{"id":1378,"date":"2021-09-09T21:50:49","date_gmt":"2021-09-09T13:50:49","guid":{"rendered":"https:\/\/blog.odliken.top\/?p=1378"},"modified":"2021-09-09T21:50:49","modified_gmt":"2021-09-09T13:50:49","slug":"mysql%e5%9f%ba%e7%a1%80%e4%b9%8b%e6%95%b0%e6%8d%ae%e7%b1%bb%e5%9e%8b","status":"publish","type":"post","link":"https:\/\/blog.odjbinail.cn\/?p=1378","title":{"rendered":"MySQL\u57fa\u7840\u4e4b\u6570\u636e\u7c7b\u578b"},"content":{"rendered":"<h2>\u6570\u636e\u5e93\u7b80\u4ecb\u53ca\u5b89\u88c5<\/h2>\n<ul>\n<li>\n<p>MySQL \u5c5e\u4e8e\u5173\u7cfb\u578b\u6570\u636e\u5e93<\/p>\n<\/li>\n<li>\n<p>MySQL \u662f\u6309\u7167\u6570\u636e\u7ed3\u6784\u6765\u7ec4\u7ec7\u3001\u5b58\u50a8\u548c\u7ba1\u7406\u6570\u636e\u7684\u4ed3\u5e93<br \/>\n<img data-original=\"https:\/\/blog.odjbinail.cn\/wp-content\/uploads\/2021\/09\/L4@FXIBQXW9258ISWY.png\"  alt=\"\" \/><\/p>\n<noscript><img decoding=\"async\" src=\"https:\/\/blog.odjbinail.cn\/wp-content\/uploads\/2021\/09\/L4@FXIBQXW9258ISWY.png\" alt=\"\" \/><\/p><\/noscript>\n<ul>\n<li>\u767b\u5f55\uff1amysql -uroot -p<\/li>\n<li>\u9000\u51fa\uff1aexit \/ quit \/ \\q<\/li>\n<li>\u6e05\u5c4f\uff1acls<\/li>\n<li>\u5f97\u5230\u7248\u672c\u53f7\uff1amysql -V \/ mysql --version<\/li>\n<li>\u767b\u5f55\u7684\u540c\u65f6\u6253\u5f00\u6307\u5b9a\u6570\u636e\u5e93\uff1amysql -uroot -p -D db_name<\/li>\n<li>\u767b\u5f55\u4fe1\u606f\u4e2d\u9700\u8981\u638c\u63e1\u7684\uff1a\u547d\u4ee4\u884c\u7ed3\u675f\u7b26\u9ed8\u8ba4\u4f7f\u7528\uff1b\u6216\u8005\\g \u6765\u7ed3\u675f<br \/>\n\u53ef\u4ee5\u901a\u8fc7 help \u6216\u8005\\h \u6216\u8005?\u52a0\u4e0a\u76f8\u5173\u5173\u952e\u5b57\u6765\u67e5\u770b\u624b\u518c<br \/>\nhelp creat database<\/li>\n<li>\\c \u53ef\u4ee5\u53d6\u6d88\u5f53\u524d\u547d\u4ee4\u7684\u6267\u884c<br \/>\n<h2>\u5e38\u7528 SQL \u8bed\u53e5<\/h2>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u5e38\u7528 MySQL \u7684\u5173\u952e\u5b57\u6211\u4eec\u9700\u8981\u5927\u5199\uff0c\u5e93\u540d\u3001\u8868\u540d\u3001\u5b57\u6bb5\u540d\u79f0\u7b49\u4f7f\u7528\u5c0f\u5199<\/p>\n<\/li>\n<li>\n<p>SQL \u8bed\u53e5\u652f\u6301\u6298\u884c\u64cd\u4f5c,\u62c6\u5206\u7684\u65f6\u5019\u4e0d\u80fd\u628a\u5b8c\u6574\u5355\u8bcd\u62c6\u5f00<\/p>\n<\/li>\n<li>\n<p>\u6570\u636e\u5e93\u540d\u79f0\u3001\u8868\u540d\u79f0\u3001\u5b57\u6bb5\u540d\u79f0\u4e0d\u8981\u4f7f\u7528 MySQL \u7684\u4fdd\u7559\u5b57\uff0c\u5982\u679c\u5fc5\u987b\u8981\u4f7f\u7528\uff0c\u9700\u8981\u7528\u53cd\u5f15\u53f7``\u5c06\u5176\u62ec\u8d77\u6765<\/p>\n<\/li>\n<li>\n<p>\u8bed\u53e5<\/p>\n<ul>\n<li>SELECT USER() \u5f97\u5230\u767b\u9646\u7684\u7528\u6237<\/li>\n<li>SELECT VERSION() \u5f97\u5230 MySQL \u7684\u7248\u672c\u4fe1\u606f<\/li>\n<li>SELECT NOW() \u5f97\u5230\u5f53\u524d\u7684\u65e5\u671f\u65f6\u95f4<\/li>\n<li>SELECT DATABASE() \u5f97\u5230\u5f53\u524d\u6253\u5f00\u7684\u6570\u636e\u5e93<\/li>\n<li>SHOW WARNINGS; \u67e5\u770b\u4e0a\u4e00\u6b65\u64cd\u4f5c\u4ea7\u751f\u7684\u8b66\u544a\u4fe1\u606f<\/li>\n<li>mysql \u4e2d\u7684\u6ce8\u91ca\uff1a#\u6ce8\u91ca\u5185\u5bb9 --\u6ce8\u91ca\u5185\u5bb9<br \/>\n<h2>\u521b\u5efa\u548c\u7ba1\u7406\u6570\u636e\u5e93\u5e38\u7528\u64cd\u4f5c<\/h2>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u521b\u5efa\u6570\u636e\u5e93\uff1aCREATE{DATABASE|SCHEMA] db_name;<\/p>\n<ul>\n<li>\u68c0\u6d4b\u6570\u636e\u5e93\u540d\u79f0\u662f\u5426\u5b58\u5728\uff0c\u4e0d\u5b58\u5728\u5219\u521b\u5efa\uff1aCREATE