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从MySQL获取三个具有更高价值的记录

2024-05-14 04:40:05 340

让我们首先创建一个表-

mysql> create table DemoTable1614
   -> (
   -> StudentName varchar(20),
   -> StudentScore int
   -> );

使用插入命令在表中插入一些记录-

mysql> insert into DemoTable1614 values('Adam',65);
mysql> insert into DemoTable1614 values('Chris',89);
mysql> insert into DemoTable1614 values('Bob',58);
mysql> insert into DemoTable1614 values('Sam',98);
mysql> insert into DemoTable1614 values('Mike',87);
mysql> insert into DemoTable1614 values('Carol',79);

使用select语句显示表中的所有记录-

mysql> select * from DemoTable1614;

这将产生以下输出

+-------------+--------------+
| StudentName | StudentScore |
+-------------+--------------+
| Adam        |           65 |
| Chris       |           89 |
| Bob         |           58 |
| Sam         |           98 |
| Mike        |           87 |
| Carol       |           79 |
+-------------+--------------+
6 rows in set (0.00 sec)

这是查询以获得3个具有较高值的记录-

mysql> select * from DemoTable1614 order by StudentScore DESC LIMIT 3;

这将产生以下输出

+-------------+--------------+

| StudentName | StudentScore |
+-------------+--------------+
| Sam         |           98 |
| Chris       |           89 |
| Mike        |           87 |
+-------------+--------------+
3 rows in set (0.00 sec)

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从MySQL获取三个具有更高价值的记录

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