SQL Server Oracle If else differences

Question

I have a query in SQL Server 2008 that uses an if statement to determine how the SQL is returned. It is fairly complex but here it is in its basic form.
declare @granularity varchar(20);
begin
set @granularity = 'Month';
if (@granularity = 'Month')
begin
select count(*) as DisplayCount, yearstep, monthstep
from MyTable
group by yearstep, monthstep
order by yearstep, monthstep
end
else
if (@granularity = 'Year')
begin
select count(*) as DisplayCount, yearstep
from MyTable
group by yearstep
order by yearstep
end
end
Originally I thought the conversion would be as easy as changing the @ to :, adding a then and an end if. Not so....
Can anyone show what the Oracle equivalent would be?
Edited by: user497094 on Aug 20, 2010 12:51 PM

Answer 1

If you use SQL Developer tool, you have a translator to translate T-SQL to Oracle PL/SQL language.
For your example, you should get:
BEGIN
v_granularity := 'Month' ;
IF ( v_granularity = 'Month' ) THEN
BEGIN
SELECT COUNT(*) DisplayCount,
yearstep,
monthstep
FROM MyTable
GROUP BY yearstep,monthstep
ORDER BY yearstep,
monthstep;
END;
ELSE
IF ( v_granularity = 'Year' ) THEN
BEGIN
SELECT COUNT(*) DisplayCount,
yearstep
FROM MyTable
GROUP BY yearstep
ORDER BY yearstep;
END;
END IF;
END IF;
END;
I hope it helps youi
Regards,
Mireille