I am trying to group my data based on age. I use the following database select:
select * from (
select 0 range_start, 11 range_end, '0-10 days' date_description from dual union
select 11, 21, '11-20 days' from dual union
select 21, 31, '21-30 days' from dual union
select 31, 99999, '31+ days' from dual) date_helper
left outer join table
on table.date <= date_helper.range_start*-1 + sysdate
and table.date > date_helper.range_end*-1 + sysdate
I then make a group based on the date_description column. I am trying to make it display all groups, even when there are no records, that fall within that group. If there are no records, I want it to have a value of 0, and still print the group.
Expanding on a comment on PowerUser's answer, if you're using a version of Crystal that allows you to enter your own SQL (instead of having to use Crystal's Database Expert), you can set up a subquery that acts as a helper table - something like:
select * from (
select 0 range_start, 11 range_end, '0-10 days' date_description from dual union
select 11, 21, '11-20 days' from dual union
select 21, 31, '21-30 days' from dual union
select 31, 99999, '31+ days' from dual) date_helper
left outer join
(select sysdate-5 mydate from dual union all
select sysdate - 25 from dual) mytable
on mytable.mydate <= date_helper.range_start*-1 + sysdate
and mytable.mydate > date_helper.range_end*-1 + sysdate
(Oracle syntax - the precise syntax of the query will vary depending on which dialect of SQL you are using.)
EDIT: Changed from SQLServer to Oracle syntax.
FURTHER EDIT: Added some simple sample data.