{"id":278,"date":"2007-04-10T18:04:19","date_gmt":"2007-04-10T10:04:19","guid":{"rendered":"http:\/\/www.jason695.idv.tw:81\/wordpress\/?p=278"},"modified":"2015-03-08T18:47:38","modified_gmt":"2015-03-08T10:47:38","slug":"mysql%e7%9a%84%e6%95%b8%e5%80%bc%e9%a1%9e%e5%9e%8b","status":"publish","type":"post","link":"https:\/\/jason695.why3s.tw\/wordpress\/2007\/04\/10\/mysql%e7%9a%84%e6%95%b8%e5%80%bc%e9%a1%9e%e5%9e%8b\/","title":{"rendered":"MySQL\u7684\u6578\u503c\u985e\u578b"},"content":{"rendered":"

11.2.\u00a0<\/span><\/strong>\u6578\u503c\u985e\u578b<\/span><\/o><\/span><\/strong><\/p>\n

MySQL<\/span>\u652f\u63f4\u6240\u6709\u6a19\u6e96<\/span>SQL<\/span>\u6578\u503c\u8cc7\u6599\u985e\u578b\u3002\u9019\u4e9b\u985e\u578b\u5305\u62ec\u56b4\u683c\u6578\u503c\u8cc7\u6599\u985e\u578b(INTEGER<\/span>\u3001SMALLINT<\/span>\u3001DECIMAL<\/span>\u548cNUMERIC)<\/span>\uff0c\u4ee5\u53ca\u8fd1\u4f3c\u6578\u503c\u8cc7\u6599\u985e\u578b(FLOAT<\/span>\u3001REAL<\/span>\u548cDOUBLE PRECISION)<\/span>\u3002\u95dc\u9375\u5b57INT<\/span>\u662fINTEGER<\/span>\u7684\u540c\u7fa9\u8a5e\uff0c\u95dc\u9375\u5b57DEC<\/span>\u662fDECIMAL<\/span>\u7684\u540c\u7fa9\u8a5e\u3002<\/o><\/span><\/p>\n

BIT<\/span>\u8cc7\u6599\u985e\u578b\u4fdd\u5b58\u4f4d\u6b04\u4f4d\u503c\uff0c\u4e26\u4e14\u652f\u63f4<\/span>MyISAM<\/span>\u3001MEMORY<\/span>\u3001InnoDB<\/span>\u548cBDB<\/span>\u8868\u3002<\/o><\/span><\/p>\n

\u4f5c\u70ba<\/span>SQL<\/span>\u6a19\u6e96\u7684\u64f4\u5c55\uff0cMySQL<\/span>\u4e5f\u652f\u63f4\u6574\u6578\u985e\u578bTINYINT<\/span>\u3001MEDIUMINT<\/span>\u548cBIGINT<\/span>\u3002\u4e0b\u9762\u7684\u8868\u986f\u793a\u4e86\u9700\u8981\u7684\u6bcf\u500b\u6574\u6578\u985e\u578b\u7684\u5b58\u5132\u548c\u7bc4\u570d\u3002<\/o><\/span><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\n

\u985e\u578b<\/span><\/strong><\/o><\/span><\/p>\n<\/td>\n

\n

\u4f4d\u5143\u7d44<\/span><\/strong><\/o><\/span><\/p>\n<\/td>\n

\n

\u6700\u5c0f\u503c<\/span><\/strong><\/o><\/span><\/p>\n<\/td>\n

\n

\u6700\u5927\u503c<\/span><\/strong><\/o><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

\u00a0<\/o><\/span><\/p>\n<\/td>\n

\n

\u00a0<\/o><\/span><\/p>\n<\/td>\n

\n

(<\/span><\/strong>\u5e36\u7b26\u865f\u7684<\/span>\/<\/span>\u7121\u7b26\u865f\u7684)<\/span><\/strong><\/o><\/span><\/p>\n<\/td>\n

\n

(<\/span><\/strong>\u5e36\u7b26\u865f\u7684<\/span>\/<\/span>\u7121\u7b26\u865f\u7684)<\/span><\/strong><\/o><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

