1
我有表的表和行像下面在創建動態查詢存儲過程的MySQL
CREATE TABLE Areas(AreaName VARCHAR(255),
PinCode VARCHAR(255))
INSERT INTO Areas(AreaName, PinCode)
VALUES('Teynampet', '6000018'),
('Ramapuram', '6000089'),
('TNagar', '6000017'),
('Mylapore', '6000014'),
('Gopalapuram', '6000087')
我寫了一個SQL過程如下
DROP PROCEDURE IF EXISTS mp_test;
CREATE PROCEDURE mp_test(IN pArea VARCHAR(255))
BEGIN
SET @Query = 'SELECT PinCode FROM Areas';
IF pArea != ''
THEN
SET @City = CONCAT(' WHERE AreaName = ', pArea);
END IF;
SET @Query = CONCAT(@Query, @City);
PREPARE stmt FROM @Query;
EXECUTE stmt;
END
當我打電話給程序
CALL mp_test('Teynampet');
當我執行我沒有得到期望的結果即是600018
如何建立動態查詢在SP
感謝您的幫助
感謝您的回覆我將使用Null – user1093513