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MySQL-01——数据库、表、数据相关操作
阅读量:208 次
发布时间:2019-02-28

本文共 670 字,大约阅读时间需要 2 分钟。

MySQL-01——数据库、表、数据相关操作

数据库相关

  • show databases;
  • create database db1 character set utf8/gbk;
  • show create database db1;
  • drop database db1;
  • use db1;

表相关

  • create table t1(name varchar(10) , age int )engine=myisam/innodb charset=utf8/gbk;
  • show tables;
  • show create table t1;
  • desc t1;
  • drop table t1;
  • rename table t1 to t2;
  • alter table t1 engine=mysiam/ innodb charset=utf8/gbk;
  • alter table t1 add字段名 类型 first/after xxx;
  • alter table t1 drop字段名;
  • alter table t1 change 原名 新名 新类型;
  • alter table t1 modify 字段名 新类型 first/after xxx;

数据相关

  • insert into t1 (name, age) values('小明',28),('小花',38);
  • select name,age from t1 where id<10;
  • update t1 set age=50 where id=5;
  • delete from t1 where age<30;

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