[英]How to use MERGE SQL-Statement to insert new values
我有2張桌子:
A:
----------
Key | Value | PK_A
B:
-----------
Key | Value
如何在表B中的表A中插入新的(鍵,值),僅在表B中。 我試過使用MERGE,但我不確定如何使用新的主鍵PK_A
MERGE INTO A
USING (SELECT key, value FROM B)
ON (A.Key = B.key AND A.value = B.value)
WHEN NOT MATCHED THEN INSERT (D.key, D.value, ???) VALUES (B.key, B.value, ???);
創建一個序列來填充PK_A。
CREATE SEQUENCE PK_A_SEQ;
然后,
MERGE INTO A
USING (SELECT key, value FROM B)
ON (A.Key = B.key AND A.value = B.value)
WHEN NOT MATCHED THEN INSERT (D.key, D.value, D.PK_A) VALUES (B.key, B.value, PK_A_SEQ.NEXTVAL);
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