RE: SQL Join - all rows from any table for employee -- MIDRANGE-L

All of what Luis said. :)

Plus, at this location, program development takes at least 10 days to get to
production if not an emergency. Without getting into the rights and wrongs
of all of this, an SQL to identify/solve a short-term problem can be
developed and executed on the fly. So SQL can be used to get past some of
the overhead in this case.

Dennis Lovelady
http://www.linkedin.com/in/dennislovelady
--
I talk to myself at work because nobody else here understands me.

Sometimes it just might be easier to write the program with I/O.

Yes, of course. As always, it depends on your business needs. On the
other
hand, as I see it, one of the main advantages of doing this kind of
solution
(Birgitta's SQL solution) is that you can define a particular business
rule
just once, encapsulate in a SQL view and have it accessible for several
developers and/or programs, queries, etc., without having to reinvent
the
wheel every time (by nature, I am lazy, so this kind of solutions
appeal to
me :-) ).

Also, there is what I suspect is the main interest in this kind of
solutions: Just to see if and how can be done. In other words, just for
the
heck of it...

Best Regards,

Luis Rodriguez
IBM Certified Systems Expert - eServer i5 iSeries

On Fri, Jun 11, 2010 at 7:49 AM, <Michael_Schutte@xxxxxxxxxxxx> wrote:

Sometimes it just might be easier to write the program with I/O.

DoW not %EoF(PRMAST);
Read PRMAST;
If %EoF(PRMAST);
Leave;
EndIf;

Chain (empno) DEDBAL;
If not %Found();
// Clear fields;
employee_contributions = 0;
employer_contributions = 0;
EndIf;
Wages = 0;
SetLL (empno) INCBAL;
Dow not %EoF(INCBAL);
Read INCBAL;
If %EoF();
Leave;
EndIf;
// sum wages
Wages += income_amount;
EndDo;
// Print employee data
EndDo;

--

Michael Schutte
Admin Professional

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"Dennis Lovelady"
<iseries@lovelady
.com>

To

Sent by: "'Midrange Systems Technical
midrange-l-bounce Discussion'"
s@xxxxxxxxxxxx <midrange-l@xxxxxxxxxxxx>

cc

06/10/2010 06:30

Subject

PM RE: SQL Join - all rows from

any

table for employee

Please respond to
Midrange Systems
Technical
Discussion
<midrange-l@midra
nge.com>

Yeah, I was pretty loose about the specifics because I don't want to

give

the impression that I want someone else to write this for me. I

don't.

But
here we go:

DEDBAL contains quarterly deduction amounts (employer and employee
contribution), the year, the quarter, employee number and other stuff.

INCBAL contains quarterly income amounts, Federal wage base, the year,

the

quarter, employee and other stuff.

I need employee name, year, quarter, max(wage base), sum(income

amounts),

sum(employee contribution), sum(employer contribution) and some other
stuff.

So from these three tables, I need multiple columns of each, put

together

onto a single row by employee.

UNION might work, but I don't think UNION DISTINCT (by itself) will

do what

I want. I could do a left outer and an exception join, but then the
summing
and other details would get complex and would need to be mostly (but

not

completely) duplicated. Messy.

I liked the look of FULL JOIN, but apparently that's only available

some

after V5R3, which is where we are.

Likely I'll just write a program, but I wondered if there might be a

more

standard solution.

Sorry I wasn't completely upfront before. I just don't want to be

one of

those "here's my task - do it for me" people.

Dennis Lovelady
http://www.linkedin.com/in/dennislovelady
--
"A cynic is a man who knows the price of everything and the value of
nothing."
-- Oscar Wilde

Do you need info from DEDBAL and INCBAL? If not, you could use

EXISTS.

SELECT * <-- desired fields from PRMAST go here
FROM PRMAST
WHERE EXISTS (SELECT 1 FROM DEDBAL WHERE DEDEMP=PREMP)
OR EXISTS (SELECT 1 FROM INCBAL WHERE INCEMP=PREMP)

If you need to pull data from DEDBAL and INCBAL, you could use a

LEFT

OUTER
join
and then exclude those cases where an employee has no records in

DEDEMP

and
INCEMP.

Try this:

SELECT * <-- desired fields from PRMAST, DEDBAL, and INCBAL go

here

FROM PRMAST
LEFT OUTER JOIN DEDBAL ON DEDEMP=PREMP
LEFT OUTER JOIN INCBAL ON INCEMP=PREMP
WHERE DEDEMP IS NOT NULL OR INCEMP IS NOT NULL

In this case, if an employee has records in DEDBAL but not in

INCBAL,

any
fields in INCBAL would be null and vice versa.

Have fun!

Richard Casey

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Dennis

Lovelady

Sent: Thursday, June 10, 2010 3:38 PM
To: 'Midrange Systems Technical Discussion'
Subject: SQL Join - all rows from any table for employee

We have three tables: DEDBAL, INCBAL, and PRMAST.

Each of these contains an employee number (DEDEMP, INCEMP, PREMP).

We

want
to produce output where an employee is represented in either DEDBAL

and

INCBAL or both. (For the sake of argument, we can assume that

PRMAST

is
present for each employee).

I've tried various types of joins (LEFT OUTER, FULL, et cetera) and
have
pored through the archives and GOOGLE and come up empty on a means

of

doing
this exactly right. (I'm convinced this is a common issue; so my

issue

is
probably my choice of search words - usually resulting in too many
hits).
Would some kind soul mind directing me to guidelines on how to

write

the
JOIN for this challenge?

Thanks!

Dennis E. Lovelady
AIM/Skype: delovelady MSN: fastcounter@xxxxxxxxxxxx
<http://www.linkedin.com/in/dennislovelady>
www.linkedin.com/in/dennislovelady --
I am at one with my duality.

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