{"id":897,"date":"2022-03-19T16:52:36","date_gmt":"2022-03-19T08:52:36","guid":{"rendered":"https:\/\/www.buyao007.icu\/?p=897"},"modified":"2022-03-19T17:39:19","modified_gmt":"2022-03-19T09:39:19","slug":"mysql%e5%9f%ba%e7%a1%80%e5%90%8d%e8%af%8d%e8%ae%a4%e8%af%86","status":"publish","type":"post","link":"https:\/\/www.buyao007.icu\/?p=897","title":{"rendered":"3.Mysql\u57fa\u7840\u540d\u8bcd\u8ba4\u8bc6"},"content":{"rendered":"\n

\u5b59\u5bcc\u9633\uff0c \u6c5f\u6e56\u4eba\u79f0\u6ca1\u4eba\u79f0\u3002\u591a\u5e74\u4e92\u8054\u7f51\u8fd0\u7ef4\u5de5\u4f5c\u7ecf\u9a8c\uff0c\u66fe\u8d1f\u8d23\u8fc7\u5b59\u5e03\u65af\u5927\u89c4\u6a21\u96c6\u7fa4\u67b6\u6784\u81ea\u52a8\u5316\u8fd0\u7ef4\u7ba1\u7406\u5de5\u4f5c\u3002\u64c5\u957fWeb\u96c6\u7fa4\u67b6\u6784\u4e0e\u81ea\u52a8\u5316\u8fd0\u7ef4\uff0c\u66fe\u8d1f\u8d23\u56fd\u5185\u67d0\u5927\u578b\u535a\u5ba2\u7f51\u7ad9\u8fd0\u7ef4\u5de5\u4f5c\u3002<\/p>\n\n\n\n

1.sql_mode<\/h2>\n\n\n\n

1.\u4f5c\u7528<\/em><\/strong><\/p>\n\n\n\n

\u4fdd\u8bc1\u6570\u636e\u51c6\u786e \u7b26\u5408\u5e38\u8bc6 \u4f8b\u5982\u96f6\u5e74\u96f6\u6708\u662f\u4e0d\u5b58\u5728\u7684\u3002\u662f\u4e0d\u4f1a\u88ab\u5199\u5165\u6570\u636e\u5e93\u7684 5.7\u7248\u672c\u4ee5\u540e\u542f\u7528\u4e86\u8be5\u6a21\u5f0f<\/p>\n\n\n\n

