Mysql常用命令

1 查看当前会话隔离界别

mysql> select @@tx_isolation;
+-----------------+
| @@tx_isolation  |
+-----------------+
| REPEATABLE-READ |
+-----------------+
1 row in set (0.00 sec)

2 查看全局隔离级别

mysql> select @@global.tx_isolation;
+-----------------------+
| @@global.tx_isolation |
+-----------------------+
| SERIALIZABLE          |
+-----------------------+
1 row in set (0.00 sec)

3 设置全局隔离级别

mysql> set global tx_isolation = 'SERIALIZABLE';
Query OK, 0 rows affected (0.00 sec)

4 设置当前会话的隔离界别

mysql> set  tx_isolation = 'SERIALIZABLE';
Query OK, 0 rows affected (0.00 sec)

mysql> select @@tx_isolation;
+----------------+
| @@tx_isolation |
+----------------+
| SERIALIZABLE   |
+----------------+
1 row in set (0.00 sec)

5 系统变量符

格式：
会话级别的系统变量 @@name 或
全局级别的系统变量 @@global.name

比如查询binlog的类型

mysql> select @@binlog_format;
+-----------------+
| @@binlog_format |
+-----------------+
| STATEMENT       |
+-----------------+
1 row in set (0.00 sec)