765\u51b3\u5b9a\u4f7f\u7528\u54ea\u4e2a\u7d22\u5f15\uff0c\u4f46\u662f\u5728\u53e6\u4e00\u65b9\u9762\u751a\u81f3\u4e0d\u9700\u8981\u78c1\u76d8\u5bfb\u9053\u3002
10.7 \u5176\u4ed6\u4f18\u5316\u6280\u5de7
\u5bf9\u52a0\u5feb\u7cfb\u7edf\u7684\u672a\u5206\u7c7b\u7684\u5efa\u8bae\u662f\uff1a <\/p>\n
\u4f7f\u7528\u6301\u4e45\u7684\u8fde\u63a5\u6570\u636e\u5e93\u4ee5\u907f\u514d\u8fde\u63a5\u5f00\u9500\u3002
\u603b\u662f\u68c0\u67e5\u4f60\u7684\u6240\u6709\u8be2\u95ee\u786e\u5b9e\u4f7f\u7528\u4f60\u5df2\u5728\u8868\u4e2d\u521b\u5efa\u4e86\u7684\u7d22\u5f15\u3002\u5728MySQL\u4e2d\uff0c\u4f60\u53ef\u4ee5\u7528EXPLAIN\u547d\u4ee4\u505a\u5230\u3002\u89c17.22 EXPLAIN\u53e5\u6cd5(\u5f97\u5230\u5173\u4e8eSELECT\u7684\u4fe1\u606f)\u3002
\u5c1d\u8bd5\u907f\u514d\u5728\u88ab\u66f4\u6539\u4e86\u5f88\u591a\u7684\u8868\u4e0a\u7684\u590d\u6742\u7684SELECT\u67e5\u8be2\u3002\u8fd9\u907f\u514d\u4e0e\u9501\u5b9a\u8868\u6709\u5173\u7684\u95ee\u9898\u3002
\u5728\u4e00\u4e9b\u60c5\u51b5\u4e0b\uff0c\u4f7f\u5f97\u57fa\u4e8e\u6765\u81ea\u5176\u4ed6\u8868\u7684\u5217\u7684\u4fe1\u606f\u5f15\u5165\u4e00\u4e2a\u201c \u54c8\u5e0c\u201d\u7684\u5217\u6709\u610f\u4e49\u3002\u5982\u679c\u8be5\u5217\u8f83\u77ed\u5e76\u4e14\u6709\u5408\u7406\u7684\u552f\u4e00\u503c\uff0c\u5b83\u53ef\u4ee5\u6bd4\u5728\u8bb8\u591a\u5217\u4e0a\u7684\u4e00\u4e2a\u5927\u7d22\u5f15\u5feb\u4e9b\u3002\u5728MySQL\u4e2d\uff0c\u5f88\u5bb9\u6613\u4f7f\u7528\u8fd9\u4e2a\u989d\u5916\u5217\uff1aSELECT * from table where hash='calculated hash on col1 and col2' and col_1='constant' and col_2='constant' and .. \u3002
\u5bf9\u4e8e\u6709\u5f88\u591a\u66f4\u6539\u7684\u8868\uff0c\u4f60\u5e94\u8be5\u8bd5\u7740\u907f\u514d\u6240\u6709VARCHAR\u6216BLOB\u5217\u3002\u53ea\u8981\u4f60\u4f7f\u7528\u5355\u4e2aVARCHAR\u6216BLOB\u5217\uff0c\u4f60\u5c06\u5f97\u5230\u52a8\u6001\u884c\u957f\u5ea6\u3002\u89c19.4 MySQL\u8868\u7c7b\u578b\u3002
\u53ea\u662f\u56e0\u4e3a\u884c\u592a\u5927\uff0c\u5206\u5272\u4e00\u5f20\u8868\u4e3a\u4e0d\u540c\u7684\u8868\u4e00\u822c\u6ca1\u6709\u4ec0\u4e48\u7528\u5904\u3002\u4e3a\u4e86\u5b58\u53d6\u884c\uff0c\u6700\u5927\u7684\u6027\u80fd\u547d\u51b2\u51fb\u78c1\u76d8\u5bfb\u9053\u4ee5\u627e\u5230\u884c\u7684\u7b2c\u4e00\u4e2a\u5b57\u8282\u3002\u5728\u627e\u5230\u6570\u636e\u540e\uff0c\u5927\u591a\u6570\u65b0\u578b\u78c1\u76d8\u5bf9\u5927\u591a\u6570\u5e94\u7528\u7a0b\u5e8f\u6765\u8bf4\u8db3\u591f\u5feb\uff0c\u80fd\u8bfb\u5165\u6574\u4e2a\u884c\u3002\u5b83\u786e\u5b9e\u6709\u5fc5\u8981\u5206\u5272\u7684\u552f\u4e00\u60c5\u5f62\u662f\u5982\u679c\u5176\u52a8\u6001\u884c\u5c3a\u5bf8\u7684\u8868(\u89c1\u4e0a\u8ff0)\u80fd\u53d8\u4e3a\u56fa\u5b9a\u7684\u884c\u5927\u5c0f\uff0c\u6216\u5982\u679c\u4f60\u5f88\u9891\u7e41\u5730\u9700\u8981\u626b\u63cf\u8868\u683c\u800c\u4e0d\u9700\u8981\u5927\u591a\u6570\u5217\u3002\u89c19.4 MySQL\u8868\u7c7b\u578b\u3002
