Question

我需要一个更新语句来解决SQL Server 2000上的表中重复的一些问题。表结构如下所示。此表中没有主键。我需要一个SQL语句，它会在有重复项的情况下通过向值添加5来更新值，直到不再有重复项为止。

DocNumber       SeQNumber
Doc001           900
Doc001           900
Doc001           900
Doc001           903
Doc001           904

期望的结果

DocNumber       SeqNUmber
Doc001           900
Doc001           905
Doc001           910
Doc001           903
Doc001           904

这是我尝试过的我的最新尝试如下所示。在那个例子中，我只是添加了计数器，但+5是我真正需要的。

Declare @count as integer = (SELECT COUNT(*) AS DUPLICATES
FROM            dbo.RM10101
GROUP BY DocNumbr, SeqNumbr
HAVING        (COUNT(*) > 1))


Declare @counter as integer =1
While @Counter < @count
begin
With UpdateData  As
(
SELECT  DocNumbr,SeqNumbr,
ROW_NUMBER() OVER (ORDER BY [SeqNumbr] DESC) AS RN
FROM RM10101
)
UPDATE  RM10101 SET SeqNumbr = (select max(SeqNumbr) from RM10101 where docNumbr =          RM10101.DocNumbr and SeqNumbr=RM10101.SeqNumbr) + (@counter)
FROM RM10101
INNER JOIN UpdateData ON RM10101.DocNumbr = UpdateData.DocNumbr 
where rn =@counter   
SET @counter = @counter + 1
end
end

非常感谢任何帮助谢谢，鲍勃

Answer 1

;with tb1(id, seqNUm, docNum) as (
SELECT  ROW_NUMBER() OVER (ORDER BY SeQNumber), DocNumber, SeQNumber From table1
)

update tb1 set docnum=201 where id=2

设置id要更新的行

Answer 2

这是一个开始，我很难将此选择查询转换为更新语句。

--Build your tally table and sample data

if object_id('dbo.tally') is not null 
        drop table dbo.tally

select top 11000 
    identity(int,1,1) as n
into tally
from master.dbo.syscolumns sc1,
    master.dbo.syscolumns sc2

create table #test_table (
    DocNumber varchar(100),
    SeqNumber int
)

insert into #test_table
select 'Doc001', 900 union all
select 'Doc001', 900 union all
select 'Doc001', 900 union all
select 'Doc001', 903 union all
select 'Doc001', 904

select 
    t1.DocNumber,
    t1.SeqNumber,
    NewSeqNumber =  t1.SeqNumber + (5 * (t.n - 1))
from (
    select
        *,
        c = count(*)
    from #test_table
    group by
        DocNumber, SeqNumber
)t1
inner join tally t
    on t.n <= t1.c

drop table #test_table

Answer 3

不好的情况是

（＆＃39; Doc001＆＃39;，900），（＆＃39; Doc001＆＃39;，900），（＆＃39; Doc001＆＃39;，900），（＆＃39; Doc001＆＃39; ;，903），（＆＃39; Doc001＆＃39;，904），（＆＃39; Doc001＆＃39;，905），（＆＃39; Doc001＆＃39;，905），（＆＃39; Doc001＆＃39;，905））（＆＃39; Doc001＆＃39;，910），（＆＃39; Doc001＆＃39;，910），（＆＃39; Doc001＆＃39;，915），（＆＃39; Doc001＆＃39;，915））

当你将行更新为900到905和910时，你就会遇到以前没有重复的情况。

要解决此问题，请使用以下查询：

WHILE EXISTS (SELECT * FROM Table1 GROUP BY DocNumber, SeqNumber HAVING count(*) > 1)
BEGIN

   With TableAdjusted as (
        select DocNumber, SeqNumber, row_number() over (partition by DocNumber, SeqNumber order by (select NULL)) RowID
        from Table1
   )

   update A
     set SeqNumber = (B.RowID - 1)*5 + B.SeqNumber
   from TableAdjusted A
   inner join TableAdjusted B
      on A.DocNumber = B.DocNumber and A.SeqNumber = B.SeqNumber and A.RowID = B.RowID 
   where A.RowID > 1
END

select * from Table1 order by DocNumber, SeqNumber

SQL Fiddle

Answer 4

如果我的序列如下，脚本可能会失败：（＆＃39; Doc001＆＃39;，900），（＆＃39; Doc001＆＃39;，900），（＆＃39; Doc001＆＃39;，900），（＆＃39; Doc001＆＃39;，903 ），（＆＃39; Doc001＆＃39;，904），（＆＃39; Doc001＆＃39;，905），（＆＃39; Doc001＆＃39;，905），（＆＃39; Doc001＆＃39; ，905），（＆＃39; Doc001＆＃39;，910），（＆＃39; Doc001＆＃39;，910），（＆＃39; Doc001＆＃39;，915），（＆＃39; Doc001＆＃ 39; 915）

该脚本将给出如下错误： Msg 512，Level 16，State 1，Line 1 子查询返回的值超过1。当子查询遵循=，！=，＆lt;，＆lt; =，＆gt;，＆gt; =或子查询用作表达式时，不允许这样做。

正确的脚本将是：

WHILE (SELECT SUM(X.A) FROM (  SELECT COUNT(*) A FROM Table_1 GROUP BY DocNumber, SeqNumber HAVING count(*) > 1) X) > 0
BEGIN
   With TableAdjusted as (
        select DocNumber, SeqNumber, row_number() over (partition by DocNumber, SeqNumber order by (select NULL)) RowID
        from Table_1
   )

   update A
     set SeqNumber = (B.RowID - 1)*5 + B.SeqNumber
   from TableAdjusted A
   inner join TableAdjusted B
      on A.DocNumber = B.DocNumber and A.SeqNumber = B.SeqNumber and A.RowID = B.RowID 
   where A.RowID > 1
END

在没有主键的情况下更新SQL Server中的重复项

4 个答案: