Question

1I have the following two tables (sample data) and need to be able to group the all the id‘s which belong to the larger group called code and dateCreated, group when the dates are the same for the code

table1:

dateCreated | id
2011-12-27  | 1
2011-12-15  | 2
2011-12-17  | 6
2011-12-26  | 15
2011-12-15  | 18
2011-12-07  | 22
2011-12-09  | 23
2011-12-27  | 24

table2:

  code      | id
    EFG     | 1
    ABC     | 2
    BCD     | 6
    BCD     | 15
    ABC     | 18
    BCD     | 22
    EFG     | 23
    EFG     | 24

So the results (Hopefully right) should I need would be where codes are grouped by date:

dateCreated | code
2011-12-27  | EFG
2011-12-15  | ABC
2011-12-17  | BCD
2011-12-26  | BCD
2011-12-07  | BCD
2011-12-09  | EFG

Hopefully this makes sense….

I’ve tried a few things most recent something like this but without any luck (invalid column GroupCodes)

select dateCreated, (SELECT  distinct  code
                     FROM  table2 INNER JOIN
                     table1 ON id = table2.id) as GroupCodes

from table1
group by dateCreated, GroupCodes

Answer 1

Maybe I’m missing the issue, but wouldn’t the following work?

SELECT DISTINCT
    t1.dateCreated, t2.code
FROM
    table1 t1 JOIN
    table2 t2 ON t1.id = t2.id