SQl存儲過程不起作用

Question

我有一個無法正常運行的存儲過程：

CREATE DEFINER=`root`@`localhost` PROCEDURE `visitor_search`(
IN _startDate datetime,
IN _endDate datetime,
IN _visitorName text,
IN _personToVisit text
)
BEGIN
SELECT * FROM visitor
where
logged_in >= _startDate
and logged_in <= _endDate
and concat(firstname, "", lastname) like('%' + _visitorName + '%')
and person_to_visit like('%' + _personToVisit + '%')
order by logged_in desc;
END

我認為以下幾行正在發揮作用。

and concat(firstname, "", lastname) like('%' + _visitorName + '%')
and person_to_visit like('%' + _personToVisit + '%')

這是正確的語法嗎？

問候，

鮑勃

Answer 1

您也需要在那里使用CONCAT() 。

and concat(firstname, "", lastname) like concat('%', _visitorName, '%')
and person_to_visit like concat('%', _personToVisit, '%')

並且不要忘記使用其他定界符。

DELIMITER $$
CREATE DEFINER=`root`@`localhost` PROCEDURE `visitor_search`(
IN _startDate datetime,
IN _endDate datetime,
IN _visitorName text,
IN _personToVisit text
)
BEGIN
SELECT * FROM visitor
where
logged_in >= _startDate
and logged_in <= _endDate
and concat(firstname, "", lastname) like concat('%', _visitorName, '%')
and person_to_visit like concat('%', _personToVisit, '%')
order by logged_in desc;
END $$
DELIMITER ;

Answer 2

試試這個也許：

and concat(firstname, "", lastname) like concat('%' , _visitorName , '%')
and person_to_visit like concat('%' , _personToVisit , '%')

LIKE不是功能