1

是否有任何 Oracle 函数表明记录的存在,或任何其他有用的技术来实现这一点?

编辑:使用我所做的 MERGE 语句:

MERGE
 INTO  lims_min.mytab src
 USING lims_min.mytab tgt
    ON (    src.col1 = tgt.col1
        AND tgt.col1 = p_val1
        AND src.col2 = tgt.col2
        AND tgt.col2 = p_val2
       )

 WHEN MATCHED
 THEN
 UPDATE
  SET tgt.col3=p_val3,
      tgt.col4=p_val4

 WHEN NOT MATCHED
 THEN
 INSERT  (col1, col2, col3, col4)
 VALUES  (val1, val2, val2, val4);

我收到错误消息说 col3 是无效标识符。没有拼写错误,它是现有的列。p_val1、p_val2、p_val3 和 p_val4 是传递给存储过程的字符串参数。我认为问题可能在于这些参数,也许它们应该放在 WHERE 语句中?有任何想法吗?

4

2 回答 2

4

您正在 Oracle 中寻找merge

MERGE
       INTO  target_table tgt
      USING source_table src
         ON  ( src.object_id = tgt.object_id ) //The key to check if the record exists
       WHEN MATCHED // if exists
       THEN
     UPDATE
        SET   tgt.object_name = src.object_name //update it
        ,     tgt.object_type = src.object_type
       WHEN NOT MATCHED                         // if not exists
       THEN
     INSERT ( tgt.object_id                    //then insert
            , tgt.object_name
            , tgt.object_type )
     VALUES ( src.object_id
            , src.object_name
            , src.object_type );
于 2011-01-21T23:40:26.440 回答
4

查看 MERGE 语句

http://psoug.org/reference/merge.html

于 2011-01-21T23:41:00.297 回答