SQL ORDER BY (sequence) [duplicate]

问题

This question already has answers here:

sql ORDER BY multiple values in specific order? (8 answers)

Closed 5 years ago.

I have a sql statement which I would want to ORDER BY a specific sequence.

SELECT * FROM UserDB ORDER BY [Role]

How can I make it such that the data brought to my GridView table is listed from Admin on the top, follow by User and Guests?

回答1:

So you want to order by Admin/User/Guest?

Try something like :

SELECT * 
FROM UserDB 
ORDER BY
  CASE Role WHEN 'Admin' THEN 0 
            WHEN 'User' THEN 1
            WHEN 'Guest' THEN 2
  END

Does that work for you?

Another option would be to have (or add) a column Sequence to your Role table so you could define the sequence in the table itself - and then just to an ORDER BY Role.Sequence.

回答2:

This is substantively identical to the question " sql ORDER BY multiple values in specific order? " and I strongly recommend you look at the solutions presented there.

来源：https://stackoverflow.com/questions/8471539/sql-order-by-sequence