DATABASE [IF NOT EXISTS] db_name;<\/li>\n<li>\u5728\u521b\u5efa\u6570\u636e\u5e93\u7684\u540c\u65f6\u6307\u5b9a\u7f16\u7801\u65b9\u5f0f\uff1aCREATE DATABASE [IF NOT EXISTS] db_name [DEFAULT] CHARACTER SET[=] charset;<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u6ce8\u610f\uff1a<\/p>\n<ul>\n<li>\u6570\u636e\u5e93\u540d\u79f0\u6700\u597d\u6709\u610f\u4e49<\/li>\n<li>\u540d\u79f0\u4e0d\u8981\u5305\u542b\u7279\u6b8a\u5b57\u7b26\u6216\u8005\u662f MySQL \u5173\u952e\u5b57<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u67e5\u8be2\u5f53\u524d\u670d\u52a1\u5668\u4e0b\u5168\u90e8\u6570\u636e\u5e93\uff1a SHOW DATABASES|SCHEMAS;<\/p>\n<\/li>\n<li>\n<p>\u67e5\u770b\u6307\u5b9a\u6570\u636e\u5e93\u7684\u8be6\u7ec6\u4fe1\u606f\uff1aSHOW CREATE DATABASE db_name;<\/p>\n<\/li>\n<li>\n<p>\u4fee\u6539\u6307\u5b9a\u6570\u636e\u5e93\u7684\u7f16\u7801\u65b9\u5f0f\uff1aALTER DATABASE db_name [DEFAULT] CHARACTER SET [=] charset;<\/p>\n<\/li>\n<li>\n<p>\u6253\u5f00\u6307\u5b9a\u6570\u636e\u5e93\uff1aUSE db_name;<\/p>\n<\/li>\n<li>\n<p>\u5f97\u5230\u5f53\u524d\u6253\u5f00\u7684\u6570\u636e\u5e93\uff1aSELECT DATABASE()|SCHEMA();<\/p>\n<\/li>\n<li>\n<p>\u5220\u9664\u6307\u5b9a\u7684\u6570\u636e\u5e93:DROP DATABASE db_name;\u67e5\u770b\uff1aSHOW DATABASES;<\/p>\n<\/li>\n<li>\n<p>\u5982\u679c\u6570\u636e\u5e93\u5b58\u5728\u5219\u5220\u9664\uff1aDROP DATABASE [IF EXISTS] db_name;<\/p>\n<h2>\u6570\u636e\u8868\u53ca\u6570\u636e\u7c7b\u578b\u7b80\u4ecb<\/h2>\n<\/li>\n<li>\n<p>\u662f\u6570\u636e\u5e93\u6700\u91cd\u8981\u7684\u7ec4\u6210\u90e8\u5206\u4e4b\u4e00\uff0c\u6570\u636e\u662f\u4fdd\u5b58\u5728\u6570\u636e\u8868\u4e2d<\/p>\n<\/li>\n<li>\n<p>\u6570\u636e\u8868\u7531\u884c(row)\u548c\u5217(column)\u6765\u7ec4\u6210<\/p>\n<\/li>\n<li>\n<p>\u6bcf\u4e2a\u6570\u636e\u8868\u4e2d\u81f3\u5c11\u6709\u4e00\u5217\uff0c\u884c\u53ef\u4ee5\u6709\u96f6\u884c\u4e00\u884c\u6216\u8005\u591a\u884c\u7ec4\u6210<\/p>\n<\/li>\n<li>\n<p>\u8868\u540d\u8981\u6c42\u552f\u4e00\uff0c\u4e0d\u8981\u7279\u6b8a\u5b57\u7b26\uff0c\u6700\u597d\u542b\u4e49\u660e\u786e<\/p>\n<\/li>\n<li>\n<p>\u521b\u5efa\u6570\u636e\u8868\uff1aCREATE TABLE [IF NOT EXISTS] tbl..name(<br \/>\n\u5b57\u6bb5\u540d\u79f0 \u5b57\u6bb5\u7c7b\u578b [\u5b8c\u6574\u6027\u7ea6\u675f\u6761\u4ef6],<br \/>\n\u5b57\u6bb5\u7c7b\u578b [\u5b8c\u6574\u6027\u7ea6\u675f\u6761\u4ef6],<br \/>\n...<br \/>\n)ENGINE=\u5b58\u50a8\u5f15\u64ce CHARSET=\u7f16\u7801\u65b9\u5f0f;<\/p>\n<\/li>\n<\/ul>\n<h2>MySQL \u4e2d\u5e38\u7528\u7684\u6570\u636e\u7c7b\u578b<\/h2>\n<ul>\n<li>\n<p>MYSQL \u4e2d\u7684\u6570\u636e\u7c7b\u578b<\/p>\n<ul>\n<li>\n<p>\u6570\u503c\u578b<br \/>\n\u6574\u6570\u578b<br \/>\n<img data-original=\"https:\/\/blog.odjbinail.cn\/wp-content\/uploads\/2021\/09\/NV74BXZ7VN4LA25DNO8.png\"  alt=\"\" \/><br \/>\n<noscript><img decoding=\"async\" src=\"https:\/\/blog.odjbinail.cn\/wp-content\/uploads\/2021\/09\/NV74BXZ7VN4LA25DNO8.png\" alt=\"\" \/><br \/><\/noscript>\n\u6d6e\u70b9\u578b\u3001\u5b9a\u70b9\u6570 DECIMAL<br \/>\n<img data-original=\"https:\/\/blog.odjbinail.cn\/wp-content\/uploads\/2021\/09\/ARE3Y5BXKQCJWNZK1.png\"  alt=\"\" \/><\/p>\n<noscript><img decoding=\"async\" src=\"https:\/\/blog.odjbinail.cn\/wp-content\/uploads\/2021\/09\/ARE3Y5BXKQCJWNZK1.png\" alt=\"\" \/><\/p><\/noscript>\n<\/li>\n<li>\n<p>\u5b57\u7b26\u4e32\u7c7b\u578b\uff1a<br \/>\n<img data-original=\"https:\/\/blog.odjbinail.cn\/wp-content\/uploads\/2021\/09\/GRP7NX5M6ZN29_OM_QO.png\"  alt=\"\" \/><\/p>\n<noscript><img decoding=\"async\" src=\"https:\/\/blog.odjbinail.cn\/wp-content\/uploads\/2021\/09\/GRP7NX5M6ZN29_OM_QO.png\" alt=\"\" \/><\/p><\/noscript>\n<\/li>\n<li>\n<p>\u65e5\u671f\u65f6\u95f4\u7c7b\u578b<br \/>\n<img data-original=\"https:\/\/blog.odjbinail.cn\/wp-content\/uploads\/2021\/09\/6TRR8847VO88RE2UPOD.png\"  alt=\"\" \/><\/p>\n<noscript><img decoding=\"async\" src=\"https:\/\/blog.odjbinail.cn\/wp-content\/uploads\/2021\/09\/6TRR8847VO88RE2UPOD.png\" alt=\"\" \/><\/p><\/noscript>\n<\/li>\n<\/ul>\n<\/li>\n<li>CHAR \u7c7b\u578b\u5b58\u50a8\u7684\u6700\u5927\u5b57\u8282\u6570\u662f\uff08<br \/>\n255\uff09<\/p>\n<h2>\u7b80\u5355\u6155\u8bfe\u7528\u6237\u6570\u636e\u8868\u521b\u5efa<\/h2>\n<\/li>\n<li>\u67e5\u770b\u5f53\u524d\u6570\u636e\u5e93\u4e0b\u5df2\u6709\u6570\u636e\u8868\uff1aSHOW TABLES;<\/li>\n<li>SHOW [FULL] TABLES [{FROM | lN} db_name] [LIKE 'pattern' | WHERE expr]<\/li>\n<li>\u67e5\u770b\u6307\u5b9a\u6570\u636e\u8868\u7684\u8be6\u7ec6\u4fe1\u606f\uff1aSHOW CREATE TABLE tbl_name;<\/li>\n<li>\u67e5\u770b\u8868\u7ed3\u6784\uff1aDESC tbl_name;<\/li>\n<li>DESCRIBE tbl_name;<\/li>\n<li>SHOW COLUMNS FROM tbl_name;<\/li>\n<li>\u5220\u9664 imooc_user \u8868<\/li>\n<li>DROP TABLE [IF EXISTS] tbl_name;<br \/>\n<h2>\u5b8c\u6574\u6027\u7ea6\u675f\u6761\u4ef6\u4ecb\u7ecd<\/h2>\n<\/li>\n<li>\u521b\u5efa\u6570\u636e\u8868\uff1aCREATE TABLE [IF NOT EXISTS] tbl..name(<br \/>\n\u5b57\u6bb5\u540d\u79f0 \u5b57\u6bb5\u7c7b\u578b [\u5b8c\u6574\u6027\u7ea6\u675f\u6761\u4ef6],<br \/>\n\u5b57\u6bb5\u7c7b\u578b [\u5b8c\u6574\u6027\u7ea6\u675f\u6761\u4ef6],<br \/>\n...<br \/>\n)ENGINE=\u5b58\u50a8\u5f15\u64ce CHARSET=\u7f16\u7801\u65b9\u5f0f;<br \/>\n\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/<\/li>\n<li>unsigned \u65e0\u7b26\u53f7\uff0c\u6ca1\u6709\u8d1f\u6570\uff0c\u4ece 0 \u5f00\u59cb<\/li>\n<li>zerofill  \u96f6\u586b\u5145\uff0c\u5f53\u6570\u636e\u7684\u663e\u793a\u957f\u5ea6\u4e0d\u591f\u7684\u65f6\u5019\u53ef\u4ee5\u4f7f\u7528\u524d\u8865 0 \u7684\u6548\u679c\u586b\u5145\u81f3\u6307\u5b9a\u957f\u5ea6<\/li>\n<li>NOT NULL \u975e\u7a7a\u7ea6\u675f\uff0c\u4e5f\u5c31\u662f\u63d2\u5165\u503c\u7684\u65f6\u5019\u8fd9\u4e2a\u5b57\u6bb5\u5fc5\u987b\u8981\u7ed9\u503c\uff0c\u503c\u4e0d\u80fd\u4e3a\u7a7a<\/li>\n<li>DEFAULT  \u9ed8\u8ba4\u503c\uff0c\u5982\u679c\u63d2\u5165\u8bb0\u5f55\u7684\u65f6\u5019\u6ca1\u6709\u7ed9\u5b57\u6bb5\u8d4b\u503c\uff0c\u5219\u4f7f\u7528\u9ed8\u8ba4\u503c<\/li>\n<li>PRIMARY KEY  \u4e3b\u952e\uff0c\u6807\u8bc6\u8bb0\u5f55\u7684\u552f\u4e00\u6027\uff0c\u503c\u4e0d\u80fd\u91cd\u590d\uff0c\u4e00\u4e2a\u8868\u53ea\u80fd\u6709\u4e00\u4e2a\u4e3b\u952e\uff0c\u81ea\u52a8\u7981\u6b62\u4e3a\u7a7a<\/li>\n<li>UNIQUE KEY  \u552f\u4e00\u6027\uff0c\u4e00\u4e2a\u8868\u4e2d\u53ef\u4ee5\u6709\u591a\u4e2a\u5b57\u6bb5\u662f\u552f\u4e00\u7d22\u5f15\uff0c\u540c\u6837\u7684\u503c\u4e0d\u80fd\u91cd\u590d\uff0c\u4f46\u662f NULL \u503c\u9664\u5916<\/li>\n<li>AUTO_INCREMENT \u81ea\u52a8\u589e\u957f\uff0c\u53ea\u80fd\u7528\u4e8e\u6570\u503c\u5217\uff0c\u800c\u4e14\u914d\u5408\u7d22\u5f15\u6240\u6709\uff0c\u9ed8\u8ba4\u8d77\u59cb\u503c\u4ece 