MySQL 如何删除值大于特定值的字段

首先让我们创建一个表:

mysql> create table DemoTable
(
   Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,
   PlayerName varchar(100),
   PlayerScore int
);
Query OK，0 rows affected (0.97 sec)

使用insert命令向表中插入一些记录 –

mysql> insert into DemoTable(PlayerName,PlayerScore) values('Chris',780);
Query OK，1 row affected (0.25 sec)
mysql> insert into DemoTable(PlayerName,PlayerScore) values('Sam',1100);
Query OK，1 row affected (0.23 sec)
mysql> insert into DemoTable(PlayerName,PlayerScore) values('Mike',900);
Query OK，1 row affected (0.13 sec)
mysql> insert into DemoTable(PlayerName,PlayerScore) values('Bob',890);
Query OK，1 row affected (0.15 sec)
mysql> insert into DemoTable(PlayerName,PlayerScore) values('Carol',1000);
Query OK，1 row affected (0.20 sec)

使用select语句显示表中的所有记录 –

mysql> select * from DemoTable;

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)

以下是在MySQL中删除大于特定值的字段的查询 –

mysql> delete from DemoTable where PlayerScore > 900;
Query OK，2 rows affected (0.18 sec)

让我们再次检查表记录。

mysql> select * from DemoTable;

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)