MySQL row number

问题

Say I have a MySQL query, for example:

SELECT id, name, surname FROM employees ORDER BY id

The result woud be:

id    name    surname
 1     Peter   Smith
 2     John    Banjo
...
 1384  Will    Levenstein

While this is an ordered query, I can always assume (as long as I don't change the table) that John Banjo will come out second.

Now what if my query was

SELECT id, name, surname FROM employees WHERE name = 'John' AND surname = 'Banjo'

Could I somehow get what the row number would be in the first query? I'm trying to do this in a much more complicated, but always ordered query, is there any way to archieve this?

回答1:

 SELECT x.id, x.name, x.surname, x.rownum
 FROM (
      SELECT @rownum:=@rownum+1 rownum, t.*
      FROM (SELECT @rownum:=0) r, employees t
      ORDER BY Id
 ) x
 WHERE x.name = 'John' 
 AND x.surname = 'Banjo'

来源：https://stackoverflow.com/questions/3576304/mysql-row-number