MySQL在存储过程中调用函数时抛出错误

我的mysql存储过程有一些问题，mysql总是显示错误1064，错误mysql语法。我哪里错了

   DELIMITER $$

   USE `itin`$$

   DROP PROCEDURE IF EXISTS `sp_Transaction`$$

   CREATE DEFINER=`root`@`localhost` PROCEDURE `sp_Transaction`(IN inpt TINYINT(4), IN inpt2 TINYINT(4))
   BEGIN

   IF((inpt = 0) AND (inpt2 = 0)) THEN  
   SELECT idtr_inventory, showStatus(idms_status) AS idms_status, showLocation(idms_location) AS idms_location
, showUnitType(idms_unittype) AS idms_unittype, USER, user_email
, showDepartment(idms_department) AS idms_department, asset_tag, sn, brand, model, showBBUser(bb_user) AS bbUser
, dt_purchase, warranty, dt_warranty_exp, nm_computer, ip_address, remarks
   FROM tr_inventory;

 ELSE IF(inpt = 0) THEN
 SELECT idtr_inventory, showStatus(idms_status) AS idms_status, showLocation(idms_location) AS idms_location
, showUnitType(idms_unittype) AS idms_unittype, USER, user_email
, showDepartment(idms_department) AS idms_department, asset_tag, sn, brand, model, showBBUser(bb_user) AS bbUser
, dt_purchase, warranty, dt_warranty_exp, nm_computer, ip_address, remarks
 FROM tr_inventory WHERE (idms_location = inpt2);

ELSE IF(inpt2 = 0) THEN
SELECT idtr_inventory, showStatus(idms_status) AS idms_status, showLocation(idms_location) AS idms_location
, showUnitType(idms_unittype) AS idms_unittype, USER, user_email
, showDepartment(idms_department) AS idms_department, asset_tag, sn, brand, model, showBBUser(bb_user) AS bbUser
, dt_purchase, warranty, dt_warranty_exp, nm_computer, ip_address, remarks
FROM tr_inventory WHERE (idms_unittype = inpt)

ELSE 
SELECT idtr_inventory, showStatus(idms_status) AS idms_status, showLocation(idms_location) AS idms_location
, showUnitType(idms_unittype) AS idms_unittype, USER, user_email
, showDepartment(idms_department) AS idms_department, asset_tag, sn, brand, model, showBBUser(bb_user) AS bbUser
, dt_purchase, warranty, dt_warranty_exp, nm_computer, ip_address, remarks
FROM tr_inventory WHERE (idms_unittype = inpt) AND (idms_location = inpt2);

END IF;
END IF;
END IF;

END$$

DELIMITER ;

最后的if语句是否错误？如果是，我需要放置在哪里？谢谢

错误： 查询：创建定义器=

root

@

localhost

过程

sp\u事务

（在inpt tinyint（4）中，在inpt2 tinyint（4）中）如果（（inpt=0）和。。。 错误代码：1064

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您的SQL语法有错误；请查看与您的MySQL服务器版本对应的手册，以了解在“else”附近使用的正确语法。您错过了一个

；

...
FROM tr_inventory WHERE (idms_unittype = inpt);
                                              ^------here
ELSE 
...

---

你错过了一个

；

...
FROM tr_inventory WHERE (idms_unittype = inpt);
                                              ^------here
ELSE 
...

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我们无法识别哪个ELSE是针对哪个IF的。请添加完整的错误消息我们无法识别哪个ELSE是针对哪个IF的。请添加完整的错误消息