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In the SQL statement, the as statement can have the same name as the front field.

Source: Internet
Author: User
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  • In the SQL statement, the as statement can have the same name as the front field.
In the SQL statement, the as statement can be the same as the preceding field:
Select *, CaseMycolumnnameWhen '0' then' outbound 'when' 1 'then' inbound 'endMycolumnname
From mytablename
It turns out that the name can be duplicated. If you run the preceding statement in the query analyzer, you will find that both of the fields are in the column.
Some people may have known it for a long time, but it was the first time I met it.

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