SQL Server：openquery插入链接服务器

Question

如何在不存在行的情况下将数据插入链接服务器（oracle）？

我要插入employee表，如果employeecode没有在该表中还不存在

INSERT INTO OPENQUERY(ORACLEX, 
    'SELECT EMPCODE, EMPNAME FROM AX.EMPLOYEE') -- I want a where clause here 

Select EID, ENAME FROM EMPDATA 

Answer 1

你实际上可能从表中读取两次

INSERT INTO OPENQUERY(ORACLEX, 
    'SELECT EMPCODE, EMPNAME FROM AX.EMPLOYEE') -- I want a where clause here 
    Select D.EID, D.ENAME 
    FROM EMPDATA D 
LEFT JOIN OPENQUERY(ORACLEX, 
    'SELECT EMPCODE, EMPNAME FROM AX.EMPLOYEE') OQ ON OQ.EMPCODE = D.EID 
    WHERE QQ.EMPCODE IS NULL;