{"id":131,"title":"create\/show\/alter\/rename\/modify\/change\/desc\/drop","good":0,"bad":0,"hit":1885,"created_at":"2014-12-19 17:10:58","content":"

\u521b\u5efa\uff0ccreate table<\/p>

create table \u8868\u540d (<\/p>

\u5b57\u6bb5\u7684\u5b9a\u4e49<\/p>

) [\u8868\u9009\u9879];<\/p>

 <\/p>

\u5176\u4e2d\u8868\u540d\uff0c\u4e00\u5b9a\u5148\u8981\u786e\u5b9a\u6570\u636e\u5e93\uff01\u56e0\u6b64\u4e00\u4e2a\u5178\u578b\u7684\u8868\u540d\u662f\u7531\u4e24\u90e8\u5206\u7ec4\u6210\uff1a<\/p>

\u6240\u5728\u5e93.\u8868\u540d<\/p>

\u5982\uff1acreate table test.student;<\/p>

<\/p>

\u5982\u679c\u4e8b\u5148\u6307\u5b9a\u9ed8\u8ba4\u6570\u636e\u5e93\u5219\u4e0d\u7528\u5199\u6240\u5728\u5e93\uff0c\u5982\uff1a<\/p>

use test;<\/p>

create table student...<\/p>

<\/p>

\u67e5\u770b\u6240\u6709\u7684\u8868\u6709\u54ea\u4e9b<\/p>

show tables;<\/p>

\u6216<\/p>

show tables like \u2018dz_\u2019<\/p>

<\/p>

<\/p>

\u67e5\u770b\u5177\u4f53\u7684\u5efa\u8868\u8bed\u53e5<\/p>

show create table table_name;<\/p>

\u5728mysql\u7684\u547d\u4ee4\u884c\u5ba2\u6237\u7aef\uff0c\u5982\u679c\u6570\u636e\u8fc7\u591a\uff0c\u4e0d\u5bb9\u6613\u5c55\u793a\uff01<\/p>

\u53ef\u4ee5\u4f7f\u7528 G \u4f5c\u4e3a\u8bed\u53e5\u7ed3\u675f\u7b26\uff01<\/p>

show create table table_nameG;<\/p>

<\/p>

<\/p>

\u67e5\u8be2\u8868\u7ed3\u6784<\/p>

desc \u8868\u540d<\/p>

desc describe\u7684\u7b80\u5199<\/p>

<\/p>

<\/p>

\u4fee\u6539\u8868\u9009\u9879<\/p>

alter table table_name [\u65b0\u9009\u9879]<\/p>

\u5982\uff1aalter table student engine=myisam;<\/p>

<\/p>

\u6539\u8868\u540d<\/p>

rename table\u539f\u8868\u540d to \u65b0\u8868\u540d<\/p>

\u5982\uff1arename table student to student1;<\/p>

\u6ce8\u610f\uff0c\u8868\u540d\u53ef\u4ee5\u7531\u5e93\u540d.\u8868\u540d\u5f62\u5f0f\u7684\uff01<\/p>

\u56e0\u6b64\uff0c\u53ef\u4ee5\u8de8\u5e93\u4fee\u6539\u8868\u540d\uff1a\u53ea\u8981\u5728\u8868\u540d\u524d\u589e\u52a0\u5e93\u540d\u5373\u53ef<\/p>

<\/p>

\u4fee\u6539\u8868\u7ed3\u6784\uff0c\u8868\u5185\u5b57\u6bb5<\/p>

\u589e\u52a0\u5b57\u6bb5<\/p>

alter table table_name add column \u5b57\u6bb5\u5b9a\u4e49 [\u5b57\u6bb5\u4f4d\u7f6e]<\/p>

\u5b57\u6bb5\u4f4d\u7f6e\uff1afirst\/before\/after\u4f9d\u6b21\u6307\u5b9a\u5728\u6700\u524d\uff0c\u67d0\u5b57\u6bb5\u524d\uff0c\u67d0\u5b57\u6bb5\u540e<\/p>

\u5982\uff1aalter table student add isdel tinyint unsigned not null default 0 after id;<\/p>

<\/p>

\u5220\u9664\u5b57\u6bb5<\/p>

alter table table_name drop \u5217\u540d;<\/p>

alter table student drop isdel;<\/p>

<\/p>

\u4fee\u6539\u5df2\u6709\u5b57\u6bb5\uff08\u4fee\u6539\u5b57\u6bb5\u5b9a\u4e49\uff09<\/p>

alter table table_name modify columncolumn_name \u65b0\u7684\u5b9a\u4e49\uff01<\/p>

\u5982\uff1aalter table student modify isdel char(1);<\/p>

<\/p>

\u5b57\u6bb5\u6539\u540d<\/p>

alter table table_name change column \u539f\u5b57\u6bb5\u540d \u65b0\u5b57\u6bb5\u540d \u65b0\u5b57\u6bb5\u5b9a\u4e49\uff01<\/p>

\u6ce8\u610f\uff0c\u4e0d\u662f\u7eaf\u7cb9\u7684\u6539\u540d\uff0c\u800c\u662f\u9700\u8981\u5728\u4fee\u6539\u5b9a\u4e49\u7684\u540c\u65f6\u6539\u540d\uff01<\/p>

\u5982\uff1aalter table student change isdel isdel1 tinyint unsigned not null default 0;<\/p>

<\/p>

<\/p>

\u5220\u9664\uff0cdrop table<\/p>

drop table if exists<\/p>

create table if not exists!<\/p>"}