存储过程：如果/如果其他情况下多个查询

Question

BEGIN CASE assetTypeNo 
WHEN 0 THEN 
( 
SELECT * 
FROM 
books 
) 
WHEN 1 
THEN 
SELECT * 
FROM magazines 
END; 
END 

在mySQL.Is中创建存储过程这可能吗？如果是这样。请帮忙。我无法在任何地方找到答案。

Answer 1

试试这个，

DELIMITER $$ 
CREATE PROCEDURE ProcName 
BEGIN 
IF assetTypeNo = 0 THEN 
    SELECT * 
    FROM ; 
ELSEIF assetTypeNo = 1 THEN 
    SELECT * 
    FROM magazines 
END; 
END $$ 
DELIMITER ; 

Answer 2

的语法是不正确的。试试这个脚本 -

BEGIN 

    CASE assetTypeNo 
    WHEN 0 THEN 
    SELECT * FROM books; 
    WHEN 1 THEN 
    SELECT * FROM magazines; 
    END CASE; 

END 

Answer 3

试试这个。这应该工作。

CREATE DEFINER = 'root'@'%' PROCEDURE `test_proc`(
     IN assetTypeNo INTEGER(11) 
    ) 
    NOT DETERMINISTIC 
    CONTAINS SQL 
    SQL SECURITY DEFINER 
    COMMENT '' 
BEGIN 

    CASE assetTypeNo 
     WHEN 0 THEN SELECT * FROM `books`; 
     WHEN 1 THEN SELECT * FROM `magazines` ; 
     ELSE 
     BEGIN 
     END; 
    END CASE; 

END;