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VerySource»Forum › Database › MS-SQL Server › I want to combine columns a, b, and c into a single ...

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I want to combine columns a, b, and c into a single column.

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Post time: 2020-2-22 02:30:02
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I want to combine columns a, b, and c into a single column.

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我是杀人狂

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China

Post time: 2020-5-2 17:00:01
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select a from tablename
union all
select b as a from tablename
union all
select c as a from tablename

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China

Post time: 2020-5-2 18:45:02
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Use UNION (ALL)

SELECT A FROM ...
UNION ALL SELECT B FROM ...
UNION ALL SELECT C FROM ...

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China

Post time: 2020-5-2 20:00:01
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Ha ha. . Upstairs is really fast

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