Question

I could really use some help with the following SQL Select statement scenario:

I need to select all rows from a table conditionally depending on whether a userID has already entered data into a second table with the same ID.

Example:

1. Select all rows from TABLE A for idNumber where idNumber not in
   TABLE B
2. but for each idNumber that IS in TABLE B, still return row unless a
   specific userID is in that row in TABLE B.

---

TABLE A
========
idNumber|type|Date

   1      A    01/01/01

   2      A    01/01/01

   3      B    01/01/01

   4      B    01/01/01

   5      B    01/01/01

TABLE B
========
idNumber|type|userID
   1      A    0000

   3      B    0000

   4      B    1111

userID to exclude records for = 1111

SQL Query should return:

idNumber|type|Date

   1      A    01/01/01

   2      A    01/01/01

   3      B    01/01/01

   5      B    01/01/01

Apologies for the long winded post but i hope it makes sense.

Many thanks in advance,
ukjezza.!!

Answer 1

Select idNumber, type, Date
From TableA
Where Not Exists    (
                    Select 1
                    From TableB
                    Where TableB.idNumber = TableA.idNumber
                        And TableB.userID = 1111
                    )

Another choice:

Select TableA.idNumber, TableA.type, TableA.Date
From TableA
    Left Join TableB
        On TableB.idNumber = TableA.idNumber
            And TableB.userId = 1111
Where TableB.idNumber Is Null