SQL复制一行然后更新

Question

我需要创建一行的副本，然后更新它。

  NAME      LOCATION    FLAG
  ====      ========    ====
  name1     location1    0
  name2     location2    0

首先我必须选择NAME = name1和LOCATION = location1的行并创建重复行，然后使用新值更新NAME列。

我可以按

选择行

select NAME,LOCATION,FLAG from TABLE where NAME=name1 and LOCATION=location1

所以结果应该是

  NAME      LOCATION    FLAG
  ====      ========    ====
  name1     location1    0
  name2     location2    0
  name3     location1    0

Answer 1

您可以直接插入您的选择，只需选择新名称作为名称列的值

INSERT INTO TABLE (Name, Location, Flag) 
    select "New Name",LOCATION,FLAG from TABLE where NAME=name1 and LOCATION=location1