Question

我有三张桌子。

members并且它有一个名为blocked，ID和primaryPhone的可空列。
blockedinfo它有2列info和type。
phoneNumbers它有ID，prefix，phoneNumber，memberID

我正在尝试在members表上创建一个触发器，以便在我在members表中设置阻塞字段时将用户主要电话号码插入blockedinfo表。当我将blockedinfo字段设置为blocked

NULL

CREATE TRIGGER `members.before_update` BEFORE UPDATE ON  `members` FOR EACH ROW BEGIN 
IF( NEW.`blocked` IS NOT NULL ) THEN 
INSERT INTO  `blockedinfo` ( phone,  'userPhoneNumberValue') 
SELECT CONCAT(  `prefix` ,  `phoneNumber` ) AS  'phone' 
FROM  `phonenumbers` 
WHERE  `ID` = NEW.`primaryPhone` 
AND  `memberID` = NEW.`ID` 
LIMIT 1 ;
ELSE 
DELETE FROM  `blockedinfo` WHERE  `info` IN (
SELECT CONCAT(  `prefix` ,  `phoneNumber` ) 
FROM  `phonenumbers` 
WHERE  `ID` = NEW.`primaryPhone` 
AND  `memberID` = NEW.`ID`);
END IF ;

END ;

尝试构建触发器时出现此错误

以下查询失败：“CREATE DEFINER = root @ 127.0.0.1 TRIGGER members.before_update在更新members之前，每行开始MySQL said: #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 ''phoneNumberValue') SELECT CONCAT(前缀{{ 1}} phoneNumber`）第4行的“电话”

Answer 1

首先，在这部分

INSERT INTO  `blockedinfo` ( phone,  'userPhoneNumberValue') 
SELECT CONCAT(  `prefix` ,  `phoneNumber` ) AS  'phone' 
FROM  `phonenumbers`

您提供了一个字符串文字“userPhoneNumberValue”，其中应在“blockedinfo”中提供列名。为此处定位的目标命名。

INSERT INTO `blockedinfo` (info, type)

在这部分

SELECT CONCAT(  `prefix` ,  `phoneNumber` ) AS  'phone'

你提供一个价值。你需要提供两个。我猜你需要更像这样的东西。

SELECT CONCAT(`prefix`, `phoneNumber`) AS phone, 'userPhoneNumberValue'

Answer 2

INSERT INTO  `blockedinfo` ( phone,  `phoneNumber`) 
SELECT CONCAT(  `prefix` ,  `phoneNumber` ) AS  `phone`

在这里，您尝试插入2个值，但您的选择仅返回1

尝试：

INSERT INTO  `blockedinfo` ( phone,  `phoneNumber`) 
SELECT CONCAT(  `prefix` ,  `phoneNumber` ) AS  `phone`, `phoneNumber`
FROM  `phonenumbers` 
WHERE  `ID` = NEW.`primaryPhone` 
AND  `memberID` = NEW.`ID` 
LIMIT 1 ;

sql在更新时创建触发器

2 个答案: