Oracle DB等效于重复密钥更新

Question

我需要在Oracle中执行以下MySQL查询:

INSERT INTO users VALUES(1,10) ON DUPLICATE KEY UPDATE points = 10;

除此之外还有其他什么merge吗？我只是不明白.

Answer 1

你需要使用一个MERGE.就像是

MERGE INTO users dest
  USING( SELECT 1 user_id, 10 points FROM dual) src
     ON( dest.user_id = src.user_id )
 WHEN MATCHED THEN
   UPDATE SET points = src.points
 WHEN NOT MATCHED THEN
   INSERT( user_id, points ) 
     VALUES( src.user_id, src.points );

Answer 2

如果你不想使用MERGE，你可以尝试：

begin
   INSERT INTO users VALUES(1,10);

   exception
      when dup_val_on_index then
         update users
            set points = 10
          where id = 1;
end;