如何从具有重复记录的MySQL表中删除单个值？

2024-04-28 14:31:04 450

语法

delete from yourTableName where yourColumnName=yourValue limit 1;

让我们首先创建一个表-

mysql> create table DemoTable -> ( -> Amount int -> );

使用插入命令在表中插入一些记录-

mysql> insert into DemoTable values(50); mysql> insert into DemoTable values(100); mysql> insert into DemoTable values(50); mysql> insert into DemoTable values(70); mysql> insert into DemoTable values(90); mysql> insert into DemoTable values(50);

使用select语句显示表中的所有记录-

mysql> select *from DemoTable;

这将产生以下输出-

+--------+ | Amount | +--------+ | 50 | | 100 | | 50 | | 70 | | 90 | | 50 | +--------+ 6 rows in set (0.00 sec)

这是从表中删除单个值的查询-

mysql> delete from DemoTable where Amount=50 limit 1;

让我们再次检查表记录-

mysql> select *from DemoTable;

这将产生以下输出-

+--------+ | Amount | +--------+ | 100 | | 50 | | 70 | | 90 | | 50 | +--------+ 5 rows in set (0.00 sec)

如何从具有重复记录的MySQL表中删除单个值？

语法

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