根据MySQL中的条件仅删除表中的某些行
让我们首先创建一个表-
create table DemoTable -> ( -> Id int, -> Name varchar(20) -> );
使用insert命令在表中插入一些记录：
Insert some records in the table using insert command: insert into DemoTable values(100,'Bob'); insert into DemoTable values(101,'Chris'); insert into DemoTable values(102,'David'); insert into DemoTable values(103,'Sam'); insert into DemoTable values(104,'Carol');
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 | Name | +------+-------+ | 100 | Bob | | 101 | Chris | | 102 | David | | 103 | Sam | | 104 | Carol | +------+-------+ 5 rows in set (0.00 sec)
以下是从表中仅删除有限行的查询-
delete from DemoTable -> where Id > 102;
让我们再次检查表记录-
select *from DemoTable;
这将产生以下输出-
+------+-------+ | Id | Name | +------+-------+ | 100 | Bob | | 101 | Chris | | 102 | David | +------+-------+ 3 rows in set (0.00 sec)