sql从某不连续的数字中将其分段并找出缺失的数字并分段

• 首先做准备数据

  CREATE TABLE #tempsource(col NVARCHAR(100))

 INSERT INTO #tempsource (col) VALUES('')
 INSERT INTO #tempsource (col) VALUES('')
 INSERT INTO #tempsource (col) VALUES('')
 INSERT INTO #tempsource (col) VALUES('')
 INSERT INTO #tempsource (col) VALUES('')
 INSERT INTO #tempsource (col) VALUES('')
 INSERT INTO #tempsource (col) VALUES('')
 INSERT INTO #tempsource (col) VALUES('')
 INSERT INTO #tempsource (col) VALUES('')
 INSERT INTO #tempsource (col) VALUES('')
 INSERT INTO #tempsource (col) VALUES('')
 INSERT INTO #tempsource (col) VALUES('')
 INSERT INTO #tempsource (col) VALUES('')
 INSERT INTO #tempsource (col) VALUES('')
 INSERT INTO #tempsource (col) VALUES('')
 INSERT INTO #tempsource (col) VALUES('')

• 将数据转换成应该处理的数据格式

CREATE TABLE #temp(name NVARCHAR(50),colValue INT )  

 INSERT INTO #temp  SELECT LEFT(col,6) AS name ,SUBSTRING(col,7,LEN(col)) FROM #tempsource

• 将数据进行排序分组

  select v1.colValue, (v1.colValue - v1.rownum) as delta  ,v1.name   INTO #tempSort
    from
    (
         select Row_Number() OVER (ORDER BY  name,colValue) as rownum,colValue ,name
         from #temp
    ) v1  

• 找出连续的数字并分组

SELECT v2.name,delta,MIN(v2.colValue) as StartNum, max(v2.colValue) as EndNum,
max(v2.colValue)-min(v2.colValue)+1 as Count,ROW_NUMBER() OVER( ORDER BY v2.delta ASC ) AS rownum
INTO #tempContinuity
from #tempSort  v2
--WHERE v2.colValue >=2
group by v2.name,v2.delta
 ORDER BY StartNum

• 跟据连续的信息找出不连续的数字并分组

SELECT tlx1.name,tlx1.EndNum+1 LostStartNum,tlx2.StartNum-1 AS LostEndNum,tlx2.StartNum-1 -(tlx1.EndNum+1)+1 LostCount
INTO #tempLost
FROM #tempContinuity AS tlx1
LEFT JOIN #tempContinuity AS tlx2  ON tlx1.rownum+1 = tlx2.rownum AND tlx2.name = tlx1.name
WHERE tlx2.StartNum IS NOT NULL
ORDER BY tlx1.delta

• 将取得的信息进行组装成源格式进行显示

SELECT name +RIGHT(''+ CAST(StartNum AS NVARCHAR),5) AS StartNum ,name +RIGHT(''+ CAST(EndNum AS NVARCHAR),5) AS EndNum,Count FROM  #tempContinuity
SELECT name +RIGHT(''+ CAST(LostStartNum AS NVARCHAR),5) AS LostStartNum ,name +RIGHT(''+ CAST(LostEndNum AS NVARCHAR),5) AS LostEndNum,LostCount FROM  #tempLost

• 使用ForXml将其分组合并成一行

    SELECT name,STUFF((SELECT name +RIGHT(''+ CAST(StartNum AS NVARCHAR),5) +'-'+name +RIGHT(''+ CAST(EndNum AS NVARCHAR),5)+'|'+CAST(t.Count AS NVARCHAR) +';' FROM  #tempContinuity AS t WHERE t.name =v.name FOR XML PATH ('')),1,0,'') AS strCard
    FROM #tempContinuity AS v
    GROUP BY v.name