java SQL合并以更新值或将值插入到同一个表中

Question

"MERGE INTO NT_PROPERTY ntProp USING ( "  +
                            "SELECT * FROM NT_PROPERTY ) " +
                            "VALUES " +
                                    "('minDPTObjectId'," + minDPTObjectId + ", 'Starting DPT Object Id') " +
                                    "('maxDPTObjectId', " + maxDPTObjectId + ", 'Ending DPT Object Id') " +
                            "vt (NAME, VALUE, NOTE) " +
                            "ON ( ntProp.NAME = vt.NAME ) " +
                            "WHEN MATCHED THEN " +
                            "UPDATE SET VALUE = vt.VALUE "+
                            "WHEN NOT MATCHED THEN " +
                            "INSERT (NAME, VALUE, NOTE) VALUES (vt.NAME, vt.VALUE, vt.NOTE)";

好吧，我得到了一个缺少关键字的错误，而且不知道究竟是什么，还有没有其他方法可以让它不那么笨拙

非常感谢您的帮助

Answer 1

问题是您的合并语法不正确。您的声明采用以下形式：

MERGE INTO nt_property ntprop
  USING (SELECT * FROM nt_property)
    VALUES (...)
    vt (...)
  ON (ntprop.name = vt.name)
WHEN MATCHED THEN
  UPDATE ...
WHEN NOT MATCHED THEN
  INSERT ...;

但它的形式应该是：

MERGE INTO target_table tgt_alias
  USING source_table_or_subquery src_alias
    ON (<JOIN conditions>)
WHEN MATCHED THEN
  UPDATE ...
WHEN NOT MATCHED THEN
  INSERT ...;

为什么在你的using和on子句之间有VALUES和vt子句？这是错误的语法。此外，虽然您可以在using子句中使用select * from tablename，但您可以直接使用tablename，因为您选择的是所有列和所有行

Answer 2

  MERGE INTO NT_PROPERTY D  
      USING (SELECT * FROM DUAL ) S  
      ON (D.NAME = 'minDPTObjectId')  
      WHEN MATCHED THEN UPDATE SET D.VALUE =   '1234' 
      WHEN NOT MATCHED THEN INSERT (NAME, VALUE, NOTE) 
      VALUES ('maxDPTObjectId', '1111', 'Ending DPT Object Id') ;