TINYINT<\/o><\/span><\/p>\n<\/td>\n

\n

1<\/o><\/span><\/p>\n<\/td>\n

\n

-128<\/o><\/span><\/p>\n<\/td>\n

\n

127<\/o><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

\u00a0<\/o><\/span><\/p>\n<\/td>\n

\n

\u00a0<\/o><\/span><\/p>\n<\/td>\n

\n

0<\/o><\/span><\/p>\n<\/td>\n

\n

255<\/o><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

SMALLINT<\/o><\/span><\/p>\n<\/td>\n

\n

2<\/o><\/span><\/p>\n<\/td>\n

\n

-32768<\/o><\/span><\/p>\n<\/td>\n

\n

32767<\/o><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

\u00a0<\/o><\/span><\/p>\n<\/td>\n

\n

\u00a0<\/o><\/span><\/p>\n<\/td>\n

\n

0<\/o><\/span><\/p>\n<\/td>\n

\n

65535<\/o><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

MEDIUMINT<\/o><\/span><\/p>\n<\/td>\n

\n

3<\/o><\/span><\/p>\n<\/td>\n

\n

-8388608<\/o><\/span><\/p>\n<\/td>\n

\n

8388607<\/o><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

\u00a0<\/o><\/span><\/p>\n<\/td>\n

\n

\u00a0<\/o><\/span><\/p>\n<\/td>\n

\n

0<\/o><\/span><\/p>\n<\/td>\n

\n

16777215<\/o><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

INT<\/o><\/span><\/p>\n<\/td>\n

\n

4<\/o><\/span><\/p>\n<\/td>\n

\n

-2147483648<\/o><\/span><\/p>\n<\/td>\n

\n

2147483647<\/o><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

\u00a0<\/o><\/span><\/p>\n<\/td>\n

\n

\u00a0<\/o><\/span><\/p>\n<\/td>\n

\n

0<\/o><\/span><\/p>\n<\/td>\n

\n

4294967295<\/o><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

BIGINT<\/o><\/span><\/p>\n<\/td>\n

\n

8<\/o><\/span><\/p>\n<\/td>\n

\n

-9223372036854775808<\/o><\/span><\/p>\n<\/td>\n

\n

9223372036854775807<\/o><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

\u00a0<\/o><\/span><\/p>\n<\/td>\n

\n

\u00a0<\/o><\/span><\/p>\n<\/td>\n

\n

0<\/o><\/span><\/p>\n<\/td>\n

\n

18446744073709551615<\/o><\/span><\/p>\n<\/td>\n<\/tr>\n<\/table>\n

MySQL<\/span>\u9084\u652f\u6301\u9078\u64c7\u5728\u8a72\u985e\u578b\u95dc\u9375\u5b57\u5f8c\u9762\u7684\u62ec\u5f27\u5167\u6307\u5b9a\u6574\u6578\u503c\u7684\u986f\u793a\u5bec\u5ea6<\/span>(<\/span>\u4f8b\u5982\uff0cINT(4))<\/span>\u3002\u8a72\u53ef\u9078\u986f\u793a\u5bec\u5ea6\u898f\u5b9a\u7528\u65bc\u986f\u793a\u5bec\u5ea6\u5c0f\u65bc\u6307\u5b9a\u7684\u5217\u5bec\u5ea6\u7684\u503c\u6642\u5f9e\u5de6\u5074\u586b\u6eff\u5bec\u5ea6\u3002<\/o><\/span><\/p>\n

\u986f\u793a\u5bec\u5ea6\u4e26\u4e0d\u9650\u5236\u53ef\u4ee5\u5728\u5217\u5167\u4fdd\u5b58\u7684\u503c\u7684\u7bc4\u570d\uff0c\u4e5f\u4e0d\u9650\u5236\u8d85\u904e\u5217\u7684\u6307\u5b9a\u5bec\u5ea6\u7684\u503c\u7684\u986f\u793a\u3002<\/span><\/o><\/span><\/p>\n

