Here is a simple example of what I need to do.....
Table: EMPLOYEES
name job
--------- -----------
alan welding
sue foreman
fred machinist
Table: WAGE
job rate
----------- -----------
welding 20
machinist 23
Table: DANGER
job level
---------- ----------
welding 2
machinist 3
foreman 1
OK, I want a query that’ll give me the employee, their rate and their job’s danger level for jobs with danger level <= 2. I want one ine per employee (regardless of the fact that there is no record in WAGE for sue the foreman). So it looks like a left outer join is needed. This query doesn’t crash, but it leaves sue the foreman out...
select
e.name, w.rate, d.level
from
employees e left outer join wage w on (e.job = w.job),
danger d
where
d.job = w.job and
d.level <= 2;
Any suggestions? (Thanks in Advance !)
For testing, yoou can use these...
create table employees (name varchar(16), job varchar(32));
insert into employees (name,job) values ('alan','welding');
insert into employees (name,job) values ('sue','foreman');
insert into employees (name,job) values ('fred','machinist');
create table wage (job varchar(43), rate integer);
insert into wage (job, rate) values ('welding',20);
insert into wage (job, rate) values ('machinist',23);
create table danger (job varchar(32), level integer);
insert into danger (job, level) values ('welding',2);
insert into danger (job, level) values ('machinist',3);
insert into danger (job, level) values ('foreman',1);