2.\u5982\u4f55\u67e5\u770bsql_mode\u4fe1\u606f<\/em><\/strong><\/p>\n\n\n\n

mysql> select @@sql_mode;<\/code><\/pre>\n\n\n\n
2.\u5b57\u7b26\u96c6<\/h2>\n\n\n\n
1.\u4f5c\u7528<\/em><\/strong><\/p>\n\n\n\n
\u5b57\u7b26\u7684\u8f6c\u6362<\/p>\n\n\n\n
2.\u67e5\u770b\u6570\u636e\u5e93\u652f\u6301\u7684\u5b57\u7b26\u96c6<\/em><\/strong><\/p>\n\n\n\n
mysql> show charset;\r\n8.0 \u9ed8\u8ba4\uff1autf8mb4\r\n8.0\u4e4b\u524d\u9ed8\u8ba4\uff1alatin1<\/code><\/pre>\n\n\n\n
3.\u5efa\u8bae\u5b57\u7b26\u96c6<\/em><\/strong><\/p>\n\n\n\n
utf8 \uff1a\u6700\u5927\u5b58\u50a83\u5b57\u8282\u5b57\u7b26\uff0c\u4e00\u4e2a\u4e2d\u6587\u5b57\u7b26\u53603\u4e2a\u5b57\u8282\uff0c\u56e0\u6b64\u53ef\u4ee5\u5b58\u4e2d\u6587
utf8mb4\uff1a\u6700\u5927\u5b58\u50a84\u5b57\u8282\u5b57\u7b26\uff0c\u53ef\u4ee5\u5b58\u50a8emoji\uff08\u8868\u60c5\u5305\u5b57\u7b26\uff09\u3002<\/p>\n\n\n\n
3.\u6392\u5e8f\u89c4\u5219<\/h2>\n\n\n\n
1.\u4f5c\u7528<\/em><\/strong><\/p>\n\n\n\n
\u5f71\u54cd\u6392\u5e8f \u00a0\u5bf9\u4e8e\u4e0d\u540c\u7684\u5b57\u7b26\u96c6\uff0c\u6709\u4e0d\u540c\u7684\u6392\u5e8f\u89c4\u5219\u3002\u4f8b\u5982\u67e5\u51fa\u6765\u7684\u8868\u662fA\u6392\u5728\u4e0a\u9762\u8fd8\u662fa\u6392\u5728\u4e0a\u9762<\/p>\n\n\n\n
2.\u67e5\u8be2\u652f\u6301\u7684\u6392\u5e8f\u89c4\u5219<\/em><\/strong><\/p>\n\n\n\n
mysql> show collation;<\/code><\/pre>\n\n\n\n
4.\u6570\u636e\u7c7b\u578b<\/h2>\n\n\n\n
1.\u4f5c\u7528<\/em><\/strong><\/p>\n\n\n\n
\u63a7\u5236\u5b58\u50a8\u6570\u636e\u7684\u683c\u5f0f\u548c\u89c4\u8303 \u4f8b\u5982\uff1a\u67d0\u5217\u5fc5\u987b\u5b58\u6570\u5b57\uff0c\u67d0\u5217\u5fc5\u987b\u5b58\u5b57\u6bcd\u7b49<\/p>\n\n\n\n
2.\u79cd\u7c7b<\/em><\/strong><\/p>\n\n\n\n
a \u6570\u5b57<\/p>\n\n\n\n
\u6574\u6570\uff1a\r\n     tinyint   1bytes  0~255   -128~127\r\n     int       4bytes  0~2^32-1 -2^31~2^31-1  10\u4f4d\u6570\r\n     bigint   8bytes  0~2^64-1 -2^63~2^63-1   20\u4f4d\u6570\r\n\u6d6e\u70b9\u6570\uff1a\r\n     decimal  \u548c\u91d1\u94b1\u6709\u5173\uff08\u7cbe\u5ea6\u8981\u6c42\u9ad8\uff09\u7684\u4f7f\u7528decimal\r\n     \u666e\u901a\u7684\uff08\u7cbe\u5ea6\u8981\u6c42\u4e0d\u9ad8\u7684\uff09\uff0c\u653e\u5927N\u500d\uff0c\u7528\u6574\u6570\u5b58\u50a8\u3002\r<\/code><\/pre>\n\n\n\n
b\u5b57\u7b26\u4e32<\/p>\n\n\n\n
char(10)\r\nvarchar(10)\r\nenum(\u56fa\u5b9a\u503c\u2019sd\u2019,\u2019sx\u2019)\r\n             1      2  ###\u4e0b\u6807\u7d22\u5f15\nchar(10)\u548cvarchar(10)\u533a\u522b<\/strong>\r\n             \u5171\u540c\u70b9\uff1a\u90fd\u662f\u5b57\u7b26\u4e32\u7c7b\u578b\uff0c\u6700\u591a\u90fd\u53ea\u80fd\u5b5810\u4e2a\u5b57\u7b26\r\n             \u4e0d\u540c\u70b9\uff1a1.char\u5b9a\u957f\uff08\u76f4\u63a5\u5206\u914d10\u4e2a\u7a7a\u95f4\uff0c\u6027\u80fd\u597d\uff0c\u4f46\u662f\u6d6a\u8d39\u7a7a\u95f4\uff09\uff0cvarchar\u53d8\u957f\uff08\u6309\u9700\u5206\u914d\uff0c\u8282\u7ea6\u7a7a\u95f4\uff09\uff0c\u5982\u679c\u5b58\u50a8\u53d8\u957f\u5b57\u7b26\u4e32\uff0c\u5982\u540d\u5b57\uff0c\u5efa\u8bae\u4f7f\u7528varchar\r\n                     2.varchar\u7c7b\u578b\uff0c\u989d\u5916\u5360\u75281~2\u4e2a\u5b57\u8282\uff0c\u5b58\u50a8\u5b57\u7b26\u957f\u5ea6\u3002\r\n\r<\/code><\/pre>\n\n\n\n
