Question

OFFSET FETCH不支持与TOP (n) WITH TIES选项的逻辑等效，它通过返回所有关系来确保确定性。

是否有任何解决方法可以将OFFSET FETCH和WITH TIES放在一起？

使用示例数据创建语句

CREATE TABLE #tbl(Id INT, Name VARCHAR(10))

INSERT #tbl
    SELECT 1, 'a' UNION ALL
    SELECT 1, 'a' UNION ALL
    SELECT 2, 'b' UNION ALL
    SELECT 2, 'b' UNION ALL
    SELECT 2, 'b' UNION ALL
    SELECT 3, 'c' UNION ALL
    SELECT 3, 'c' UNION ALL
    SELECT 3, 'c'

热门

SELECT TOP 3 * FROM #tbl ORDER BY Id

Id  Name
1   a
1   a
2   b

TOP n WITH TIES

SELECT TOP 3 WITH TIES * FROM #tbl ORDER BY Id

Id  Name
1   a
1   a
2   b
2   b
2   b

OFFSET FETCH

SELECT *
FROM #tbl
ORDER BY Id
OFFSET 0 ROWS
FETCH NEXT 3 ROWS ONLY

Id  Name
1   a
1   a
2   b

可能我们需要使用Ranking函数来实现这个目标吗？

Answer 1

只需在CTE内部使用它们而不使用FETCH语句

;WITH cte AS
 (
  SELECT Id, Name
  FROM #tbl
  ORDER BY Id
  OFFSET 0 ROWS
  )
  SELECT TOP 3 WITH TIES *
  FROM cte
  ORDER BY Id

请参阅SQLFiddle

偏移3 SQLFiddle

的示例

;WITH cte AS
 (
  SELECT Id, Name
  FROM #tbl
  ORDER BY Id
  OFFSET 3 ROWS
  )
  SELECT TOP 3 WITH TIES *
  FROM cte
  ORDER BY Id

Answer 2

SELECT *
FROM #tbl
ORDER BY Id
OFFSET 0 ROWS
FETCH NEXT 3 ROWS WITH TIES

如何将OFFSET / FETCH和WITH TIES放在一起？

2 个答案: