Question

I would like to know if it is possible in an SQL query to replace some values by something else, or if I need to do that in post-processing.

Let me explain. I have this table:

|username| accepted |
|--------|----------|
|  toto  |   NULL   |
|--------|----------|
|  foo   |    0     |
|--------|----------|
|  Rick  |    1     |
|--------|----------|
|  bar   |    1     |
|--------|----------|

I want to know the numbers of row per value of accepted (nullable bit). I’m running this query:

SELECT [accepted], count(*) FROM my_table GROUP BY [accepted]

Which should return:

NULL   1  
false  1  
true   2

Is there some way to replace the accepted values by more meaningful labels? Ideally I would like to have something like:

not_available 1
not_accepted  1
accepted      2

Is that feasible with SQL server 2008 R2?

Thx.

Answer 1

If you have a few values:

SELECT CASE [accepted] 
WHEN 0 THEN 'not_accepted' 
WHEN 1 THEN 'accepted '
ELSE 'not_available' END AS accepted
, count(*) 
FROM my_table 
GROUP BY CASE [accepted] 
WHEN 0 THEN 'not_accepted' 
WHEN 1 THEN 'accepted '
ELSE 'not_available' END