\u7576\u7d50\u5408\u53ef\u9078\u64f4\u5c55\u5c6c\u6027<\/span>ZEROFILL<\/span>\u4f7f\u7528\u6642\uff0c \u9ed8\u8a8d\u88dc\u5145\u7684\u7a7a\u683c\u7528\u96f6\u4ee3\u66ff\u3002\u4f8b\u5982\uff0c\u5c0d\u65bc\u8072\u660e\u70baINT(5) ZEROFILL<\/span>\u7684\u5217\uff0c\u503c4<\/span>\u6aa2\u7d22\u70ba00004<\/span>\u3002\u8acb\u6ce8\u610f\u5982\u679c\u5728\u6574\u6578\u5217\u4fdd\u5b58\u8d85\u904e\u986f\u793a\u5bec\u5ea6\u7684\u4e00\u500b\u503c\uff0c\u7576MySQL<\/span>\u70ba\u8907\u96dc\u806f\u63a5\u751f\u6210\u81e8\u6642\u8868\u6642\u6703\u9047\u5230\u554f\u984c\uff0c\u56e0\u70ba\u5728\u9019\u4e9b\u60c5\u6cc1\u4e0bMySQL<\/span>\u76f8\u4fe1\u8cc7\u6599\u9069\u5408\u539f\u5217\u5bec\u5ea6\u3002<\/o><\/span><\/p>\n

\u6240\u6709\u6574\u6578\u985e\u578b\u53ef\u4ee5\u6709\u4e00\u500b\u53ef\u9078<\/span>(<\/span>\u975e\u6a19\u6e96)<\/span>\u5c6c\u6027UNSIGNED<\/span>\u3002\u7576\u4f60\u60f3\u8981\u5728\u5217\u5167\u53ea\u5141\u8a31\u975e\u8ca0\u6578\u548c\u8a72\u5217\u9700\u8981\u8f03\u5927\u7684\u4e0a\u9650\u6578\u503c\u7bc4\u570d\u6642\u53ef\u4ee5\u4f7f\u7528\u7121\u7b26\u865f\u503c\u3002<\/o><\/span><\/p>\n

\u6d6e\u9ede\u548c\u5b9a\u9ede\u985e\u578b\u4e5f\u53ef\u4ee5\u70ba<\/span>UNSIGNED<\/span>\u3002\u540c\u6578\u985e\u578b\uff0c\u8a72\u5c6c\u6027\u9632\u6b62\u8ca0\u503c\u4fdd\u5b58\u5230\u5217\u4e2d\u3002\u7136\u800c\uff0c\u8207\u6574\u6578\u985e\u578b\u4e0d\u540c\u7684\u662f\uff0c\u5217\u503c\u7684\u4e0a\u7bc4\u570d\u4fdd\u6301\u4e0d\u8b8a\u3002<\/o><\/span><\/p>\n

\u5982\u679c\u70ba\u4e00\u500b\u6578\u503c\u5217\u6307\u5b9a<\/span>ZEROFILL<\/span>\uff0cMySQL<\/span>\u81ea\u52d5\u70ba\u8a72\u5217\u6dfb\u52a0UNSIGNED<\/span>\u5c6c\u6027\u3002<\/o><\/span><\/p>\n

\u5c0d\u65bc\u6d6e\u9ede\u5217\u985e\u578b\uff0c\u5728<\/span>MySQL<\/span>\u4e2d\u55ae\u7cbe\u78ba\u5ea6\u503c\u4f7f\u75284<\/span>\u500b\u4f4d\u5143\u7d44\uff0c\u96d9\u7cbe\u5ea6\u503c\u4f7f\u75288<\/span>\u500b\u4f4d\u5143\u7d44\u3002<\/o><\/span><\/p>\n

FLOAT<\/span>\u985e\u578b\u7528\u65bc\u8868\u793a\u8fd1\u4f3c\u6578\u503c\u8cc7\u6599\u985e\u578b\u3002<\/span>SQL<\/span>\u6a19\u6e96\u5141\u8a31\u5728\u95dc\u9375\u5b57FLOAT<\/span>\u5f8c\u9762\u7684\u62ec\u5f27\u5167\u9078\u64c7\u7528\u4f4d\u6307\u5b9a\u7cbe\u5ea6(<\/span>\u4f46\u4e0d\u80fd\u70ba\u6307\u6578\u7bc4\u570d)<\/span>\u3002MySQL<\/span>\u9084\u652f\u63f4\u53ef\u9078\u7684\u53ea\u7528\u65bc\u78ba\u5b9a\u5b58\u5132\u5927\u5c0f\u7684\u7cbe\u5ea6\u898f\u5b9a\u30020<\/span>\u523023<\/span>\u7684\u7cbe\u5ea6\u5c0d\u61c9FLOAT<\/span>\u5217\u76844<\/span>\u4f4d\u5143\u7d44\u55ae\u7cbe\u78ba\u5ea6\u300224<\/span>\u523053<\/span>\u7684\u7cbe\u5ea6\u5c0d\u61c9DOUBLE<\/span>\u5217\u76848<\/span>\u4f4d\u5143\u7d44\u96d9\u7cbe\u5ea6\u3002<\/o><\/span><\/p>\n

