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mysql -h10.20.66.32 -uroot -p123456 |
-h后面是mysqlServer所在地址,-u后面是用户名,-p后面是密码
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show databases; |
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use test; |
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show tables; |
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desc winton |
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create table t1( id int not null primary key, name char(20) not null ); |
语法 create table 表名称( 字段名 字段名类型 字段描述符,字段名 字段类型 字段描述符);
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alter table t1 add(score int not null ); |
语法:alter table 表明称 add(字段名 类型 描述符);
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alter table t1 drop column score; |
语法:alter table 表名 drop colunm 字段名,drop colunm 字段名;
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alter table t1 change name score int not null ; |
语法:alter table 表名 change 旧字段名 新字段名 新字段描述符
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insert into winton values(001, ‘zww‘ ),(002, ‘rs‘ ); |
语法:insert into 表名 values(字段1值,字段2值,……),(字段1值,字段2值,……);
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insert into winton(id) values(004); |
查看插如后的结果,如上图所示。
语法:insert inton 表名(字段名) values(值一),(值二);
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select * from t1; |
语法:select * from 表名;
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select id from t1; |
语法:select 字段一,字段二 from 表名;
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select t1.id,t1.score,winton.name from t1,winton; |
语法:select 表一字段,表二字段,表三字段,…… from 表一,表二,表三,……;
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select * from t1 where socre>90; |
语法:select 字段1,字段2 from 表名 where 条件;
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select t1.id,t1.score,winton.name from t1,winton where t1.id=winton.id; |
语法:select 表一字段,表二字段 from 表一,表二 where 条件;
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select name from winton where id=(select id from t1 where score=90); |
语法:select 字段一,字段二…… from 表名 where 条件(查询);
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(select id from t1 )union(select id from winton); |
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select id from t1 where id in (select id from winton); |
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delete from winton where id=4; |
语法:delete from 表名 where 条件;
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update t1 set score=69 where id=2; |
语法:update 表名 set 更改的字段名=值 where 条件;
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select sum(score) from t1; |
注:sum(字段) 对字符串和时间无效
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select avg(score) from t1; |
注:avg(字段)对字符串和时间无效
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select count(*) from t1; |
注:count(字段名)不包含NULL;
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select max(name) from winton; |
注:max(colunm)返回字母序最大的,返回数值最大的
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select min(name) from winton; |
注:min(colunm)返回字母序最小值,返回数值最小值
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select distinct name from winton; |
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select * from winton limit 2; |
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select * from winton order by name; |
注:默认是升序
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slelect * from winton order by name desc; |
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select * from winton order by name asc; |
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select name from winton group by name; |
恩,基本能想起来的就值么多了,都是最基础,最常用的一些。
原文出处:http://blog.csdn.net/wenwen091100304/article/details/49368019
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原文地址:http://www.cnblogs.com/chenhaosuibi/p/5076147.html