1 \u5f00\u59cb\uff0c\u6bcf\u6b21\u589e\u957f 1<\/li>\n<li>FOREIGN KEY  \u5916\u952e\u7ea6\u675f<\/li>\n<li>MySQL \u4e2d\u81ea\u52a8\u7f16\u53f7\u7684\u5173\u952e\u5b57\u662f AUTO_INCREMENT<\/li>\n<li>MySQL \u4e2d\u8868\u793a\u552f\u4e00\u7ea6\u675f\u7684\u5173\u952e\u5b57\u662f UNIQUE KEY<\/li>\n<\/ul>\n<pre class=\"prettyprint linenums\" ><code>-- \u7528\u6237\u8868 imooc_user\nCREATE TABLE IF NOT EXISTS imooc_user(\nid INT,\nusername VARCHAR(20),\npassword CHAR(32),\nemail VARCHAR(50),\nage TINYINT,\ncard CHAR(18),\ntel CHAR(11),\nsalary FLOAT(8,2),\nmarried TINYINT(1),\naddr VARCHAR(100),\nsex ENUM(&#039;\u7537&#039;,&#039;\u5973&#039;,&#039;\u4fdd\u5bc6&#039;)\n)ENGINE=INNODB CHARSET=UTF8;\n-- INSERT [INTO] tbl_name(id,username,...) VALUES(1,&#039;KING&#039;,...);\n-- \u5411 imooc_user \u8868\u63d2\u5165\u4e00\u6761\u8bb0\u5f55\nINSERT imooc_user(id,username,password,email,age,card,tel,salary,married,addr,sex)\nVALUES(1,&#039;king&#039;,&#039;king&#039;,&#039;382771946@qq.com&#039;,24,&#039;230112197809871234&#039;,&#039;18635579617&#039;,88888.68,0,&#039;\u5317\u4eac&#039;,&#039;\u7537&#039;);\n-- \u67e5\u8be2\u8868\u4e2d\u6240\u6709\u8bb0\u5f55 SELECT * FROM tbl_name;\nSELECT * FROM imooc_user;\nINSERT imooc_user(id,username,password,email,age,card,tel,salary,married,addr,sex)\nVALUES(-5,&#039;king&#039;,&#039;123456&#039;,&#039;382771946@qq.com&#039;,19,&#039;230112197809871234&#039;,&#039;18635579617&#039;,2345.68,1,&#039;\u5317\u4eac&#039;,&#039;\u5973&#039;);<\/code><\/pre>\n<h2>\u6d4b\u8bd5\u6574\u578b<\/h2>\n<ul>\n<li>TINYINT \u65e0\u7b26\u53f7\u578b\u5b58\u50a8\u8303\u56f4\u662f\uff1f0 \u5230 255<\/li>\n<\/ul>\n<pre class=\"prettyprint linenums\" ><code>-- \u6d4b\u8bd5\u6574\u578b\nCREATE TABLE test_int(\n    a tinyint,\n    b smallint,\n    c mediumint,\n    d int,\n    e bigint\n);\nINSERT test_int(a) VALUES(-128);\n-- \u5982\u679c\u8d85\u51fa\u6570\u636e\u7684\u8303\u56f4\uff0c\u4f1a\u4ea7\u751f\u622a\u65ad\u73b0\u8c61\nINSERT test_int(a) VALUES(-129);\nINSERT test_int(a) VALUES(1270);\n-- \u6d4b\u8bd5\u65e0\u7b26\u53f7\nCREATE TABLE test_unsigned(\na tinyint,\nb tinyint unsigned\n);\nINSERT test_unsigned(a,b) VALUES(-12,-12);\nINSERT test_unsigned(a,b) VALUES(0,0);\nINSERT test_unsigned(a,b) VALUES(0,256);\n-- \u6d4b\u8bd5\u96f6\u586b\u5145 ZEROFILL\nCREATE TABLE test_int1(\n    a tinyint ZEROFILL,\n    b smallint ZEROFILL,\n    c mediumint ZEROFILL,\n    d int ZEROFILL,\n    e bigint ZEROFILL\n);\nINSERT test_int1(a,b,c,d,e) VALUES(1,1,1,1,1);\nCREATE TABLE test_int2(\n    a tinyint(2),\n    b smallint(2)\n);\nINSERT test_int2(a,b) VALUES(123,45678);<\/code><\/pre>\n<h2>\u6d4b\u8bd5\u6d6e\u70b9\u7c7b\u578b<\/h2>\n<pre class=\"prettyprint linenums\" ><code>-- \u6d4b\u8bd5\u6d6e\u70b9\u578b\nCREATE TABLE test_float(\na FLOAT(6,2),\nb DOUBLE(6,2),\nc DECIMAL(6,2)\n);\nINSERT test_float(a,b,c) VALUES(4.143,4.146,4.149);\nCREATE TABLE test_float1(\na FLOAT,\nb DOUBLE,\nc DECIMAL\n);\nINSERT test_float1(a,b,c) VALUES(4.143,4.146,4.649);<\/code><\/pre>\n<h2>\u6d4b\u8bd5\u5b57\u7b26\u4e32\u7c7b\u578b\u3001ENUM \u548c SET \u7c7b\u578b<\/h2>\n<ul>\n<li>\u5b57\u7b26\u4e32\u7c7b\u578b\uff1aCHAR \u6548\u7387\u9ad8\u4e8e VARCHAR,CHAR \u76f8\u5f53\u4e8e\u62ff\u7a7a\u95f4\u6362\u65f6\u95f4\uff0cVARCHAR \u62ff\u65f6\u95f4\u6362\u7a7a\u95f4<\/li>\n<li>CHAR \u9ed8\u8ba4\u5b58\u50a8\u6570\u636e\u7684\u65f6\u5019\uff0c\u540e\u9762\u4f1a\u7528\u7a7a\u683c\u586b\u5145\u5230\u6307\u5b9a\u957f\u5ea6\uff1b\u800c\u5728\u68c0\u7d22\u7684\u65f6\u5019\u4f1a\u53bb\u6389\u540e\u9762\u7a7a\u683c\uff1bVARCHAR \u5728\u4fdd\u5b58\u7684\u65f6\u5019\u4e0d\u8fdb\u884c\u586b\u5145\uff0c\u5c3e\u90e8\u7684\u7a7a\u683c\u4f1a\u7559\u4e0b<\/li>\n<li>TEXT \u5217\u4e0d\u80fd\u6709\u9ed8\u8ba4\u503c\uff0c\u68c0\u7d22\u7684\u65f6\u5019\u4e0d\u5b58\u5728\u5927\u5c0f\u5199\u7684\u8f6c\u6362<\/li>\n<li>TEXT \u7c7b\u578b\u6700\u5927\u5b58\u50a8\u5b57\u8282\u662f\uff1f65535<\/li>\n<li>ENUM \u662f\u679a\u4e3e\u7c7b\u578b\uff0c\u4f1a\u81ea\u52a8\u8fc7\u6ee4\u6389\u7a7a\u683c<\/li>\n<li>ENUM \u7c7b\u578b\u548c SET \u7c7b\u578b\u7684\u533a\u522b<br \/>\nENUM \u53ef\u4ee5\u7528\u6765\u5b9a\u4e49\u6027\u522b\u8fd9\u79cd\u4e8c\u9009\u4e00\u7684\u60c5\u51b5<br \/>\nENUM \u7c7b\u578b\u53ea\u80fd\u4ece\u5217\u8868\u4e2d\u7684\u503c\u9009\u4e00\u4e2a\uff0cSET \u7c7b\u578b\u53ef\u4ee5\u4ece\u5217\u51fa\u7684\u503c\u4e2d\u9009\u591a\u4e2a<\/li>\n<\/ul>\n<pre class=\"prettyprint linenums\" ><code>SHOW DATABASES;\nuse imooc;\n-- \u6d4b\u8bd5 char \u548c varchar\nCREATE TABLE test_str(\n    a CHAR(5),\n    b VARCHAR(5)\n);\nINSERT test_str(a,b) VALUES(&#039;&#039;,&#039;&#039;);\nINSERT test_str(a,b) VALUES(&#039;a&#039;,&#039;a&#039;);\nINSERT test_str(a,b) VALUES(&#039;ab&#039;,&#039;ab&#039;);\nINSERT test_str(a,b) VALUES(&#039;abc&#039;,&#039;abc&#039;);\nINSERT test_str(a,b) VALUES(&#039;abcd&#039;,&#039;abcd&#039;);\nINSERT test_str(a,b) VALUES(&#039;abcde&#039;,&#039;abcde&#039;);\nINSERT test_str(a,b) VALUES(&#039;abcdef&#039;,&#039;abcdef&#039;);\nINSERT test_str(a,b) VALUES(&#039; 123 &#039;,&#039; 123 &#039;);\nselect * from test_str;\nshow warnings;\nSELECT CONCAT(&#039;*&#039;,a,&#039;*&#039;),CONCAT(&#039;*&#039;,b,&#039;*&#039;) FROM test_str;\n-- \u6d4b\u8bd5 TEXT \u4e0d\u80fd\u6709\u9ed8\u8ba4\u503c\nCREATE TABLE test_str1(\n content TEXT DEFAULT &#039;THIS IS A TEST&#039;\n);\n-- \u6d4b\u8bd5 ENUM\nCREATE TABLE test_enum(\nsex ENUM(&#039;\u7537     &#039;,&#039;\u5973 &#039;,&#039;\u4fdd\u5bc6 &#039;)\n);\nDESC test_enum;\nINSERT test_enum(sex) VALUES(&#039;\u7537&#039;);\nINSERT test_enum(sex) VALUES(&#039;\u7537 1&#039;);\nINSERT test_enum(sex) VALUES(NULL);\nINSERT test_enum(sex) VALUES(1);\nINSERT test_enum(sex) VALUES(3);\nINSERT test_enum(sex) VALUES(5);\nSELECT * FROM test_enum;\n-- \u6d4b\u8bd5 SET\nCREATE TABLE test_set(\n    a SET(&#039;A&#039;,&#039;B&#039;,&#039;C&#039;,&#039;D&#039;,&#039;E&#039;,&#039;F&#039;)\n);\nINSERT test_set(a) VALUES(&#039;A&#039;);\nINSERT test_set(a) VALUES(&#039;C&#039;);\nINSERT test_set(a) VALUES(&#039;C,D,E&#039;);\nINSERT test_set(a) VALUES(&#039;C,F,A&#039;);\nINSERT test_set(a) VALUES(&#039;C,F,A,H&#039;);\nINSERT test_set(a) VALUES(2);\n<\/code><\/pre>\n<h2>\u6d4b\u8bd5 TIME \u7c7b\u578b<\/h2>\n<pre class=\"prettyprint linenums\" ><code>-- HH:MM:SS [D HH:MM:SS] D \u8868\u793a\u5929\u6570 0~34\n-- \u6d4b\u8bd5 TIME \u7c7b\u578b\nCREATE TABLE test_time(\na TIME\n);\nINSERT test_time(a) VALUES(&#039;12:23:45&#039;);\nINSERT test_time(a) VALUES(&#039;2 12:23:45&#039;);&lt;!--2 \u5929 48 \u5c0f\u65f6--&gt;\nINSERT test_time(a) VALUES(&#039;22:22&#039;);&lt;!--22:22:00--&gt;\nINSERT test_time(a) VALUES(&#039;22&#039;);&lt;!