MySQL<\/span>\u5141\u8a31\u4f7f\u7528\u975e\u6a19\u6e96\u8a9e\u6cd5\uff1a<\/span>FLOAT(M<\/em>,D<\/em>)<\/span>\u6216REAL(M<\/em>,D<\/em>)<\/span>\u6216DOUBLE PRECISION(M<\/em>,D<\/em>)<\/span>\u3002\u9019\u88cf\uff0c\u201c(M<\/em>,D<\/em>)\u201d<\/span>\u8868\u793a\u8a72\u503c\u4e00\u5171\u986f\u793aM<\/span><\/em>\u4f4d\u5143\u6574\u6578\uff0c\u5176\u4e2dD<\/span><\/em>\u4f4d\u5143\u4f4d\u65bc\u5c0f\u6578\u9ede\u5f8c\u9762\u3002\u4f8b\u5982\uff0c\u5b9a\u7fa9\u70baFLOAT(7,4)<\/span>\u7684\u4e00\u500b\u5217\u53ef\u4ee5\u986f\u793a\u70ba-999.9999<\/span>\u3002MySQL<\/span>\u4fdd\u5b58\u503c\u6642\u9032\u884c\u56db\u6368\u4e94\u5165\uff0c\u56e0\u6b64\u5982\u679c\u5728FLOAT(7,4)<\/span>\u5217\u5167\u63d2\u5165999.00009<\/span>\uff0c\u8fd1\u4f3c\u7d50\u679c\u662f999.0001<\/span>\u3002<\/o><\/span><\/p>\n

MySQL<\/span>\u5c07<\/span>DOUBLE<\/span>\u8996\u70baDOUBLE PRECISION(<\/span>\u975e\u6a19\u6e96\u64f4\u5c55)<\/span>\u7684\u540c\u7fa9\u8a5e\u3002MySQL<\/span>\u9084\u5c07REAL<\/span>\u8996\u70baDOUBLE PRECISION(<\/span>\u975e\u6a19\u6e96\u64f4\u5c55)<\/span>\u7684\u540c\u7fa9\u8a5e\uff0c\u9664\u975eSQL<\/span>\u4f3a\u670d\u5668\u6a21\u5f0f\u5305\u62ecREAL_AS_FLOAT<\/span>\u9078\u9805\u3002<\/o><\/span><\/p>\n

\u70ba\u4e86\u4fdd\u8b49\u6700\u5927\u53ef\u80fd\u7684\u53ef\u651c\u6027\uff0c\u9700\u8981\u4f7f\u7528\u8fd1\u4f3c\u6578\u503c\u8cc7\u6599\u503c\u5b58\u5132\u7684\u4ee3\u78bc\u61c9\u4f7f\u7528<\/span>FLOAT<\/span>\u6216DOUBLE PRECISION<\/span>\uff0c\u4e0d\u898f\u5b9a\u7cbe\u5ea6\u6216\u4f4d\u6578\u3002<\/o><\/span><\/p>\n

DECIMAL<\/span>\u548c<\/span>NUMERIC<\/span>\u985e\u578b\u5728MySQL<\/span>\u4e2d\u8996\u70ba\u76f8\u540c\u7684\u985e\u578b\u3002\u5b83\u5011\u7528\u65bc\u4fdd\u5b58\u5fc5\u9808\u70ba\u78ba\u5207\u7cbe\u5ea6\u7684\u503c\uff0c\u4f8b\u5982\u8ca8\u5e63\u8cc7\u6599\u3002\u7576\u8072\u660e\u8a72\u985e\u578b\u7684\u5217\u6642\uff0c\u53ef\u4ee5(<\/span>\u4e26\u4e14\u901a\u5e38\u8981)<\/span>\u6307\u5b9a\u7cbe\u5ea6\u548c\u6a19\u5ea6\uff1b\u4f8b\u5982\uff1a<\/o><\/span><\/p>\n

