创建表
create table 表名
create table if not exists 表名
| mysql> create database company;Query OK, 1 row affected (0.00 sec)mysql> use company;Database changedmysql> create table if not exists t_dept( -> deptno int, -> dname varchar(20), -> loc varchar(40));Query OK, 0 rows affected (0.20 sec)mysql> show tables;+-------------------+| Tables_in_company |+-------------------+| t_dept |+-------------------+1 row in set (0.00 sec)mysql> |
显示当前库下的所有表
show tables;
| mysql> show tables;+-------------------+| Tables_in_company |+-------------------+| t_dept |+-------------------+1 row in set (0.00 sec) |
查看表的结构
describe 表名
简写
desc 表名
| mysql> describe t_dept;+--------+-------------+------+-----+---------+-------+| Field | Type | Null | Key | Default | Extra |+--------+-------------+------+-----+---------+-------+| deptno | int(11) | YES | | NULL | || dname | varchar(20) | YES | | NULL | || loc | varchar(40) | YES | | NULL | |+--------+-------------+------+-----+---------+-------+3 rows in set (0.00 sec)mysql> desc t_dept;+--------+-------------+------+-----+---------+-------+| Field | Type | Null | Key | Default | Extra |+--------+-------------+------+-----+---------+-------+| deptno | int(11) | YES | | NULL | || dname | varchar(20) | YES | | NULL | || loc | varchar(40) | YES | | NULL | |+--------+-------------+------+-----+---------+-------+3 rows in set (0.00 sec) |
查看表的详细
show create table 表名
| mysql> show create table t_dept;+--------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------+| Table | Create Table |+--------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------+| t_dept | CREATE TABLE `t_dept` ( `deptno` int(11) DEFAULT NULL, `dname` varchar(20) DEFAULT NULL, `loc` varchar(40) DEFAULT NULL) ENGINE=InnoDB DEFAULT CHARSET=utf8 |+--------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------+1 row in set (0.00 sec)show create table t_dept /Gmysql> show create table t_dept /G*************************** 1. row *************************** Table: t_deptCreate Table: CREATE TABLE `t_dept` ( `deptno` int(11) DEFAULT NULL, `dname` varchar(20) DEFAULT NULL, `loc` varchar(40) DEFAULT NULL) ENGINE=InnoDB DEFAULT CHARSET=utf81 row in set (0.00 sec) |
