使用MySQL创建存储过程并设置显示指定数量记录的限制

首先我们创建一个表 –

mysql> create table DemoTable1368
    -> (
    -> ClientId int,
    -> ClientName varchar(20)
    -> );
Query OK, 0 rows affected (0.58 sec)

使用insert命令向表中插入一些记录 –

mysql> insert into DemoTable1368 values(101,'Adam');
Query OK, 1 row affected (0.17 sec)
mysql> insert into DemoTable1368 values(102,'Bob');
Query OK, 1 row affected (0.10 sec)
mysql> insert into DemoTable1368 values(103,'John');
Query OK, 1 row affected (0.13 sec)
mysql> insert into DemoTable1368 values(104,'Sam');
Query OK, 1 row affected (0.18 sec)
mysql> insert into DemoTable1368 values(105,'Mike');
Query OK, 1 row affected (0.16 sec)
mysql> insert into DemoTable1368 values(106,'Carol');
Query OK, 1 row affected (0.11 sec)

使用select语句显示表中的所有记录 –

mysql> select * from DemoTable1368;

输出如下 –

+----------+------------+
| ClientId | ClientName |
+----------+------------+
|      101 | Adam       |
|      102 | Bob        |
|      103 | John       |
|      104 | Sam        |
|      105 | Mike       |
|      106 | Carol      |
+----------+------------+
6 rows in set (0.00 sec)

以下是创建存储过程并使用MySQL LIMIT限制显示记录数的查询 –

mysql> DELIMITER //
mysql> CREATE PROCEDURE limit_Demo(IN limitValue int)
    -> BEGIN
    -> DECLARE limValue int;
    -> SET limValue =limitValue ;
    -> SELECT * FROM DemoTable1368 LIMIT limValue;
    -> END
    -> //
Query OK, 0 rows affected (0.17 sec)
mysql> DELIMITER ;

现在您可以使用call命令调用存储过程 –

mysql> CALL limit_Demo(3);

输出如下 –

+----------+------------+
| ClientId | ClientName |
+----------+------------+
|      101 | Adam       |
|      102 | Bob        |
|      103 | John       |
+----------+------------+
3 rows in set (0.00 sec)
Query OK, 0 rows affected (0.03 sec)

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