salary DECIMAL(5,2)<\/o><\/span><\/p>\n

\u5728\u8a72\u4f8b\u5b50\u4e2d\uff0c<\/span>5<\/span>\u662f\u7cbe\u5ea6\uff0c2<\/span>\u662f\u6a19\u5ea6\u3002\u7cbe\u5ea6\u8868\u793a\u4fdd\u5b58\u503c\u7684\u4e3b\u8981\u4f4d\u6578\uff0c\u6a19\u5ea6\u8868\u793a\u5c0f\u6578\u9ede\u5f8c\u9762\u53ef\u4ee5\u4fdd\u5b58\u7684\u4f4d\u6578\u3002<\/o><\/span><\/p>\n

\u5728<\/span>MySQL 5.1<\/span>\u4e2d\u4ee5\u4e8c\u9032\u4f4d\u683c\u5f0f\u4fdd\u5b58DECIMAL<\/span>\u548cNUMERIC<\/span>\u503c\u3002<\/o><\/span><\/p>\n

\u6a19\u6e96<\/span>SQL<\/span>\u8981\u6c42salary<\/span>\u5217\u80fd\u5920\u75285<\/span>\u4f4d\u5143\u6574\u6578\u4f4d\u5143\u548c\u5169\u4f4d\u5143\u5c0f\u6578\u4fdd\u5b58\u4efb\u4f55\u503c\u3002\u56e0\u6b64\uff0c\u5728\u9019\u7a2e\u60c5\u6cc1\u4e0b\u53ef\u4ee5\u4fdd\u5b58\u5728salary<\/span>\u5217\u7684\u503c\u7684\u7bc4\u570d\u662f\u5f9e-999.99<\/span>\u5230999.99<\/span>\u3002<\/o><\/span><\/p>\n

\u5728\u6a19\u6e96<\/span>SQL<\/span>\u4e2d\uff0c\u8a9e\u6cd5DECIMAL(M<\/em>)<\/span>\u7b49\u50f9\u65bcDECIMAL(M<\/em>,0)<\/span>\u3002\u540c\u6a23\uff0c\u8a9e\u6cd5DECIMAL<\/span>\u7b49\u50f9\u65bcDECIMAL(M<\/em>,0)<\/span>\uff0c\u53ef\u4ee5\u901a\u904e\u8a08\u7b97\u78ba\u5b9aM<\/span><\/em>\u7684\u503c\u3002\u5728MySQL 5.1<\/span>\u4e2d\u652f\u63f4DECIMAL<\/span>\u548cNUMERIC<\/span>\u8cc7\u6599\u985e\u578b\u7684\u8b8a\u6578\u5f62\u5f0f\u3002M<\/span><\/em>\u9810\u8a2d\u503c\u662f10<\/span>\u3002<\/o><\/span><\/p>\n

DECIMAL<\/span>\u6216<\/span>NUMERIC<\/span>\u7684\u6700\u5927\u4f4d\u6578\u662f65<\/span>\uff0c\u4f46\u5177\u9ad4\u7684DECIMAL<\/span>\u6216NUMERIC<\/span>\u5217\u7684\u5be6\u969b\u7bc4\u570d\u53d7\u5177\u9ad4\u5217\u7684\u7cbe\u5ea6\u6216\u6a19\u5ea6\u7d04\u675f\u3002\u5982\u679c\u6b64\u985e\u5217\u5206\u914d\u7684\u503c\u5c0f\u6578\u9ede\u5f8c\u9762\u7684\u4f4d\u6578\u8d85\u904e\u6307\u5b9a\u7684\u6a19\u5ea6\u5141\u8a31\u7684\u7bc4\u570d\uff0c\u503c\u88ab\u8f49\u63db\u70ba\u8a72\u6a19\u5ea6\u3002(<\/span>\u5177\u9ad4\u64cd\u4f5c\u8207\u4f5c\u696d\u7cfb\u7d71\u6709\u95dc\uff0c\u4f46\u4e00\u822c\u7d50\u679c\u5747\u88ab\u622a\u53d6\u5230\u5141\u8a31\u7684\u4f4d\u6578\uff09\u3002<\/o><\/span><\/p>\n

