Informix SQL to Oracle CASE Statement

I went ahead and deleted the other question...so I opened a new one...therefore please don't delete this one. There should be more experts like HainKurt...who ready and willing to help rather than ask unnecessary questions. HainKurt...I really appreciate your help so far...thx.

HainKurt:

How about the rest? TIA...

N

here are some tips so you can work on the rest:

Informix --> Oracle

Month(Current) --> to_number(to_char(sysdate,'mm'))
Year (CURRENT) --> to_number(to_char(sysdate,'yyyy'))
MDY (m,d,y) --> to_date(m||d||y,'mmddyyyy') -- assuming m,d, y are string, m & d is in this format xx, and y is in XXXX format
MDY (m,d,y) --> to_date(m||'/'||d||'/'||y,'mm/dd/yyyy') -- if m,d,y is not 0 padded

other than these, I dont see anything else...

Yah, thats pretty much it. I'll tryt make some sense out of this and finish the rest. Thx.

N

I did the necessary changes but I am getting errors...any advice?

TIA,
N
Informix-SQL-to-Oracle-CASE-Stat.docx

I cannot open the attachment.  What is the error message you are receiving?

I did not mean to say errors...sorry? I wanted to request that you check to make sure I did the correct changes.

TIA,
N

>>make sure I did the correct changes.

Do you get the correct results?  We don't know your code, data, ???  You should have test cases that you can run against your code to see if it is producing the correct results.

You need to learn what the Oracle functions are doing.  Once you do that, it should be a pretty easy conversion.

That said, I don't think you converted it properly.  Again, I cannot say for sure since I cannot test against your data/system but on a quick scan...

The old code:
CASE WHEN Month(CURRENT) >= 1 AND Month(CURRENT) <= 6

Does not seem to match what you use in:
CASE WHEN TO_NUMBER (TO_CHAR (SYSDATE, 'q')) = 1 THEN

If thats the case can you advice what to do on the rest of the code. I got help to do the first two queries and they work fine. So, I need help to write the correct syntax similar to the first two queries.

TIA,
N

Experts-Exchange is a technology question and answer site.  It really isn't set up for consulting services.

What we have been trying to tell you is, we cannot rewrite your code for you.  If you require someone to come in and port all your code, I suggest you look into hiring a consultant.

You should understand the logic in the Informix code.  HainKurt provided the mapping between the Informix calls and the Oracle counterparts.

You need to convert the logic.  The flaw I posted above was just a pretty obvious one.  There can easily be smaller ones that we cannot see.

Only you know if the code works or not.

Aside from 'rewrite all my code for me', is there any specific Oracle function you are having trouble understanding?

I understand. I've rewritten most of the code and I was only seeking your advice on writing something close to the first two queries in CASE STATEMENT logic on the Oracle side. However, I don't think you're willing to help which is the same case I experienced with you on another question. Maybe you should defer this question to another expert or Guru in Oracle...
N.

please post your code and errors.

don't put them in a docx.

Just use text, the code and errors will be in text so it's not only the most portable format, it should be the easiest too.

sdstuber - I'll definitely post my code...see below. I thought putting in a word document will make it easy. I do like your positive attitude...

Qtr 3 – Nbr Closed this Qtr
CASE WHEN Month(CURRENT) >= 1 AND Month(CURRENT) <= 9
THEN
SUM ( CASE WHEN Sfhd_Loan_Activity.Date_Of_Closing >= MDY(07,01,Year( CURRENT )-1) AND
Sfhd_Loan_Activity.Date_Of_Closing <= MDY(09,30,Year( CURRENT )-1)
THEN 1 ELSE 0 END )
ELSE
SUM ( CASE WHEN Sfhd_Loan_Activity.Date_Of_Closing >= MDY(07,01,Year( CURRENT )) AND
Sfhd_Loan_Activity.Date_Of_Closing <= MDY(09,30,Year( CURRENT ))
THEN 1 ELSE 0 END )
END

ORACLE:
      CASE
           WHEN TO_NUMBER(TO_CHAR(SYSDATE, 'q')) = 1
           THEN
               SUM(
                   CASE
                       WHEN sfhd_loan_activity.date_of_closing >=
                                ADD_MONTHS(TRUNC(SYSDATE, 'yyyy'), -12)
                            AND sfhd_loan_activity.date_of_closing <=
                                    ADD_MONTHS(TRUNC(SYSDATE, 'yyyy'), -9) - 30
                       THEN
                           1
                       ELSE
                           0
                   END)
           ELSE
               SUM(
                   CASE
                       WHEN sfhd_loan_activity.date_of_closing >= TRUNC(SYSDATE, 'yyyy')
                            AND sfhd_loan_activity.date_of_closing <=
                                    ADD_MONTHS(TRUNC(SYSDATE, 'yyyy'), 9) - 30
                       THEN
                           1
                       ELSE
                           0
                   END)
       END


