Question

My target DBMS’s are both Oracle and MySQL

 SELECT
  users.*
  , hr_orders.position_label
  , hr_orders.is_boss
  , deps.label AS dep_label        -- preprocessor removes AS when using Oracle
  , users.id IN (?) AS show_on_top -- Oracle doesn't accept this IN thing
 FROM
  -- some joins here
 WHERE
  -- some filters

Is it possible to give cross-DBMS equivalent of this query?

UPDATE

Ok, it ruins the logic, the guy before me wanted always show some users on top,

WHERE
    users.fake = 0
AND (
        users.id IN (?)
    OR
        -- some more detailed filters
    )
ORDER BY
    IF (users.id IN (?), 1, 2), users.label

where ? is parameter referring to top users.

This show_on_top field is needed to highlight top records later.

Therefore, if I move IN to where clause, only users shown on top will be selected, not the rest.

Splitting the query into two and combining users list in code still looks ugly to me.

Answer 1

You should put the IN into the WHERE clause

SELECT
  users.*
  , hr_orders.position_label
  , hr_orders.is_boss
  , deps.label AS dep_label        
  , users.id  AS show_on_top 
 FROM
  -- some joins here
 WHERE
  -- some filters
  AND users.id IN (?,?,?)