Is it possible in SQL to substitute a string if a certain value is returned from a query? For example,
select emp_id from emp_tb
1 2 3
Would it be possible to replace 1 with John and 2 with Mary to give the end result of
John Mary 3
Yes, you can stuff a whole raft [syn: batch, deal, flock, good deal, great deal, hatful, heap, lot, mass, mess, mickle, mint, muckle, peck, pile, plenty, pot, quite a little, sight, slew, spate, stack, tidy sum, wad, whole lot, whole slew] of translations into the SELECT if you wish...
select case emp_id when 1 then 'John' when 2 then 'Mary' else cast(emp_id as char(4)) end as emp_string from emp_tb
Note that some database systems may require the CAST, but some don't, and will set the datatype of the CASE expression from the first defined expression inside the CASE.
This was first published in August 2004