Qtr 3 - Amount
CASE WHEN Month(CURRENT) >= 1 AND Month(CURRENT) <= 9
THEN
SUM ( CASE WHEN Sfhd_Loan_Activity.Date_Of_Closing >= MDY(07,01,Year( CURRENT )-1)  AND
Sfhd_Loan_Activity.Date_Of_Closing <= MDY(09,30,Year( CURRENT )-1)
THEN Sfhd_Loan_Activity.Loan_Amt  ELSE 0 END )
ELSE
SUM ( CASE WHEN Sfhd_Loan_Activity.Date_Of_Closing >= MDY(07,01,Year( CURRENT ))  AND
Sfhd_Loan_Activity.Date_Of_Closing <= MDY(09,30,Year( CURRENT ))
THEN Sfhd_Loan_Activity.Loan_Amt  ELSE 0 END )
END

ORACLE:
      CASE
           WHEN TO_NUMBER(TO_CHAR(SYSDATE, 'q')) = 1
           THEN
               SUM(
                   CASE
                       WHEN sfhd_loan_activity.date_of_closing >=
                                ADD_MONTHS(TRUNC(SYSDATE, 'yyyy'), -12)
                            AND sfhd_loan_activity.date_of_closing <=
                                    ADD_MONTHS(TRUNC(SYSDATE, 'yyyy'), -9) - 30
                       THEN
                          Sfhd_Loan_Activity.Loan_Amt  
                       ELSE
                           0
                   END)
           ELSE
               SUM(
                   CASE
                       WHEN sfhd_loan_activity.date_of_closing >= TRUNC(SYSDATE, 'yyyy')
                            AND sfhd_loan_activity.date_of_closing <=
                                    ADD_MONTHS(TRUNC(SYSDATE, 'yyyy'), 9) - 30
                       THEN
                          Sfhd_Loan_Activity.Loan_Amt  
                       ELSE
                           0
                   END)
       END


Qtr 4 - Nbr Closed this Qtr
SUM ( CASE WHEN Sfhd_Loan_Activity.Date_Of_Closing >= MDY(10,01,Year( CURRENT )-1) AND
Sfhd_Loan_Activity.Date_Of_Closing <= MDY(12,31,Year( CURRENT )-1)
THEN 1 ELSE 0 END )

ORACLE:
      CASE
           WHEN TO_NUMBER(TO_CHAR(SYSDATE, 'q')) = 1
           THEN
               SUM(
                   CASE
                       WHEN sfhd_loan_activity.date_of_closing >=
                                ADD_MONTHS(TRUNC(SYSDATE, 'yyyy'), -12)
                            AND sfhd_loan_activity.date_of_closing <=
                                    ADD_MONTHS(TRUNC(SYSDATE, 'yyyy'), -12) - 31
                       THEN
                           1
                       ELSE
                           0
                   END)
           ELSE
               SUM(
                   CASE
                       WHEN sfhd_loan_activity.date_of_closing >= TRUNC(SYSDATE, 'yyyy')
                            AND sfhd_loan_activity.date_of_closing <=
                                    ADD_MONTHS(TRUNC(SYSDATE, 'yyyy'), 12) - 31
                       THEN
                           1
                       ELSE
                           0
                   END)
       END

Qtr 4 - Amount
SUM ( CASE WHEN Sfhd_Loan_Activity.Date_Of_Closing >= MDY(10,01,Year( CURRENT )-1)  AND
Sfhd_Loan_Activity.Date_Of_Closing <= MDY(12,31,Year( CURRENT )-1)
THEN Sfhd_Loan_Activity.Loan_Amt  ELSE 0 END )

ORACLE:
      CASE
           WHEN TO_NUMBER(TO_CHAR(SYSDATE, 'q')) = 1
           THEN
               SUM(
                   CASE
                       WHEN sfhd_loan_activity.date_of_closing >=
                                ADD_MONTHS(TRUNC(SYSDATE, 'yyyy'), -12)
                            AND sfhd_loan_activity.date_of_closing <=
                                    ADD_MONTHS(TRUNC(SYSDATE, 'yyyy'), -12) - 31
                       THEN
                          Sfhd_Loan_Activity.Loan_Amt  
                       ELSE
                           0
                   END)
           ELSE
               SUM(
                   CASE
                       WHEN sfhd_loan_activity.date_of_closing >= TRUNC(SYSDATE, 'yyyy')
                            AND sfhd_loan_activity.date_of_closing <=
                                    ADD_MONTHS(TRUNC(SYSDATE, 'yyyy'), 12) - 31
                       THEN
                          Sfhd_Loan_Activity.Loan_Amt  
                       ELSE
                           0
                   END)
       END

TIA,
N

sdstuber - I understand...

I was looking for advice on how to write the query but it was hard to follow the solution. Hainkurt query was helpful though...

why the B?

your previous response said "I understand", but your closing comment says "hard to follow"

if you needed further explanation, just ask