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MySQL过程与SELECT一起返回整个表

2024-05-18 19:03:06 386

让我们首先创建一个表-

create table DemoTable1971
   (
   StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY,
   StudentName varchar(20),
   StudentPassword int
   );

使用插入命令在表中插入一些记录-

insert into DemoTable1971(StudentName,StudentPassword) values('John','123456');
insert into DemoTable1971(StudentName,StudentPassword) values('Chris','123456');
insert into DemoTable1971(StudentName,StudentPassword) values('David','123456');
insert into DemoTable1971(StudentName,StudentPassword) values('Mike','123456');

使用select语句显示表中的所有记录-

select * from DemoTable1971;

这将产生以下输出-

+-----------+-------------+-----------------+
| StudentId | StudentName | StudentPassword |
+-----------+-------------+-----------------+
|         1 | John        |          123456 |
|         2 | Chris       |          123456 |
|         3 | David       |          123456 |
|         4 | Mike        |          123456 |
+-----------+-------------+-----------------+
4 rows in set (0.00 sec)

这是创建存储过程的查询-

delimiter //
create procedure returnAll(pass varchar(30))
   begin
   select * from DemoTable1971 where StudentPassword=pass;
   end
   //
delimiter ;

现在您可以使用CALL命令调用存储过程-

call returnAll('123456');

这将产生以下显示整个表的输出-

+-----------+-------------+-----------------+
| StudentId | StudentName | StudentPassword |
+-----------+-------------+-----------------+
|         1 | John        |          123456 |
|         2 | Chris       |          123456 |
|         3 | David       |          123456 |
|         4 | Mike        |          123456 |
+-----------+-------------+-----------------+
4 rows in set (0.00 sec)

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MySQL过程与SELECT一起返回整个表

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