如何在MySQL中删除值大于特定值的字段?
让我们首先创建一个表-
mysql> create table DemoTable(
Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,
PlayerName varchar(100),
PlayerScore int
);
使用插入命令在表中插入一些记录-
mysql> insert into DemoTable(PlayerName,PlayerScore) values('Chris',780);mysql> insert into DemoTable(PlayerName,PlayerScore) values('Sam',1100);
mysql> insert into DemoTable(PlayerName,PlayerScore) values('Mike',900);
mysql> insert into DemoTable(PlayerName,PlayerScore) values('Bob',890);
mysql> insert into DemoTable(PlayerName,PlayerScore) values('Carol',1000);
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-
+----+------------+-------------+| Id | PlayerName | PlayerScore |
+----+------------+-------------+
| 1 | Chris | 780 |
| 2 | Sam | 1100 |
| 3 | Mike | 900 |
| 4 | Bob | 890 |
| 5 | Carol | 1000 |
+----+------------+-------------+
5 rows in set (0.00 sec)
以下是删除值大于MySQL中特定值的字段的查询-
mysql> delete from DemoTable where PlayerScore > 900;
让我们再次检查表记录。
mysql> select *from DemoTable;
这将产生以下输出-
+----+------------+-------------+| Id | PlayerName | PlayerScore |
+----+------------+-------------+
| 1 | Chris | 780 |
| 3 | Mike | 900 |
| 4 | Bob | 890 |
+----+------------+-------------+
3 rows in set (0.00 sec)
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