\u5982\u679c\u4f60\u5f88\u7ecf\u5e38\u5730\u9700\u8981\u57fa\u4e8e\u6765\u81ea\u5f88\u591a\u884c\u7684\u4fe1\u606f\u8ba1\u7b97(\u5982\u8ba1\u6570)\uff0c\u5f15\u5165\u4e00\u4e2a\u65b0\u8868\u5e76\u5b9e\u65f6\u66f4\u65b0\u8ba1\u6570\u5668\u53ef\u80fd\u66f4\u597d\u4e00\u4e9b\u3002\u7c7b\u578b\u7684\u66f4\u6539UPDATE table set count=count+1 where index_column=constant\u662f\u5f88\u5feb\u7684\uff01\u5f53\u4f60\u4f7f\u7528\u8c61MySQL\u90a3\u6837\u7684\u53ea\u6709\u8868\u7ea7\u9501\u5b9a(\u591a\u91cd\u8bfb\/\u5355\u4e2a\u5199)\u7684\u6570\u636e\u5e93\u65f6\uff0c\u8fd9\u786e\u5b9e\u91cd\u8981\u3002\u8fd9\u4e5f\u5c06\u7ed9\u51fa\u5927\u591a\u6570\u6570\u636e\u5e93\u8f83\u597d\u7684\u6027\u80fd\uff0c\u56e0\u4e3a\u9501\u5b9a\u7ba1\u7406\u5668\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\u6709\u8f83\u5c11\u7684\u4e8b\u60c5\u8981\u505a\u3002 11111111111111111111111
\u5982\u679c\u4f60\u9700\u8981\u4ece\u5927\u7684\u8bb0\u5f55\u6587\u4ef6\u8868\u4e2d\u6536\u96c6\u7edf\u8ba1\u4fe1\u606f\uff0c\u4f7f\u7528\u603b\u7ed3\u6027\u7684\u8868\u800c\u4e0d\u662f\u626b\u63cf\u6574\u4e2a\u8868\u3002\u7ef4\u62a4\u603b\u7ed3\u5e94\u8be5\u6bd4\u5c1d\u8bd5\u505a\u201c\u5b9e\u65f6\u201d\u7edf\u8ba1\u8981\u5feb\u4e9b\u3002\u5f53\u6709\u53d8\u5316\u800c\u4e0d\u662f\u5fc5\u987b\u6539\u53d8\u8fd0\u884c\u7684\u5e94\u7528\u65f6\uff0c\u4ece\u8bb0\u5f55\u6587\u4ef6\u91cd\u65b0\u751f\u6210\u65b0\u7684\u603b\u7ed3\u8868(\u53d6\u51b3\u4e8e\u4e1a\u52a1\u51b3\u7b56)\u8981\u5feb\u591a\u4e86\uff01
\u5982\u679c\u53ef\u80fd\uff0c\u5e94\u8be5\u5c06\u62a5\u544a\u5206\u7c7b\u4e3a\u201c\u5b9e\u65f6\u201d\u6216\u201c\u7edf\u8ba1\u201d\uff0c\u8fd9\u91cc\u7edf\u8ba1\u62a5\u544a\u6240\u9700\u7684\u6570\u636e\u4ec5\u4ec5\u57fa\u4e8e\u4ece\u5b9e\u9645\u6570\u636e\u4ea7\u751f\u7684\u603b\u7ed3\u8868\u4e2d\u4ea7\u751f\u3002
\u5145\u5206\u5229\u7528\u5217\u6709\u7f3a\u7701\u503c\u7684\u4e8b\u5b9e\u3002\u5f53\u88ab\u63d2\u5165\u503c\u4e0d\u540c\u4e8e\u7f3a\u7701\u503c\u65f6\uff0c\u53ea\u662f\u660e\u786e\u5730\u63d2\u5165\u503c\u3002\u8fd9\u51cf\u5c11MySQL\u9700\u8981\u505a\u7684\u8bed\u6cd5\u5206\u6790\u5e76\u4e14\u6539\u8fdb\u63d2\u5165\u901f\u5ea6\u3002
