从MySQL表中删除多个条目

要从MySQL表中删除多个条目，请使用JOIN。让我们首先创建一个表-

create table DemoTabl(Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, FirstName varchar(100));

使用插入命令在表中插入一些记录-

insert into DemoTable(FirstName) values(Chris); insert into DemoTable(FirstName) values(Bob); insert into DemoTable(FirstName) values(Mike); insert into DemoTable(FirstName) values(Adam); insert into DemoTable(FirstName) values(Bob); insert into DemoTable(FirstName) values(Adam); insert into DemoTable(FirstName) values(Bob); insert into DemoTable(FirstName) values(Mike);

使用select语句显示表中的所有记录-

select *from DemoTable;

这将产生以下输出-

+----+-----------+ | Id | FirstName | +----+-----------+ | 1 | Chris | | 2 | Bob | | 3 | Mike | | 4 | Adam | | 5 | Bob | | 6 | Adam | | 7 | Bob | | 8 | Mike | +----+-----------+ 8 rows in set (0.00 sec)

以下是删除多个条目的查询-

delete DemoTable from DemoTable join DemoTable tbl on DemoTable.FirstName= tbl.FirstName where tbl.FirstName = Bob;

让我们再次检查表记录-

select *from DemoTable;

这将产生以下输出-

+----+-----------+ | Id | FirstName | +----+-----------+ | 1 | Chris | | 3 | Mike | | 4 | Adam | | 6 | Adam | | 8 | Mike | +----+-----------+ 5 rows in set (0.00 sec)