c\u65f6\u95f4\u7c7b\u578b<\/p>\n\n\n\n
\u4f8b\u5982\u7edf\u8ba1\u4e00\u4e0b\u5e74\u5ea6\u8d26\u5355\r\ntimestamp\u65f6\u95f4\u62334\u5b57\u8282  \u6709\u65f6\u95f4\u8303\u56f4\u9650\u52361970-2038\r\ndatetime        8\u5b57\u8282   1000\u5e741\u67081\u52309999\u5e7412\u670831\r<\/code><\/pre>\n\n\n\n
d \u4e8c\u8fdb\u5236\uff08\u4e0d\u7528\uff09<\/p>\n\n\n\n
e json(\u5e94\u7528\u4e0d\u591a\uff0c\u51e0\u4e4e\u770b\u4e0d\u5230)<\/p>\n\n\n\n
5.\u7ea6\u675f<\/h2>\n\n\n\n
\u4f8b\u5982\u6ce8\u518c\u8d26\u53f7\uff0c\u6709\u4e9b\u5e26\u661f\u7684\u4e3a\u5fc5\u586b\u7684\uff0c\u4e0d\u586b\u5c31\u4e0d\u8ba9\u6ce8\u518c\u3002\r\nPK primary key \u4e3b\u952e \u975e\u7a7a\u4e14\u552f\u4e00\r\nNN not null    \u975e\u7a7a\r\nUK unique key  \u552f\u4e00\r\nFK\r\n\u5efa\u8bae\uff1a\r\n   1.\u6bcf\u5f20\u8868\u8bbe\u7f6e\u4e3b\u952e\uff0c\u5efa\u8bae\u662f\u6570\u5b57\u81ea\u589e\u5217\r\n   2.\u5c3d\u91cf\u5bf9\u6bcf\u4e2a\u5217\u8bbe\u7f6e\u975e\u7a7a\r<\/code><\/pre>\n\n\n\n
6.\u5176\u4ed6\u5c5e\u6027<\/h2>\n\n\n\n
default           \u9ed8\u8ba4\u503c\r\nauto_increment   \u81ea\u589e\u957f\uff08\u4e3b\u952e\u81ea\u589e\u5217\uff09\r\nunsigned        \u6570\u5b57\u5217\uff0c\u65e0\u7b26\u53f7\uff08\u975e\u8d1f\u6570\uff09\r\ncomment        \u6ce8\u91ca\r<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
\u5b59\u5bcc\u9633\uff0c \u6c5f\u6e56\u4eba\u79f0\u6ca1\u4eba\u79f0\u3002\u591a\u5e74\u4e92\u8054\u7f51\u8fd0\u7ef4\u5de5\u4f5c\u7ecf\u9a8c\uff0c\u66fe\u8d1f\u8d23\u8fc7\u5b59\u5e03\u65af\u5927\u89c4\u6a21\u96c6\u7fa4\u67b6\u6784\u81ea\u52a8\u5316\u8fd0\u7ef4\u7ba1\u7406\u5de5\u4f5c\u3002\u64c5\u957fWeb\u96c6 […]<\/p>\n","protected":false},"author":1,"featured_media":246,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[29],"tags":[],"_links":{"self":[{"href":"https:\/\/www.buyao007.icu\/index.php?rest_route=\/wp\/v2\/posts\/897"}],"collection":[{"href":"https:\/\/www.buyao007.icu\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.buyao007.icu\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.buyao007.icu\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.buyao007.icu\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=897"}],"version-history":[{"count":4,"href":"https:\/\/www.buyao007.icu\/index.php?rest_route=\/wp\/v2\/posts\/897\/revisions"}],"predecessor-version":[{"id":904,"href":"https:\/\/www.buyao007.icu\/index.php?rest_route=\/wp\/v2\/posts\/897\/revisions\/904"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.buyao007.icu\/index.php?rest_route=\/wp\/v2\/media\/246"}],"wp:attachment":[{"href":"https:\/\/www.buyao007.icu\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=897"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.buyao007.icu\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=897"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.buyao007.icu\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=897"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}