\u5728\u4e00\u4e9b\u60c5\u51b5\u4e0b\uff0c\u5305\u88c5\u5e76\u5b58\u50a8\u6570\u636e\u5230\u4e00\u4e2aBLOB\u4e2d\u662f\u5f88\u65b9\u4fbf\u7684\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u4f60\u5fc5\u987b\u5728\u4f60\u7684\u5e94\u7528\u4e2d\u589e\u52a0\u989d\u5916\u7684\u4ee3\u7801\u6765\u6253\u5305\/\u89e3\u5305BLOB\u4e2d\u7684\u4e1c\u897f\uff0c\u4f46\u662f\u8fd9\u79cd\u65b9\u6cd5\u53ef\u4ee5\u5728\u67d0\u4e9b\u9636\u6bb5\u8282\u7701\u5f88\u591a\u5b58\u53d6\u3002\u5f53\u4f60\u6709\u4e0d\u7b26\u5408\u9759\u6001\u7684\u8868\u7ed3\u6784\u7684\u6570\u636e\u65f6\uff0c\u8fd9\u5f88\u5b9e\u7528\u3002
\u5728\u4e00\u822c\u60c5\u51b5\u4e0b\uff0c\u4f60\u5e94\u8be5\u5c1d\u8bd5\u4ee5\u7b2c\u4e09\u8303\u5f0f\u4fdd\u5b58\u6570\u636e\uff0c\u4f46\u662f\u5982\u679c\u4f60\u9700\u8981\u8fd9\u4e9b\u4ee5\u83b7\u5f97\u66f4\u5feb\u7684\u901f\u5ea6\uff0c\u4f60\u5e94\u8be5\u4e0d\u7528\u62c5\u5fc3\u91cd\u590d\u6216\u521b\u5efa\u603b\u7ed3\u8868\u3002
\u5b58\u50a8\u8fc7\u7a0b\u6216UDF(\u7528\u6237\u5b9a\u4e49\u51fd\u6570)\u53ef\u80fd\u662f\u83b7\u5f97\u66f4\u597d\u6027\u80fd\u7684\u4e00\u4e2a\u597d\u65b9\u6cd5\uff0c\u7136\u800c\u5982\u679c\u4f60\u4f7f\u7528\u67d0\u4e9b\u4e0d\u652f\u6301\u5b83\u7684\u6570\u636e\u5e93\uff0c\u5728\u8fd9\u79cd\u60c5\u51b5\u4e2d\uff0c\u4f60\u5e94\u8be5\u603b\u662f\u6709\u96f6\u4e00\u4e2a\u65b9\u6cd5(\u8f83\u6162\u7684)\u505a\u8fd9\u4e9b\u3002
\u4f60\u603b\u662f\u80fd\u901a\u8fc7\u5728\u4f60\u7684\u5e94\u7528\u7a0b\u5e8f\u4e2d\u7f13\u51b2\u67e5\u8be2\/\u7b54\u6848\u5e76\u5c1d\u8bd5\u540c\u65f6\u505a\u5f88\u591a\u63d2\u5165\/\u66f4\u65b0\u6765\u83b7\u5f97\u4e00\u4e9b\u597d\u5904\u3002\u5982\u679c\u4f60\u7684\u6570\u636e\u5e93\u652f\u6301\u9501\u5b9a\u8868(\u8c61MySQL\u548cOracle)\uff0c\u8fd9\u5e94\u8be5\u6709\u52a9\u4e8e\u786e\u4fdd\u7d22\u5f15\u7f13\u51b2\u5728\u6240\u6709\u66f4\u65b0\u540e\u53ea\u6e05\u7a7a\u4e00\u6b21\u3002
\u4f46\u4f60\u4e0d\u77e5\u9053\u4f55\u65f6\u5199\u5165\u4f60\u7684\u6570\u636e\u65f6\uff0c\u4f7f\u7528INSERT \/*! DELAYED *\/\u3002\u8fd9\u52a0\u5feb\u5904\u7406\uff0c\u56e0\u4e3a\u5f88\u591a\u8bb0\u5f55\u53ef\u4ee5\u7528\u4e00\u6b21\u78c1\u76d8\u5199\u5165\u88ab\u5199\u5165\u3002
\u5f53\u4f60\u60f3\u8981\u8ba9\u4f60\u7684\u9009\u62e9\u663e\u5f97\u66f4\u91cd\u8981\u65f6\uff0c\u4f7f\u7528INSERT \/*! LOW_PRIORITY *\/\u3002
\u4f7f\u7528SELECT \/*! HIGH_PRIORITY *\/\u6765\u53d6\u5f97\u585e\u5165\u961f\u5217\u7684\u9009\u62e9\uff0c\u5b83\u662f\u5373\u4f7f\u6709\u4eba\u7b49\u5f85\u505a\u4e00\u4e2a\u5199\u5165\u4e5f\u8981\u5b8c\u6210\u7684\u9009\u62e9\u3002