--00:00:22--&gt;\nINSERT test_time(a) VALUES(&#039;2 22&#039;);&lt;!--70:00:00--&gt;\n-- HHMMSS\nINSERT test_time(a) VALUES(&#039;121212&#039;);\nINSERT test_time(a) VALUES(&#039;0&#039;);\nINSERT test_time(a) VALUES(0);\nINSERT test_time(a) VALUES(&#039;787878&#039;);\nINSERT test_time(a) VALUES(NOW());\nINSERT test_time(a) VALUES(CURRENT_TIME);\n-- \u6d4b\u8bd5 DATE \u7c7b\u578b YYYY-MM-DD YYYYMMDD\nCREATE TABLE test_date(\n    a DATE\n);\nINSERT test_date(a) VALUES(&#039;2017-03-04&#039;);\nINSERT test_date(a) VALUES(&#039;2017-2-13&#039;);\nINSERT test_date(a) VALUES(&#039;4007-03-23&#039;);\nINSERT test_date(a) VALUES(&#039;40071212&#039;);\nINSERT test_date(a) VALUES(&#039;4007@12@12&#039;);\nINSERT test_date(a) VALUES(&#039;4008#4#13&#039;);\nINSERT test_date(a) VALUES(&#039;4009.8.14&#039;);\n-- YY-MM-DD YYMMDD\n-- 70~99 \u8f6c\u6362\u6210 1970~1999  00~69 \u8f6c\u6362 2000~2069\nINSERT test_date(a) VALUES(&#039;780902&#039;);\nINSERT test_date(a) VALUES(&#039;650902&#039;);\nINSERT test_date(a) VALUES(&#039;880902&#039;);\nINSERT test_date(a) VALUES(NOW());\nINSERT test_date(a) VALUES(CURRENT_DATE);\n-- \u6d4b\u8bd5 DATETIME\nCREATE TABLE test_datetime(\na DATETIME\n);\nINSERT test_datetime(a) VALUES(&#039;1004-09-12 13:24:56&#039;);\nINSERT test_datetime(a) VALUES(&#039;720305121212&#039;);&lt;!--1972-03-05 12:12:12--&gt;\nINSERT test_datetime(a) VALUES(NOW());\nINSERT test_datetime(a) VALUES(DATETIME);\n-- \u6d4b\u8bd5 TIMESTAMP\nCREATE TABLE test_timestamp(\n    a TIMESTAMP\n);\nINSERT test_timestamp(a) VALUES(&#039;1978-10-23 12:12:12&#039;);\n-- \u63d2\u5165 CURRENT_TIMESTAMP\nINSERT test_timestamp VALUES(CURRENT_TIMESTAMP);\n-- \u63d2\u5165 NULL\nINSERT test_timestamp VALUES(NULL);\n-- \u4ec0\u4e48\u4e5f\u4e0d\u5199 \u5f97\u5230\u5f53\u524d\u7cfb\u7edf\u65e5\u671f\u548c\u65f6\u95f4\nINSERT test_timestamp VALUES();\n-- \u6d4b\u8bd5 YEAR\nCREATE TABLE test_year(\n    a YEAR\n);\nINSERT test_year(a) VALUES(1901);\n-- 00~69 2000~2069 70~99 1970~1999\n-- 0 \u63d2\u5165\u7684\u7ed3\u679c\u662f 0000\n-- &#039;0&#039; \u63d2\u5165\u7684\u7ed3\u679c\u662f 2000<\/code><\/pre>\n<h2>\u6d4b\u8bd5\u4e3b\u952e\u548c\u81ea\u589e<\/h2>\n<pre class=\"prettyprint linenums\" ><code>-- \u6d4b\u8bd5\u4e3b\u952e\nCREATE TABLE test_primary_key(\n    id INT UNSIGNED PRIMARY KEY,\n    username VARCHAR(20)\n);\nINSERT test_primary_key(id,username) VALUES(1,&#039;king&#039;);\nINSERT test_primary_key(id,username) VALUES(1,&#039;king123&#039;);&lt;!--\u4e3b\u952e\u552f\u4e00\u6027 --&gt;\nINSERT test_primary_key(username) VALUES(&#039;QUEEN&#039;);\nSELECT * FROM test_primary_key;\nCREATE TABLE test_primary_key1(\n    id INT UNSIGNED KEY,\n    username VARCHAR(20)\n);\nCREATE TABLE test_primary_key2(\n    id INT UNSIGNED,\n    username VARCHAR(20),\n    PRIMARY KEY(id)\n);\n-- CREATE TABLE test_primary_key3(\n--     id INT UNSIGNED PRIMARY KEY,\n--     courseId INT UNSIGNED PRIMARY KEY,\n--     username VARCHAR(20),\n--     email VARCHAR(50)\n-- );\n-- \u590d\u5408\u4e3b\u952e\nCREATE TABLE test_primary_key3(\n    id INT UNSIGNED,\n    courseId VARCHAR(20),\n    username VARCHAR(20),\n    email VARCHAR(50),\n    PRIMARY KEY(id,courseId)\n);\n-- 1-a \u590d\u5408\u4e3b\u952e\nINSERT test_primary_key3(id,courseId,username,email)\nVALUES(1,&#039;a&#039;,&#039;king&#039;,&#039;382771946@qq.com&#039;);\nINSERT