BIT<\/span>\u8cc7\u6599\u985e\u578b\u53ef\u7528\u4f86\u4fdd\u5b58\u4f4d\u6b04\u4f4d\u503c\u3002<\/span>BIT(M<\/em>)<\/span>\u985e\u578b\u5141\u8a31\u5b58\u5132M<\/span><\/em>\u4f4d\u5143\u503c\u3002M<\/span><\/em>\u7bc4\u570d\u70ba1<\/span>\u523064<\/span>\u3002<\/o><\/span><\/p>\n

\u8981\u6307\u5b9a\u4f4d\u503c\uff0c\u53ef\u4ee5\u4f7f\u7528<\/span>b’value<\/em>‘<\/span>\u7b26\u3002value<\/span><\/em>\u662f\u4e00\u500b\u75280<\/span>\u548c1<\/span>\u7de8\u5beb\u7684\u4e8c\u9032\u4f4d\u503c\u3002\u4f8b\u5982\uff0cb’111′<\/span>\u548cb’100000000′<\/span>\u5206\u5225\u8868\u793a7<\/span>\u548c128<\/span>\u3002\u53c3\u898b9.1.5<\/span>\u7bc0\uff0c\u201c<\/span><\/span><\/span>\u4f4d\u6b04\u4f4d\u503c\u201d<\/span>\u3002<\/o><\/span><\/p>\n

\u5982\u679c\u70ba<\/span>BIT(M)<\/span>\u5217\u5206\u914d\u7684\u503c\u7684\u9577\u5ea6\u5c0f\u65bcM<\/span><\/em>\u4f4d\uff0c\u5728\u503c\u7684\u5de6\u908a\u75280<\/span>\u586b\u5145\u3002\u4f8b\u5982\uff0c\u70baBIT(6)<\/span>\u5217\u5206\u914d\u4e00\u500b\u503cb’101′<\/span>\uff0c\u5176\u6548\u679c\u8207\u5206\u914db’000101′<\/span>\u76f8\u540c\u3002<\/o><\/span><\/p>\n

\u7576\u8981\u5728\u4e00\u500b\u6578\u503c\u5217\u5167\u4fdd\u5b58\u4e00\u500b\u8d85\u51fa\u8a72\u5217\u5141\u8a31\u7bc4\u570d\u7684\u503c\u6642\uff0c<\/span>MySQL<\/span>\u7684\u64cd\u4f5c\u53d6\u6c7a\u65bc\u6b64\u6642\u6709\u6548\u7684SQL<\/span>\u6a21\u5f0f\u3002\u5982\u679c\u6a21\u5f0f\u672a\u8a2d\u7f6e\uff0cMySQL<\/span>\u5c07\u503c\u88c1\u526a\u5230\u7bc4\u570d\u7684\u76f8\u61c9\u7aef\u9ede\uff0c\u4e26\u4fdd\u5b58\u88c1\u6e1b\u597d\u7684\u503c\u3002\u4f46\u662f\uff0c\u5982\u679c\u6a21\u5f0f\u8a2d\u7f6e\u70batraditional(\u201c<\/span>\u56b4\u683c\u6a21\u5f0f\u201d)<\/span>\uff0c\u8d85\u51fa\u7bc4\u570d\u7684\u503c\u5c07\u88ab\u62d2\u7d55\u4e26\u63d0\u793a\u932f\u8aa4\uff0c\u4e26\u4e14\u6839\u64daSQL<\/span>\u6a19\u6e96\u63d2\u5165\u6703\u5931\u6557\u3002\u53c3\u898b5.3.2<\/span>\u7bc0\uff0c\u201cSQL<\/span><\/span><\/span>\u4f3a\u670d\u5668\u6a21\u5f0f\u201d<\/span>\u3002<\/o><\/span><\/p>\n

