SQL插入时不存在

我搜索了一会儿这个问题，但我解决不了的......SQL插入时不存在

我要检查，如果记录不以MySQL表存在，然后插入一条记录。

这里是我的代码：

IF NOT EXISTS (SELECT * FROM personOffice WHERE personID = 2 AND officeID = 1) 
    BEGIN 
     INSERT INTO personOffice (personID, officeID) VALUES ('2', (SELECT officeID FROM offices WHERE title = 'Berlin')) 
    END

Mysql的告诉我，那里有我的第一行语法错误。

感谢您的解决方案。

来源

2013-12-16 user2715505

见以前发布的答案：http://stackoverflow.com/questions/1361340/how-to-insert-if-not-exists-in-mysql –

INSERT INTO personOffice(personID, officeID) 
SELECT '2', (SELECT officeID FROM offices WHERE title = 'Berlin') FROM dual 
WHERE NOT EXISTS (SELECT * FROM personOffice WHERE personId = 2 AND officeID = 1)

来源

2013-12-16 17:25:47 usha

你可以试试这个：

INSERT INTO personOffice (personID, officeID) 
VALUES ('2', (SELECT officeID FROM offices WHERE title = 'Berlin')) 
WHERE NOT EXISTS (SELECT * FROM personOffice WHERE personID = 2 AND officeID = 1)

来源

2013-12-16 17:31:17

SQL插入时不存在

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