\u4f7f\u7528\u591a\u884cINSERT\u8bed\u53e5\u6765\u5b58\u50a8\u5f88\u591a\u6709\u4e00\u6761SQL\u547d\u4ee4\u7684\u884c(\u8bb8\u591aSQL\u670d\u52a1\u5668\u652f\u6301\u5b83\uff09\u3002
\u4f7f\u7528LOAD DATA INFILE\u88c5\u8f7d\u8f83\u5927\u6570\u91cf\u7684\u6570\u636e\u3002\u8fd9\u6bd4\u4e00\u822c\u7684\u63d2\u5165\u5feb\u5e76\u4e14\u5f53myisamchk\u96c6\u6210\u5728mysqld\u4e2d\u65f6\uff0c\u751a\u81f3\u5c06\u66f4\u5feb\u3002
\u4f7f\u7528AUTO_INCREMENT\u5217\u6784\u6210\u552f\u4e00\u503c\u3002
\u5f53\u4f7f\u7528\u52a8\u6001\u8868\u683c\u5f0f\u65f6\uff0c\u5076\u5c14\u4f7f\u7528OPTIMIZE TABLE\u4ee5\u907f\u514d\u788e\u7247\u3002\u89c17.9O PTIMIZE TABLE\u53e5\u6cd5\u3002
\u53ef\u80fd\u65f6\u4f7f\u7528HEAP\u8868\u4ee5\u5f97\u5230\u66f4\u5feb\u7684\u901f\u5ea6\u3002\u89c19.4 MySQL\u8868\u7c7b\u578b\u3002
\u5f53\u4f7f\u7528\u4e00\u4e2a\u6b63\u5e38Web\u670d\u52a1\u5668\u8bbe\u7f6e\u65f6\uff0c\u56fe\u8c61\u5e94\u8be5\u4f5c\u4e3a\u6587\u4ef6\u5b58\u50a8\u3002\u8fd9\u4ec5\u5728\u6570\u636e\u5e93\u4e2d\u5b58\u50a8\u7684\u4e00\u672c\u6587\u4ef6\u7684\u5f15\u7528\u3002\u8fd9\u6837\u505a\u7684\u4e3b\u8981\u539f\u56e0\u662f\u662f\u4e00\u4e2a\u6b63\u5e38\u7684Web\u670d\u52a1\u5668\u5728\u7f13\u51b2\u6587\u4ef6\u6bd4\u6570\u636e\u5e93\u5185\u5bb9\u8981\u597d\u5f97\u591a\uff0c\u56e0\u6b64\u5982\u679c\u4f60\u6b63\u5728\u4f7f\u7528\u6587\u4ef6\uff0c\u8f83\u5bb9\u6613\u5f97\u5230\u4e00\u4e2a\u8f83\u5feb\u7684\u7cfb\u7edf\u3002
\u5bf9\u7ecf\u5e38\u5b58\u53d6\u7684\u4e0d\u91cd\u8981\u6570\u636e(\u8c61\u6709\u5173\u5bf9\u6ca1\u6709cookie\u7528\u6237\u6700\u540e\u663e\u793a\u6807\u8bed\u7684\u4fe1\u606f\uff09\u4f7f\u7528\u5185\u5b58\u8868\u3002
\u5728\u4e0d\u540c\u8868\u4e2d\u5177\u6709\u76f8\u540c\u4fe1\u606f\u7684\u5217\u5e94\u8be5\u88ab\u58f0\u660e\u4e3a\u76f8\u540c\u7684\u5e76\u6709\u76f8\u540c\u7684\u540d\u5b57\u3002\u5728\u7248\u672c 3.23 \u524d\uff0c\u4f60\u53ea\u80fd\u9760\u8f83\u6162\u7684\u8054\u7ed3\u3002\u5c1d\u8bd5\u4f7f\u540d\u5b57\u7b80\u5355\u5316(\u5728\u5ba2\u6237\u8868\u4e2d\u4f7f\u7528name\u800c\u4e0d\u662fcustomer_name)\u3002\u4e3a\u4e86\u4f7f\u4f60\u7684\u540d\u5b57\u80fd\u79fb\u690d\u5230\u5176\u4ed6SQL\u670d\u52a1\u5668\uff0c\u4f60\u5e94\u8be5\u4f7f\u4ed6\u4eec\u77ed\u4e8e18 \u4e2a\u5b57\u7b26\u3002
\u5982\u679c\u4f60\u9700\u8981\u786e\u5b9e\u9ad8\u7684\u901f\u5ea6\uff0c\u4f60\u5e94\u8be5\u7814\u7a76\u4e00\u4e0b\u4e0d\u540cSQL\u670d\u52a1\u5668\u652f\u6301\u7684\u6570\u636e\u5b58\u50a8\u7684\u5e95\u5c42\u63a5\u53e3\uff01\u4f8b\u5982\u76f4\u63a5\u5b58\u53d6MySQL MyISAM\uff0c\u6bd4\u8d77\u4f7f\u7528SQL \u63a5\u53e3\uff0c\u4f60\u80fd\u5f97\u52302-5\u500d\u7684\u901f\u5ea6\u63d0\u5347\u3002\u7136\u800c\u4e3a\u4e86\u80fd\u505a\u5230\u5b83\uff0c\u6570\u636e\u5fc5\u987b\u662f\u5728\u4e0e\u5e94\u7528\u7a0b\u5e8f\u6027\u5728\u540c\u4e00\u53f0\u673a\u5668\u7684\u670d\u52a1\u5668\u4e0a\uff0c\u5e76\u4e14\u901a\u5e38\u5b83\u53ea\u5e94\u8be5\u88ab\u4e00\u4e2a\u8fdb\u7a0b\u5b58\u53d6(\u56e0\u4e3a\u5916\u90e8\u6587\u4ef6\u9501\u5b9a\u786e\u5b9e\u5f88\u6162)\u3002\u901a\u8fc7\u5728MySQL\u670d\u52a1\u5668\u4e2d\u5f15\u8fdb\u5e95\u5c42MyISAM\u547d\u4ee4\u80fd\u6d88\u9664\u4ee5\u4e0a\u95ee\u9898(\u5982\u679c\u9700\u8981\uff0c\u8fd9\u53ef\u80fd\u662f\u83b7\u5f97\u66f4\u597d\u6027\u80fd\u7684\u4e00\u4e2a\u5bb9\u6613\u7684\u65b9\u6cd5)\u3002\u501f\u52a9\u7cbe\u5fc3\u8bbe\u8ba1\u7684\u6570\u636e\u5e93\u63a5\u53e3\uff0c\u5e94\u8be5\u76f8\u5f53\u5bb9\u6613\u652f\u6301\u8fd9\u7c7b\u4f18\u5316\u3002
\u5728\u8bb8\u591a\u60c5\u51b5\u4e0b\uff0c\u4ece\u4e00\u4e2a\u6570\u636e\u5e93\u5b58\u53d6\u6570\u636e(\u4f7f\u7528\u4e00\u4e2a\u5b9e\u65f6\u8fde\u63a5)\u6bd4\u5b58\u53d6\u4e00\u4e2a\u6587\u672c\u6587\u4ef6\u5feb\u4e9b\uff0c\u53ea\u662f\u56e0\u4e3a\u6570\u636e\u5e93\u6bd4\u6587\u672c\u6587\u4ef6\u66f4\u7d27\u51d1(\u5982\u679c\u4f60\u4f7f\u7528\u6570\u5b57\u6570\u636e)\u5e76\u4e14\u8fd9\u5c06\u6d89\u53ca\u66f4\u5c11\u7684\u78c1\u76d8\u5b58\u53d6\u3002\u4f60\u4e5f\u8282\u7701\u4ee3\u7801\uff0c\u56e0\u4e3a\u4f60\u4e0d\u987b\u5206\u6790\u4f60\u7684\u6587\u672c\u6587\u4ef6\u6765\u627e\u51fa\u884c\u548c\u5217\u7684\u8fb9\u754c\u3002
\u4f60\u4e5f\u80fd\u4f7f\u7528\u590d\u5236\u52a0\u901f\u3002\u89c119.1 \u6570\u636e\u5e93\u590d\u5236\u3002
10.8 \u4f7f\u7528\u4f60\u81ea\u5df1\u7684\u57fa\u51c6\u6d4b\u8bd5
\u4f60\u51b3\u5b9a\u5e94\u8be5\u6d4b\u8bd5\u4f60\u7684\u5e94\u7528\u7a0b\u5e8f\u548c\u6570\u636e\u5e93\uff0c\u4ee5\u53d1\u73b0\u74f6\u9888\u5728\u54ea\u513f\u3002\u901a\u8fc7\u4fee\u6b63\u5b83(\u6216\u901a\u8fc7\u7528\u4e00\u4e2a\u201c\u54d1\u6a21\u5757\u201d\u4ee3\u66ff\u74f6\u9888)\uff0c\u4f60\u80fd\u5bb9\u6613\u786e\u5b9a\u4e0b\u4e00\u4e2a\u74f6\u9888(\u7b49\u7b49)\u3002\u5373\u4f7f\u5bf9\u4f60\u7684\u5e94\u7528\u7a0b\u5e8f\u6765\u8bf4\uff0c\u6574\u4f53\u6027\u80fd\u201c\u8db3\u591f\u597d\u201d\uff0c\u4f60\u81f3\u5c11\u5e94\u8be5\u5bf9\u6bcf\u4e2a\u74f6\u9888\u505a\u4e00\u4e2a\u201c\u8ba1\u5212\u201d\uff0c\u5982\u679c\u67d0\u4eba\u201c\u786e\u5b9e\u9700\u8981\u4fee\u6b63\u5b83\u201d\uff0c\u5982\u4f55\u89e3\u51b3\u5b83\u3002 <\/p>\n
