importmysql.connector# 连接到MySQL数据库cnx=mysql.connector.connect(user='username',password='password',host='hostname',database='database_name')# 创建游标对象cursor=cnx.cursor()# 查询数据库中的所有表query="SHOW TABLES;"cursor.execute(query)# 获取查询结果tables=cursor.fetchall()# 打印结果forta...
password='password',host='hostname',database='database_name')# 获取游标cursor=cnx.cursor()# 获取所有表的名称query="SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA = 'database_name'"cursor.execute(query)tables=cursor.fetchall()# 循环查询每个表的数据行数fortableintables:tabl...
such as tables, indexes, or complete databases themselves. It permanently removes the specified object and all its associated data, and the action cannot be reverted. For example, to drop a table named “employees,” the following SQL query would...
与STRICT_ALL_TABLES不同,设置STRICT_TRANS_TABLES模式仅在事务表上执行更严格的检查,包括对插入和更新的数据类型和值的验证,而不影响往非事务型引擎中写入非法数据。 mysql> set sql_mode='STRICT_TRANS_TABLES'; Query OK, 0 rows affected, 1 warning (0.00 sec) mysql> insert into t_innodb values(10)...
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>MySql Query: SELECT TABLE_NAMEFROM INFORMATION_SCHEMA.TABLESWHERE TABLE_SCHEMA = 'test' Example OutPut:
25646 Query ROLLBACK TO SAVEPOINT sp 在搭配--single-transaction 参数后,会在FLUSH TABLES WITH READ LOCK 后添加START TRANSACTION 语句,用来开启单一事务, 这个时候的加锁,仅仅是为了确定master-data中的binlog的具体位置和开启事务,开启事务后,就已经把读锁释放了,而且在由日志可以看出,在日志的回滚过程中,是...
(0.04 sec) // 切换到root用户下对root1用户取消权限 mysql> revoke all privileges on *.* from oot1; Query OK, 0 rows affected(0.01 sec) ### 第二种方案:新用户账号下直接取消自己全部权限 mysql> revoke all privileges on *.* from root1; Query OK, 0 rows affected(0.01 sec) 11、...
truncate all tables?Posted by: Anti Body Date: August 27, 2008 08:43PM is there a query to do that? I can do this: SELECT table_name FROM INFORMATION_SCHEMA.tables WHERE table_schema = 'db_name' Can I then truncate each somehow?
SQL,指结构化查询语言,全称是 Structured Query Language,是一种 ANSI(American National Standards Institute 美国国家标准化组织)标准的计算机语言,可以让我们可以处理数据库。 SQL语句主要分为: DQL:数据查询语言,用于对数据进行查询,如select DML:数据操作语言,对数据进行增加、修改、删除,如insert、udpate、delete DD...