Question

I have the following database to use it in an Android 3.0 tablet application.

I want to select every Defect which it isn’t on EReportDefect. As you can see EReportDefect.defectId could be null.

This select returns 0 rows. But there are defects which aren’t on EReportDefect table.

SELECT 
  Defect.defectId,
  Defect.description
FROM 
  Defect 
WHERE 
   qapId = ? AND
   defectId NOT IN 
     (SELECT defectId FROM EReportDefect WHERE eReportId = ?);

What am I doing wrong?

Answer 1

This is how I make works:

SELECT
   Defect.defectId,
   Defect.description
FROM
   Defect
WHERE
   qapId = ? AND
   defectId NOT IN 
     (SELECT
        defectId
      FROM
        EReportDefect
      WHERE eReportId = ? AND defectId IS NOT NULL);