获取和偏移后的UNION SELECT

Question

我有以下存储过程：

@offset INT,
@fetch INT

SELECT col1 AS col FROM tab1
UNION
SELECT col1 FROM tab2
ORDER BY col OFFSET @offset ROWS FETCH NEXT @fetch ROWS ONLY

现在我想在执行offset和fetch之后添加第三个表作为UNION。这可能吗？

UNION
SELECT TOP 1 col1 FROM tab3
ORDER BY NEWID() 

Answer 1

使用派生表

$oldFunction

注意：如果您不想删除结果中的重复项，则可以将Select col from ( SELECT col1 AS col FROM tab1 UNION SELECT col1 FROM tab2 ORDER BY col OFFSET @offset ROWS FETCH NEXT @fetch ROWS ONLY ) a UNION SELECT TOP 1 col1 FROM tab3 ORDER BY NEWID() 替换为UNION。

Answer 2

@offset INT,
@fetch INT

WITH CTE1
AS
(SELECT TOP 100 PERCENT col1 AS col FROM tab1
UNION
SELECT TOP 100 PERCENT col1 FROM tab2
ORDER BY col OFFSET @offset ROWS FETCH NEXT @fetch ROWS ONLY)

SELECT * FROM CTE1
UNION
SELECT TOP 1 col1 FROM tab3
ORDER BY NEWID()