test_primary_key3(id,courseId,username,email)\nVALUES(1,&#039;b&#039;,&#039;king&#039;,&#039;382771946@qq.com&#039;);\nINSERT test_primary_key3(id,courseId,username,email)\nVALUES(2,&#039;a&#039;,&#039;king&#039;,&#039;382771946@qq.com&#039;);\nINSERT test_primary_key3(id,courseId,username,email)\nVALUES(1,&#039;a&#039;,&#039;1king&#039;,&#039;1382771946@qq.com&#039;);\n-- \u6d4b\u8bd5 AUTO_INCREMENT\nCREATE TABLE test_auto_increment(\nid INT UNSIGNED KEY AUTO_INCREMENT,\nusername VARCHAR(20)\n);\nINSERT test_auto_increment(username) VALUES(&#039;A&#039;);-- 1A 2B 3C 4E 5F\nINSERT test_auto_increment(username) VALUES(&#039;B&#039;);\nINSERT test_auto_increment(username) VALUES(&#039;C&#039;);\nINSERT test_auto_increment(id,username) VALUES(NULL,&#039;E&#039;);\nINSERT test_auto_increment(id,username) VALUES(DEFAULT,&#039;F&#039;);\nINSERT test_auto_increment(id,username) VALUES(15,&#039;G&#039;);-- 15 G<\/code><\/pre>\n<h2>\u6d4b\u8bd5\u5176\u4ed6\u7ea6\u675f\u6761\u4ef6<\/h2>\n<pre class=\"prettyprint linenums\" ><code>mysql -root -p\nSHOW DATABASES;\nuse imooc;\n-- \u6d4b\u8bd5\u975e\u7a7a\nCREATE TABLE test_not_null(\na varchar(20),\nb varchar(20) not null\n);\nINSERT test_not_null(a,b) VALUES(&#039;&#039;,&#039;&#039;);\nINSERT test_not_null(a,b) VALUES(NULL,NULL);\nINSERT test_not_null(a,b) VALUES(NULL,&#039;abc&#039;);\nINSERT test_not_null(a) VALUES(&#039;TEST&#039;);--\u4e0d\u80fd\u7a7a \uff0cNULL\nselect * from test_not_null;\n-- \u6d4b\u8bd5\u9ed8\u8ba4\u503c\nCREATE TABLE test_default(\nid INT UNSIGNED AUTO_INCREMENT KEY,\nusername VARCHAR(20) NOT NULL,\nage TINYINT UNSIGNED DEFAULT 18,\nemail VARCHAR(50) NOT NULL DEFAULT &#039;382771946@qq.com&#039;\n);\nINSERT test_default(username) VALUES(&#039;A&#039;);\nINSERT test_default(username,age,email) VALUES(&#039;B&#039;,30,&#039;imooc@qq.com&#039;);\nINSERT test_default(username,age,email) VALUES(&#039;C&#039;,NULL,&#039;imooc@qq.com&#039;);\nINSERT test_default(username,age,email) VALUES(&#039;D&#039;,NULL,NULL);\nINSERT test_default(username,age,email) VALUES(&#039;D&#039;,NULL,DEFAULT);-- DEFAULT \u9ed8\u8ba4\u503c\n-- \u679a\u4e3e\nCREATE TABLE test_default1(\nid INT UNSIGNED AUTO_INCREMENT KEY,\nsex ENUM(&#039;a&#039;,&#039;b&#039;,&#039;c&#039;) NOT NULL DEFAULT &#039;a&#039;\n);\nINSERT test_default1(sex) VALUES(DEFAULT);\nselect * from test_default1;\nINSERT test_default1(id) VALUES(2);\n-- \u6d4b\u8bd5 UNIQUE KEY\nCREATE TABLE test_unique(\nid INT UNSIGNED AUTO_INCREMENT KEY,\nusername VARCHAR(20) NOT NULL UNIQUE KEY,\nemail VARCHAR(50) UNIQUE,\ncard CHAR(18) UNIQUE\n);\nINSERT test_unique(username,email,card) VALUES(&#039;A&#039;,&#039;A@QQ.COM&#039;,&#039;1&#039;);\nINSERT test_unique(username,email,card) VALUES(&#039;A&#039;,&#039;1A@QQ.COM&#039;,&#039;12&#039;);\nINSERT test_unique(username,email,card) VALUES(&#039;B&#039;,NULL,NULL);\nINSERT test_unique(username,email,card) VALUES(&#039;C&#039;,NULL,NULL);<\/code><\/pre>\n<h2>\u5b8c\u5584\u6155\u8bfe\u7f51\u7528\u6237\u8868\u7684\u521b\u5efa<\/h2>\n<pre class=\"prettyprint linenums\" ><code>-- \u7528\u6237\u8868 imooc_user\nCREATE TABLE IF NOT EXISTS `imooc_user`(\n`id` INT UNSIGNED AUTO_INCREMENT KEY COMMENT &#039;\u7528\u6237\u7f16\u53f7&#039;,\n`username` VARCHAR(20) NOT NULL UNIQUE COMMENT &#039;\u7528\u6237\u540d&#039;,\n`password` CHAR(32) NOT NULL COMMENT &#039;\u5bc6\u7801&#039;,\n`email` VARCHAR(50) NOT NULL UNIQUE COMMENT &#039;\u90ae\u7bb1&#039;,\n`age` TINYINT UNSIGNED NOT NULL DEFAULT 18 COMMENT &#039;\u5e74\u9f84&#039;,\n`sex` ENUM(&#039;\u7537&#039;,&#039;\u5973&#039;,&#039;\u4fdd\u5bc6&#039;) NOT NULL DEFAULT &#039;\u4fdd\u5bc6&#039; COMMENT &#039;\u6027\u522b&#039;,\n`tel` CHAR(11) NOT NULL UNIQUE COMMENT &#039;\u7535\u8bdd&#039;,\n`addr` VARCHAR(50) NOT NULL DEFAULT &#039;\u5317\u4eac&#039; COMMENT &#039;\u5730\u5740&#039;,\n`card` CHAR(18) NOT NULL UNIQUE COMMENT &#039;\u8eab\u4efd\u8bc1\u53f7&#039;,\n`married` TINYINT(1) NOT NULL DEFAULT 0 COMMENT &#039;0 \u4ee3\u8868\u672a\u7ed3\u5a5a\uff0c1 \u4ee3\u8868\u5df2\u7ed3\u5a5a&#039;,\n`salary` FLOAT(8,2) NOT NULL DEFAULT 0 COMMENT &#039;\u85aa\u6c34&#039;\n)ENGINE=INNODB DEFAULT CHARSET=UTF8;\nSHOW TABLES;\nDROP TABLE IF EXISTS imooc_user;\nDESC imooc_user;\nSHOW CREATE TABLE imooc_user;\n-- \u6d4b\u8bd5\u5e03\u5c14\u7c7b\u578b\nCREATE TABLE test_bool(\nid int,\nmarried BOOL\n);\nCREATE TABLE test_bool1(\nid int,\nmarried BOOLEAN\n);<\/code><\/pre>\n<ul>\n<li>\u5047\u8bbe\u6211\u4eec\u5728\u5efa\u8868\u65f6\u9700\u8981\u5b9a\u4e49\u4e00\u4e2a\u5217\u540d\u4e3a\u5e74\u7ea7 grade \u7684\u5217\uff0c\u8981\u6c42\u5b57\u6bb5\u503c\u4ece one\u3001two\u3001three \u4e2d\u9009\u62e9\u4e00\u9879\uff0c\u9ed8\u8ba4\u503c\u4e3a one\uff0c\u5219\u4e0b\u5217\u64cd\u4f5c\u8bed\u53e5\u6b63\u786e\u7684\u662f<br \/>\ngrade ENUM(\u2018one\u2019,\u2019two\u2019,\u2019three\u2019)  DEFAULT \u2018one\u2019<\/li>\n<li>\u82e5\u5728\u6570\u636e\u8868\u4e2d\u9700\u8981\u521b\u5efa\u5217 score \u7528\u6765\u5b58\u50a8\u67d0\u4e2a\u73ed\u5b66\u751f\u7684\u8003\u8bd5\u6210\u7ee9\uff080~100 \u5206\uff0c\u6ca1\u6709\u5c0f\u6570\uff09\uff0c\u90a3\u7528\u4e0b\u9762\u54ea\u79cd\u6570\u636e\u7c7b\u578b\u6700\u8282\u7701\u7a7a\u95f4\u3010 TINYINT\u3011<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u6570\u636e\u5e93\u7b80\u4ecb\u53ca\u5b89\u88c5 MySQL \u5c5e\u4e8e\u5173\u7cfb\u578b\u6570\u636e\u5e93 MySQL \u662f\u6309\u7167\u6570\u636e\u7ed3\u6784\u6765\u7ec4\u7ec7\u3001\u5b58\u50a8\u548c\u7ba1\u7406\u6570\u636e\u7684\u4ed3\u5e93 \u767b\u5f55\uff1a [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-1378","post","type-post","status-publish","format-standard","hentry","category-mysql"],"_links":{"self":[{"href":"https:\/\/blog.odjbinail.cn\/index.php?rest_route=\/wp\/v2\/posts\/1378","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.odjbinail.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.odjbinail.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.odjbinail.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.odjbinail.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1378"}],"version-history":[{"count":0,"href":"https:\/\/blog.odjbinail.cn\/index.php?rest_route=\/wp\/v2\/posts\/1378\/revisions"}],"wp:attachment":[{"href":"https:\/\/blog.odjbinail.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1378"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.odjbinail.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1378"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.odjbinail.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1378"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}