本节讲解命令行操作MySQL数据库:
# 登录MySQL数据库:
$ mysql -u[用户名] -p[密码]
如:
$ mysql -uroot -p111111
# 查看已有数据库:
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| appinfodb |
| mybatis |
| mysql |
| newsmanagement |
| performance_schema |
| sakila |
| ssm |
| sys |
| world |
+--------------------+
# 指明使用某数据库
mysql> use ssm;
Database changed
# 显示数据表
mysql> show tables;
+---------------+
| Tables_in_ssm |
+---------------+
| t_user |
+---------------+
# 查看数据表结构
mysql> desc t_user;
+----------+--------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+----------+--------------+------+-----+---------+-------+
| username | varchar(255) | NO | PRI | NULL | |
| password | varchar(255) | YES | | NULL | |
+----------+--------------+------+-----+---------+-------+
# 查看记录
mysql> select * from t_user (where [字段名]=[值]);
+----------+----------+
| username | password |
+----------+----------+
| jensen | 521 |
| ryan | 521 |
| zsh | 521 |
+----------+----------+
3 rows in set (0.00 sec)
# 插入记录
mysql> INSERT INTO t_user VALUE ('FD','521');
Query OK, 1 row affected (0.01 sec)
mysql> select * from t_user;
+----------+----------+
| username | password |
+----------+----------+
| FD | 521 |
| jensen | 521 |
| ryan | 521 |
| zsh | 521 |
+----------+----------+
4 rows in set (0.00 sec)
# 创建数据表