I need help with a SELECT query - help!

Question

Hello, I need help with a select statement.
I have a table with 2 fields as shown below
Name | Type
John | 1
John | 2
John | 3
Paul | 1
Paul | 2
Paul | 3
Mark | 1
Mark | 2
I need a query that returns everything where the name has type 1 or 2 but not type 3. So in the example above the qery should bring back all the "Mark" records.
Thanks,
Ian

Answer 1

Or, if the types are sequential from 1 upwards you could simply do:-
SQL> create table t as
  2  select 'John' as name, 1 as type from dual union
  3  select 'John',2 from dual union
  4  select 'John',3 from dual union
  5  select 'Paul',1 from dual union
  6  select 'Paul',2 from dual union
  7  select 'Paul',3 from dual union
  8  select 'Paul',4 from dual union
  9  select 'Mark',1 from dual union
10  select 'Mark',2 from dual;
Table created.
SQL> select name
  2  from t
  3  group by name
  4  having count(*) <= 2;
NAME
Mark
SQL>Or another alternative if they aren't sequential:
SQL> ed
Wrote file afiedt.buf
  1  select name from (
  2    select name, max(type) t
  3    from t
  4    group by name
  5    )
  6* where t < 3
SQL> /
NAME
Mark
SQL>Message was edited by:
blushadow