在MySql存储过程中使用IF和Concat时卡住
我试图使用在MySql存储过程中使用IF和Concat时卡住,mysql,stored-procedures,Mysql,Stored Procedures,我试图使用IF以及MySql存储过程中的其他代码,但事情似乎不正常,我无法保存存储过程。如果我删除,如果一切正常,我就能保存存储过程 问题在于其中的IF。你能帮忙吗 错误 /* SQL Error (1064): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'IF FIND_
IF
以及MySql
存储过程中的其他代码,但事情似乎不正常,我无法保存存储过程。如果我删除,如果
一切正常,我就能保存存储过程
问题在于其中的IF
。你能帮忙吗
错误
/* SQL Error (1064): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'IF FIND_IN_SET (10,vals) THEN
'Grey Link'
ELSE
SET ret_val = 'Blue' at line 20 */
存储过程
BEGIN
DECLARE vals VARCHAR(2400);
DECLARE ret_val VARCHAR(2400);
select group_concat(elmAction) into vals from reports where id = this_id and userId = this_user;
SET ret_val = CASE this_id
WHEN 1 THEN CONCAT (
'Blue Type 1'
'Blue Type 2'
'Blue Type 3' #Here is where the problem is...
IF FIND_IN_SET (10,vals) THEN
'Grey Link'
ELSE
'Blue link'
END IF;
)
ELSE 'Error'
END;
RETURN (ret_val);
END
试试这个:
CONCAT (
'Blue Type 1',
'Blue Type 2',
'Blue Type 3',
IF( FIND_IN_SET (10,vals), 'Grey Link','Blue link')
)
使用案例
:
CONCAT (
'Blue Type 1',
'Blue Type 2',
'Blue Type 3',
CASE
WHEN FIND_IN_SET (10,vals) = 0 THEN 'Blue link'
WHEN FIND_IN_SET (10,vals) = 1 THEN ....
WHEN FIND_IN_SET (10,vals) = 2 THEN ....
ELSE
...
END
)
试试这个:
CONCAT (
'Blue Type 1',
'Blue Type 2',
'Blue Type 3',
IF( FIND_IN_SET (10,vals), 'Grey Link','Blue link')
)
使用案例
:
CONCAT (
'Blue Type 1',
'Blue Type 2',
'Blue Type 3',
CASE
WHEN FIND_IN_SET (10,vals) = 0 THEN 'Blue link'
WHEN FIND_IN_SET (10,vals) = 1 THEN ....
WHEN FIND_IN_SET (10,vals) = 2 THEN ....
ELSE
...
END
)
使用案例
SET ret_val = CASE this_id
WHEN 1 THEN CONCAT (
'Blue Type 1',
'Blue Type 2',
'Blue Type 3',
case when FIND_IN_SET (10,vals) THEN
'Grey Link'
ELSE
'Blue link'
END
)
使用案例
SET ret_val = CASE this_id
WHEN 1 THEN CONCAT (
'Blue Type 1',
'Blue Type 2',
'Blue Type 3',
case when FIND_IN_SET (10,vals) THEN
'Grey Link'
ELSE
'Blue link'
END
)
这是可行的,但现在唯一的问题是你已经更改了if语法,这不允许我添加更多的elseif
@Norman使用CASE
语句,就像juergen d
所建议的那样,但现在唯一的问题是你已经更改了if语法,这不允许我添加更多的elseif
@Norman使用CASE
语句,如juergen d