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在LIMIT表达式中使用变量的存储过程？

2024-04-22 02:26:05 393

让我们先创建一张桌子

mysql> create table LimitWithStoredProcedure
   -> (
   -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,
   -> Name varchar(10)
   -> );

使用insert命令在表中插入一些记录。

查询如下

mysql> insert into LimitWithStoredProcedure(Name) values('John');
mysql> insert into LimitWithStoredProcedure(Name) values('Chris');
mysql> insert into LimitWithStoredProcedure(Name) values('Maxwell');
mysql> insert into LimitWithStoredProcedure(Name) values('Bob');
mysql> insert into LimitWithStoredProcedure(Name) values('David');
mysql> insert into LimitWithStoredProcedure(Name) values('Carol');
mysql> insert into LimitWithStoredProcedure(Name) values('James');
mysql> insert into LimitWithStoredProcedure(Name) values('Jace');
mysql> insert into LimitWithStoredProcedure(Name) values('Robert');
mysql> insert into LimitWithStoredProcedure(Name) values('Mike');
mysql> insert into LimitWithStoredProcedure(Name) values('Sam');
mysql> insert into LimitWithStoredProcedure(Name) values('Peter');
mysql> insert into LimitWithStoredProcedure(Name) values('Ramit');
mysql> insert into LimitWithStoredProcedure(Name) values('Tony');

使用select语句显示表中的所有记录。

查询如下

mysql> select *from LimitWithStoredProcedure;

以下是输出

+----+---------+
| Id | Name    |
+----+---------+
| 1  | John    |
| 2  | Chris   |
| 3  | Maxwell |
| 4  | Bob     |
| 5  | David   |
| 6  | Carol   |
| 7  | James   |
| 8  | Jace    |
| 9  | Robert  |
| 10 | Mike    |
| 11 | Sam     |
| 12 | Peter   |
| 13 | Ramit   |
| 14 | Tony    |
+----+---------+
14 rows in set (0.00 sec)

这是您的存储过程，在LIMIT表达式中使用变量

mysql> DELIMITER //
mysql> CREATE PROCEDURE Sp_limit(IN beg INTEGER, IN end INTEGER )
   -> BEGIN
      -> PREPARE myStatement FROM
      -> "select *from LimitWithStoredProcedure LIMIT ?,? ";
      -> SET @beginning = beg;
      -> SET @ending = end ;
      -> EXECUTE myStatement USING @beginning, @ending;
      -> DEALLOCATE PREPARE myStatement;
   -> END //
mysql> DELIMITER ;

借助CALL命令调用存储过程。

查询如下

mysql> call Sp_limit(4,7);

以下是输出

+----+--------+
| Id | Name   |
+----+--------+
| 5  | David  |
| 6  | Carol  |
| 7  | James  |
| 8  | Jace   |
| 9  | Robert |
| 10 | Mike   |
| 11 | Sam    |
+----+--------+
7 rows in set (0.00 sec)

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在LIMIT表达式中使用变量的存储过程？

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