mysql常用操作

-- 查看当前数据库

mysql> SELECT DATABASE();
+------------+
| DATABASE() |
+------------+
| mydb       |
+------------+
1 row in set (0.00 sec)

-- 显示当前时间、用户名、数据库版本

mysql> SELECT now(), user(), version();
+---------------------+----------------+-----------+
| now()               | user()         | version() |
+---------------------+----------------+-----------+
| 2019-01-03 15:54:47 | root@localhost | 5.7.24    |
+---------------------+----------------+-----------+
1 row in set (0.00 sec)

-- 查看已有库

mysql> SHOW DATABASES;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mydb               |
| mysql              |
| performance_schema |
| sys                |
+--------------------+
5 rows in set (0.00 sec)

-- 查看当前库信息

mysql> SHOW CREATE DATABASE mydb;
+----------+-----------------------------------------------------------------+
| Database | Create Database                                                 |
+----------+-----------------------------------------------------------------+
| mydb     | CREATE DATABASE `mydb` /*!40100 DEFAULT CHARACTER SET latin1 */ |
+----------+-----------------------------------------------------------------+
1 row in set (0.00 sec)

-- 删除库

mysql> drop database mytest;
Query OK, 0 rows affected (0.00 sec)

 启动方式一：

mysqld_safe --secure-file-priv= --user=mysql &

启动方式二：

/etc/init.d/mysqld start
/etc/init.d/mysqld stop

启动方式三：

service mysqld start
service mysqld stop