如何编写一个 MySQL 查询,为多个输入显示一个值?


为此,请使用 BETWEEN 关键字。我们首先创建一个表 -

mysql> create table DemoTable1537
   -> (
   -> StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY,
   -> StudentName varchar(20)
   -> );
Query OK, 0 rows affected (0.72 sec)

使用 insert 命令在表中插入一些记录 -

mysql> insert into DemoTable1537(StudentName) values('Chris');
Query OK, 1 row affected (0.13 sec)
mysql> insert into DemoTable1537(StudentName) values('Bob');
Query OK, 1 row affected (0.11 sec)
mysql> insert into DemoTable1537(StudentName) values('Sam');
Query OK, 1 row affected (0.10 sec)
mysql> insert into DemoTable1537(StudentName) values('Mike');
Query OK, 1 row affected (0.16 sec)
mysql> insert into DemoTable1537(StudentName) values('David');
Query OK, 1 row affected (0.10 sec)
mysql> insert into DemoTable1537(StudentName) values('John');
Query OK, 1 row affected (0.14 sec)
mysql> insert into DemoTable1537(StudentName) values('Carol');
Query OK, 1 row affected (0.12 sec)

使用 select 语句从表中显示所有记录 -

mysql> select * from DemoTable1537;

这将产生以下输出 -

+-----------+-------------+
| StudentId | StudentName |
+-----------+-------------+
|         1 | Chris       |
|         2 | Bob         |
|         3 | Sam         |
|         4 | Mike        |
|         5 | David       |
|         6 | John        |
|         7 | Carol       |
+-----------+-------------+
7 rows in set (0.00 sec)

以下是为多个输入显示值的查询 -

mysql> select StudentName from DemoTable1537 where StudentId between 3 and 6;

这将产生以下输出 -

+-------------+
| StudentName |
+-------------+
| Sam         |
| Mike        |
| David       |
| John        |
+-------------+
4 rows in set (0.00 sec)

更新于:12-Dec-2019

265 个浏览量

开启你的职业生涯

通过完成课程来获得认证

开始学习
广告