Question

I have a single table with Id, the thing is that i need to provide N number of Ids (using WHERE id IN (1,5,101)) but i need to get the same number of records back (if i send 100 ids, i need a DataSet with 100 rows ..) even if Id doesn’t exist on this table.

I’m using SQLite so RIGHT JOIN is not an option.

Here is some sample of what i have but cant make it work :S ..

SELECT * FROM (
 SELECT r.report_id, r.batch_name, tr.report_id id, tr.batch_name bn
 FROM reports tr
 LEFT OUTER JOIN (  SELECT report_id, batch_name FROM reports
                    WHERE batch_name IN ("L6964498","AAAAAA")) r on r.report_id = tr.report_id) as v 
 LEFT JOIN reports ON v.id = reports.report_id

Thanks in advance …

Answer 1

Make up a virtual table of batch names using SELECT .. UNION ALL SELECT ... Then join that to your reports table.

SELECT tr.batch_name, r.report_id
FROM (SELECT 'L6964498' batch_name UNION ALL
      SELECT 'AAAAAA') tr
LEFT JOIN reports r on r.report_id = tr.report_id

If you have 100 items, you will have 99 UNION ALLs.