基于ID列表的SQL LOOP INSERT [英] SQL LOOP INSERT Based on List of ID's

问题描述

嘿，我有SQL writer块.所以这是我基于伪代码要做的事情

Hey I have SQL writers block. So here is what I'm trying to do based on pseudo-code

int[] ids = SELECT id FROM (table1) WHERE idType = 1 -> Selecting a bunch of record ids to work with
FOR(int i = 0; i <= ids.Count(); ++i) -> loop through based on number of records retrieved
{
    INSERT INTO (table2)[col1,col2,col3] SELECT col1, col2, col3 FROM (table1)
    WHERE col1 = ids[i].Value AND idType = 1 -> Inserting into table based on one of the ids in the array

    // More inserts based on Array ID's here
}

这是我要实现的一种想法，我知道SQL中不可能使用数组，但在这里列出了它来解释我的目标.

This is sort of the idea I'm trying to achieve, I understand that arrays are not possible in SQL but I've listed it here to explain my goal.

推荐答案

这就是您要的内容.

declare @IDList table (ID int)

insert into @IDList
SELECT id
FROM table1
WHERE idType = 1

declare @i int
select @i = min(ID) from @IDList
while @i is not null
begin
  INSERT INTO table2(col1,col2,col3) 
  SELECT col1, col2, col3
  FROM table1
  WHERE col1 = @i AND idType = 1

  select @i = min(ID) from @IDList where ID > @i
end

但是，如果这是您要在循环中执行的全部操作，则应改用Barry的答案.

But if this is all you are going to do in the loop you should really use the answer from Barry instead.

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