\u5982\u679c<\/span>INT<\/span>\u5217\u662fUNSIGNED<\/span>\uff0c\u5217\u7bc4\u570d\u7684\u5927\u5c0f\u76f8\u540c\uff0c\u4f46\u5176\u7aef\u9ede\u6703\u8b8a\u70ba\u52300<\/span>\u548c4294967295<\/span>\u3002\u5982\u679c\u4f60\u8a66\u5716\u4fdd\u5b58-9999999999<\/span>\u548c9999999999<\/span>\uff0c\u4ee5\u975e\u56b4\u683c\u6a21\u5f0f\u4fdd\u5b58\u5230\u5217\u4e2d\u7684\u503c\u662f0<\/span>\u548c4294967296<\/span>\u3002<\/o><\/span><\/p>\n

\u5982\u679c\u5728\u6d6e\u9ede\u6216\u5b9a\u9ede\u5217\u4e2d\u5206\u914d\u7684\u503c\u8d85\u904e\u6307\u5b9a<\/span>(<\/span>\u6216\u9ed8\u8a8d)<\/span>\u7cbe\u5ea6\u548c\u6a19\u5ea6\u898f\u5b9a\u7684\u7bc4\u570d\uff0cMySQL<\/span>\u4ee5\u975e\u56b4\u683c\u6a21\u5f0f\u4fdd\u5b58\u8868\u793a\u7bc4\u570d\u76f8\u61c9\u7aef\u9ede\u7684\u503c\u3002<\/o><\/span><\/p>\n

\u7576<\/span>MySQL<\/span>\u6c92\u6709\u5de5\u4f5c\u5728\u56b4\u683c\u6a21\u5f0f\u6642\uff0c\u5c0d\u65bcALTER TABLE<\/span>\u3001LOAD DATA INFILE<\/span>\u3001UPDATE<\/span>\u548c\u591a\u884cINSERT<\/span>\u8a9e\u53e5\uff0c\u7531\u65bc\u88c1\u526a\u767c\u751f\u7684\u8f49\u63db\u5c07\u5831\u544a\u70ba\u8b66\u544a\u3002\u7576MySQL<\/span>\u5de5\u4f5c\u5728\u56b4\u683c\u6a21\u5f0f\u6642\uff0c\u9019\u4e9b\u8a9e\u53e5\u5c07\u5931\u6557\uff0c\u4e26\u4e14\u90e8\u5206\u6216\u5168\u90e8\u503c\u4e0d\u6703\u63d2\u5165\u6216\u66f4\u6539\uff0c\u53d6\u6c7a\u65bc\u662f\u5426\u8868\u70ba\u4e8b\u52d9\u8868\u548c\u5176\u4ed6\u56e0\u7d20\u3002\u8a73\u60c5\u53c3\u898b5.3.2<\/span>\u7bc0\uff0c\u201cSQL<\/span><\/span><\/span>\u4f3a\u670d\u5668\u6a21\u5f0f\u201d<\/span>\u3002<\/o><\/span><\/p>\n

\u00a0<\/o><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

11.2.\u00a0\u6578\u503c\u985e\u578b MySQL\u652f\u63f4\u6240\u6709\u6a19\u6e96SQL\u6578\u503c\u8cc7\u6599\u985e\u578b\u3002\u9019\u4e9b\u985e\u578b\u5305\u62ec\u56b4\u683c\u6578\u503c\u8cc7\u6599\u985e\u578b(INTEGER\u3001 … \u95b1\u8b80\u5168\u6587 MySQL\u7684\u6578\u503c\u985e\u578b<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[5],"tags":[],"class_list":["post-278","post","type-post","status-publish","format-standard","hentry","category-5","no-featured-image"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/jason695.why3s.tw\/wordpress\/wp-json\/wp\/v2\/posts\/278","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jason695.why3s.tw\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jason695.why3s.tw\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jason695.why3s.tw\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/jason695.why3s.tw\/wordpress\/wp-json\/wp\/v2\/comments?post=278"}],"version-history":[{"count":0,"href":"https:\/\/jason695.why3s.tw\/wordpress\/wp-json\/wp\/v2\/posts\/278\/revisions"}],"wp:attachment":[{"href":"https:\/\/jason695.why3s.tw\/wordpress\/wp-json\/wp\/v2\/media?parent=278"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jason695.why3s.tw\/wordpress\/wp-json\/wp\/v2\/categories?post=278"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jason695.why3s.tw\/wordpress\/wp-json\/wp\/v2\/tags?post=278"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}