\u5bf9\u4e8e\u4e00\u4e9b\u53ef\u79fb\u690d\u7684\u57fa\u51c6\u7a0b\u5e8f\u7684\u4f8b\u5b50\uff0c\u53c2\u89c1MySQL\u57fa\u51c6\u5957\u4ef6\u3002\u89c111 MySQL \u57fa\u51c6\u5957\u4ef6\u3002\u4f60\u80fd\u5229\u7528\u8fd9\u4e2a\u5957\u4ef6\u7684\u4efb\u4f55\u7a0b\u5e8f\u5e76\u4e14\u4e3a\u4f60\u7684\u9700\u8981\u4fee\u6539\u5b83\u3002\u901a\u8fc7\u8fd9\u6837\u505a\uff0c\u4f60\u80fd\u5c1d\u8bd5\u4e0d\u540c\u7684\u4f60\u7684\u95ee\u9898\u7684\u89e3\u51b3\u65b9\u6848\u5e76\u6d4b\u8bd5\u54ea\u4e00\u4e2a\u5bf9\u4f60\u662f\u6700\u5feb\u7684\u89e3\u51b3\u65b9\u6848\u3002<\/p>\n
\u5728\u7cfb\u7edf\u8d1f\u8f7d\u7e41\u91cd\u65f6\u53d1\u751f\u4e00\u4e9b\u95ee\u9898\u662f\u5f88\u666e\u904d\u7684\uff0c\u5e76\u4e14\u6211\u4eec\u6709\u5f88\u591a\u4e0e\u6211\u4eec\u8054\u7cfb\u7684\u5ba2\u6237\uff0c\u4ed6\u4eec\u5728\u751f\u4ea7\u7cfb\u7edf\u4e2d\u6709\u4e00\u4e2a(\u6d4b\u8bd5)\u7cfb\u7edf\u5e76\u4e14\u6709\u8d1f\u8f7d\u95ee\u9898\u3002\u5230\u76ee\u524d\u4e3a\u6b62\uff0c\u88ab\u4e00\u79cd\u8fd9\u4e9b\u7684\u60c5\u51b5\u662f\u4e0e\u57fa\u672c\u8bbe\u8ba1\u6709\u5173\u7684\u95ee\u9898(\u8868\u626b\u63cf\u5728\u9ad8\u8d1f\u8f7d\u65f6\u8868\u73b0\u4e0d\u597d)\u6216OS\/\u5e93\u95ee\u9898\u3002\u5982\u679c\u7cfb\u7edf\u5df2\u7ecf\u4e0d\u5728\u751f\u4ea7\u7cfb\u7edf\u4e2d\uff0c\u5b83\u4eec\u5927\u591a\u6570\u5c06\u5f88\u5bb9\u6613\u4fee\u6b63\u3002 <\/p>\n
\u4e3a\u4e86\u907f\u514d\u8fd9\u6837\u7684\u95ee\u9898\uff0c\u4f60\u5e94\u8be5\u628a\u4e00\u4e9b\u529b\u6c14\u653e\u5728\u5728\u53ef\u80fd\u6700\u574f\u7684\u8d1f\u8f7d\u4e0b\u6d4b\u8bd5\u4f60\u7684\u6574\u4e2a\u5e94\u7528\uff01<\/p>\n
10.9 \u8bbe\u8ba1\u9009\u62e9
MySQL\u5728\u5206\u5f00\u7684\u6587\u4ef6\u4e2d\u5b58\u50a8\u884c\u6570\u636e\u548c\u7d22\u5f15\u6570\u636e\u3002\u8bb8\u591a(\u51e0\u4e4e\u5168\u90e8)\u5176\u4ed6\u6570\u636e\u5e93\u5728\u540c\u4e00\u4e2a\u6587\u4ef6\u4e2d\u6df7\u5408\u884c\u548c\u7d22\u5f15\u6570\u636e\u3002\u6211\u4eec\u76f8\u4fe1\uff0cMySQL\u7684\u9009\u62e9\u5bf9\u975e\u5e38\u5e7f\u6cdb\u7684\u73b0\u4ee3\u7cfb\u7edf\u7684\u6765\u8bf4\u662f\u8f83\u597d\u7684\u3002 <\/p>\n
