在MySQL中删除tablename.columnname = value的记录
要以所需方式删除记录，语法如下：
delete from yourTableName where yourTableName .yourColumnName=yourValue;
让我们首先创建一个表-
mysql> create table DemoTable ( StudentName varchar(100), StudentAge int );
使用插入命令在表中插入一些记录-
mysql> insert into DemoTable values('Chris',21);
mysql> insert into DemoTable values('Robert',20);
mysql> insert into DemoTable values('David',22);
mysql> insert into DemoTable values('Mike',24);
mysql> insert into DemoTable values('Sam',19);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-
+-------------+------------+ | StudentName | StudentAge | +-------------+------------+ | Chris | 21 | | Robert | 20 | | David | 22 | | Mike | 24 | | Sam | 19 | +-------------+------------+ 5 rows in set (0.00 sec)
这是如何使用tablename.columnname=value获取值并将其删除的方法-
mysql> delete from DemoTable where DemoTable.StudentName='Robert';
让我们再次检查表记录-
mysql> select *from DemoTable;
这将产生以下输出-
+-------------+------------+ | StudentName | StudentAge | +-------------+------------+ | Chris | 21 | | David | 22 | | Mike | 24 | | Sam | 19 | +-------------+------------+ 4 rows in set (0.00 sec)
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