Sql 提取和偏移后的并集选择

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，我想在执行偏移量和提取之后，添加第三个表作为UNION。可能吗

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

使用派生表

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() 

注意：如果您不想删除结果中的重复项，则可以将

UNION

替换为

UNION ALL

使用派生表

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() 

@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() 

注意：如果您不想删除结果中的重复项，则可以将

UNION

替换为

UNION ALL

@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()