\u5b58\u50a8\u884c\u6570\u636e\u7684\u53e6\u4e00\u4e2a\u65b9\u6cd5\u662f\u5728\u4e00\u4e2a\u5206\u5f00\u7684\u533a\u57df\u4fdd\u5b58\u6bcf\u5217\u4fe1\u606f(\u4f8b\u5b50\u662fSDBM\u548cFocus)\u3002\u8fd9\u5c06\u5bf9\u6bcf\u4e2a\u5b58\u53d6\u591a\u4e8e\u4e00\u5217\u7684\u67e5\u8be2\u83b7\u5f97\u4e00\u4e2a\u6027\u80fd\u7a81\u7834\u3002\u56e0\u4e3a\u5728\u591a\u4e8e\u4e00\u5217\u88ab\u5b58\u53d6\u65f6\uff0c\u8fd9\u5feb\u901f\u9000\u5316\uff0c\u6211\u4eec\u76f8\u4fe1\u8fd9\u4e2a\u6a21\u578b\u5bf9\u901a\u7528\u529f\u80fd\u7684\u6570\u636e\u5e93\u4e0d\u662f\u6700\u597d\u3002<\/p>\n
\u66f4\u5e38\u89c1\u7684\u60c5\u5f62\u662f\u7d22\u5f15\u548c\u6570\u636e\u4e00\u8d77\u88ab\u5b58\u50a8(\u5c31\u8c61Oracle\/Sybase)\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e2d\uff0c\u4f60\u5c06\u5728\u7d22\u5f15\u7684\u53f6\u5b50\u9875\u9762\u4e0a\u627e\u5230\u884c\u4fe1\u606f\u3002\u6709\u8fd9\u5e03\u5c40\u7684\u597d\u5904\u662f\u5b83\u5728\u8bb8\u591a\u60c5\u51b5\u4e0b(\u53d6\u51b3\u4e8e\u8fd9\u4e2a\u7d22\u5f15\u88ab\u7f13\u51b2\u5f97\u600e\u6837)\u8282\u7701\u4e00\u6b21\u78c1\u76d8\u8bfb\u3002\u6709\u8fd9\u5e03\u5c40\u7684\u574f\u5904\u662f\uff1a <\/p>\n
\u8868\u626b\u63cf\u66f4\u6162\uff0c\u56e0\u4e3a\u4f60\u5fc5\u987b\u8bfb\u5b8c\u7d22\u5f15\u4ee5\u83b7\u5f97\u6570\u636e\u3002
\u4f60\u635f\u5931\u5f88\u591a\u7a7a\u95f4\uff0c\u56e0\u4e3a\u4f60\u5fc5\u987b\u91cd\u590d\u6765\u81ea\u8282\u70b9\u7684\u7d22\u5f15(\u56e0\u4e3a\u4f60\u4e0d\u80fd\u5728\u8282\u70b9\u4e0a\u5b58\u50a8\u884c\uff09
\u5220\u9664\u5c06\u968f\u65f6\u95f4\u53d8\u5316\u6076\u5316\u6570\u636e\u5e93\u8868(\u56e0\u4e3a\u8282\u70b9\u4e2d\u7684\u7d22\u5f15\u5728\u5220\u9664\u540e\u901a\u5e38\u4e0d\u88ab\u66f4\u65b0)\u3002
\u4f60\u4e0d\u80fd\u4ec5\u4f7f\u7528\u7d22\u5f15\u8868\u4e3a\u4e00\u4e2a\u67e5\u8be2\u68c0\u7d22\u6570\u636e\u3002
\u7d22\u5f15\u6570\u636e\u5f88\u96be\u7f13\u51b2\u3002
10.10 MySQL\u8bbe\u8ba1\u5c40\u9650\/\u6298\u8877
\u56e0\u4e3aMySQL\u4f7f\u7528\u6781\u5feb\u7684\u8868\u9501\u5b9a(\u591a\u6b21\u8bfb\/\u4e00\u6b21\u5199)\uff0c\u7559\u4e0b\u7684\u6700\u5927\u95ee\u9898\u662f\u5728\u540c\u4e00\u4e2a\u8868\u4e2d\u7684\u4e00\u4e2a\u63d2\u5165\u7684\u7a33\u5b9a\u6570\u636e\u6d41\u4e0e\u6162\u901f\u9009\u62e9\u7684\u4e00\u4e2a\u6df7\u5408\u3002 <\/p>\n
\u6211\u4eec\u76f8\u4fe1\uff0c\u5728\u5176\u4ed6\u60c5\u51b5\u4e0b\uff0c\u5bf9\u5927\u591a\u6570\u7cfb\u7edf\uff0c\u5f02\u5e38\u5feb\u901f\u7684\u6027\u80fd\u4f7f\u5b83\u6210\u4e3a\u4e00\u4e2a\u8d62\u5bb6\u3002\u8fd9\u79cd\u60c5\u5f62\u901a\u5e38\u4e5f\u53ef\u80fd\u901a\u8fc7\u8868\u7684\u591a\u4e2a\u526f\u672c\u6765\u89e3\u51b3\uff0c\u4f46\u662f\u5b83\u8981\u82b1\u66f4\u591a\u7684\u529b\u6c14\u548c\u786c\u4ef6\u3002<\/p>\n
\u5bf9\u4e00\u4e9b\u5e38\u89c1\u7684\u5e94\u7528\u73af\u5883\uff0c\u6211\u4eec\u4e5f\u5728\u5f00\u53d1\u4e00\u4e9b\u6269\u5c55\u529f\u80fd\u4ee5\u89e3\u51b3\u6b64\u95ee\u9898\u3002 <\/p>\n
10.11 \u53ef\u79fb\u690d\u6027
\u56e0\u4e3a\u6240\u6709SQL\u670d\u52a1\u5668\u5b9e\u73b0\u4e86SQL\u7684\u4e0d\u540c\u90e8\u5206\uff0c\u8981\u82b1\u529f\u592b\u5199\u53ef\u79fb\u690d\u7684SQL\u5e94\u7528\u7a0b\u5e8f\u3002\u5bf9\u5f88\u7b80\u5355\u7684\u9009\u62e9\/\u63d2\u5165\uff0c\u5b83\u662f\u5f88\u5bb9\u6613\u7684\uff0c\u4f46\u662f\u4f60\u9700\u8981\u8d8a\u591a\uff0c\u5b83\u8d8a\u56f0\u96be\uff0c\u800c\u4e14\u5982\u679c\u4f60\u60f3\u8981\u5e94\u7528\u7a0b\u5e8f\u5bf9\u5f88\u591a\u6570\u636e\u5e93\u90fd\u5feb\uff0c\u5b83\u53d8\u5f97\u66f4\u96be\uff01<\/p>\n
\u4e3a\u4e86\u4f7f\u4e00\u4e2a\u590d\u6742\u5e94\u7528\u7a0b\u5e8f\u53ef\u79fb\u690d\uff0c\u4f60\u9700\u8981\u9009\u62e9\u5b83\u5e94\u8be5\u4e0e\u4e4b\u5de5\u4f5c\u7684\u5f88\u591aSQL\u670d\u52a1\u5668\u3002<\/p>\n
\u5f53\u4f60\u80fd\u4f7f\u7528MySQL\u7684crash-me \u7a0b\u5e8f\uff08http:\/\/www.mysql.com\/crash-me-choose.htmy\uff09\u6765\u627e\u51fa\u4f60\u80fd\u4e0e\u4e4b\u4f7f\u7528\u7684\u6570\u636e\u5e93\u670d\u52a1\u5668\u7684\u9009\u62e9\u7684\u51fd\u6570\u3001\u7c7b\u578b\u548c\u9650\u5236\u3002crash-me\u73b0\u5728\u5bf9\u4efb\u4f55\u53ef\u80fd\u7684\u4e8b\u60c5\u6d4b\u8bd5\u4e86\u5f88\u957f\u65f6\u95f4\uff0c\u4f46\u662f\u5b83\u4ecd\u7136\u7406\u89e3\u6d4b\u8bd5\u8fc7\u7684\u5927\u7ea6450\u4ef6\u4e8b\u60c5\u3002<\/p>\n
\u4f8b\u5982\uff0c\u5982\u679c\u4f60\u60f3\u8981\u80fd\u4f7f\u7528Informix \u6216 DB2\uff0c\u4f60\u4e0d\u5e94\u8be5\u6709\u6bd418\u4e2a\u5b57\u7b26\u66f4\u957f\u7684\u5217\u540d\u3002 <\/p>\n
MySQL\u57fa\u51c6\u7a0b\u5e8f\u548ccrash-me\u662f\u72ec\u7acb\u4e8e\u6570\u636e\u5e93\u7684\u3002\u901a\u8fc7\u89c2\u5bdf\u6211\u4eec\u600e\u4e48\u5904\u7406\u5b83\uff0c\u4f60\u80fd\u5f97\u5230\u4e00\u4e2a\u611f\u89c9\uff0c\u4f60\u5fc5\u987b\u4e3a\u7f16\u5199\u4f60\u7684\u72ec\u7acb\u4e8e\u6570\u636e\u5e93\u7684\u5e94\u7528\u7a0b\u5e8f\u505a\u4ec0\u4e48\u3002\u57fa\u51c6\u672c\u8eab\u53ef\u5728MySQL\u6e90\u4ee3\u7801\u5206\u53d1\u7684\u201csql-bench\u201d\u76ee\u5f55\u4e0b\u627e\u5230\u3002\u4ed6\u4eec\u7528DBI\u6570\u636e\u5e93\u63a5\u53e3\u4ee5Perl\u5199\u6210(\u5b83\u89e3\u51b3\u95ee\u9898\u7684\u5b58\u53d6\u90e8\u5206)\u3002<\/p>\n
\u5230http:\/\/www.mysql.com\/benchmark.html\u770b\u8fd9\u4e2a\u57fa\u51c6\u7684\u7ed3\u679c\u3002<\/p>\n
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