mysqldump -u [username] –p[password] –all-database > [all_dbs_dump_file.sql] MySQL-DELECT语句 功能介绍:从表中删除数据。 MySQL-DELECT语法: DELETE FROM table_name WHERE condition; 第一,指定删除数据的表(table_name)。 第二,使用条件来指定要在WHERE子句中删除的行记录。如果行匹配条件,这些行记...
truncate:执行速度较快,因为它一次性删除所有数据,过释放表的存储空间来删除数据,并将表重置为初始状态。 delete:执行速度较慢,因为它需要逐行删除数据,并且会生成大量的事务日志,同时也不释放空间。 drop:执行速度较快,因为它一次性删除整个表。 回滚能力: truncate:不可回滚,一旦执行,数据将被永久删除、无法恢复。
}# 连接到数据库connection = pymysql.connect(**db_config)try:withconnection.cursor()ascursor:# 查询所有表名cursor.execute("SHOW TABLES") tables = [row[0]forrowincursor.fetchall()]# 遍历每个表并执行TRUNCATE TABLE命令fortableintables: cursor.execute(f"TRUNCATE TABLE{table}")print(f"Truncated ...
MySQL 8.4 Reference Manual / ... / Delete Tables 22.4.4.4 Delete Tables You can use the delete() method to remove some or all records from a table in a database. The X DevAPI provides additional methods to use with the delete()
SELECTtable_nameFROMinformation_schema.tablesWHEREtable_schema=db_name; Afterwards, copy all of the tables in the result from the above query and delete them one by one. DROPTABLEIFEXISTStableOne;DROPTABLEIFEXISTStableTwo;DROPTABLEIFEXISTStableThree;DROPTABLEIFEXISTStableEtc; ...
show tables; 3、 显示数据表的结构: describe 表名; 4、 建库与删库: create database 库名; drop database 库名; 5、 建表: use 库名; create table 表名(字段列表); drop table 表名; 6、 清空表中记录: delete from 表名; 7、 显示表中的记录: ...
mysqldump -u [username] –p[password] –all-database > [all_dbs_dump_file.sql] 1. 2. 3. 4. 5. MySQL-DELECT语句 功能介绍:从表中删除数据。 MySQL-DELECT语法: DELETE FROM table_name WHERE condition; 1. 2. 3. 4. 第一,指定删除数据的表(table_name)。
mysql -u root -p db_name < ./temp.sql 3. Using TablePlus GUI Tool: Connect to the target database Select all tables from the left sidebar Right-click and choose delete, or simply hit delete button PressCmd + Sto commit changes to the server ...
: localhost User: root1 Select_priv: N Insert_priv: N Update_priv: N Delete_priv: N Create_priv: N Drop_priv: N Reload_priv: N Shutdown_priv: N ... 1 row in set ( sec) ###赋予root1账号所有权限 mysql> grant all privileges on *.* to 'root1'@'localhost' with grantoption;...
22.3.4.4 Delete Tables You can use the delete() method to remove some or all records from a table in a database. The X DevAPI provides additional methods to use with the delete() method to filter and order the records to be deleted. ...