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Oracle SQL Question

Posted on 2011-09-02
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Last Modified: 2012-06-27
start time

select SUBSTR(TO_CHAR(0630, 'FM0000'),1,2)
   || ':' || SUBSTR(TO_CHAR(0630, 'FM0000'),3,2) as start_time from dual
   
worked time

select 1050 / 100 from dual;  

end time to derive

required result 5:00 (PM)
-------------------
The user inputs start time 0630(gets converted to 06:30)
and time worked as 1050( gets converted to 10.50)
Now the required time is 5:00 PM. Help is appreciated.
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Question by:anumoses
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Expert Comment

by:slightwv (䄆 Netminder)
ID: 36473169
Something like:

SQL> select to_char(to_date('0630','HH24MI'),'HH:MI AM') from dual;

06:30 AM
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Expert Comment

by:sdstuber
ID: 36473219


0630  = 6:30

but

1050  = 10:30   ?
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Expert Comment

by:sdstuber
ID: 36473229
select to_char(to_date(SUBSTR(TO_CHAR(0630, 'FM0000'),1,2)
   || ':' || SUBSTR(TO_CHAR(0630, 'FM0000'),3,2),'hh24:mi') + (1050/100/24),'hh12:miPM') from dual
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Author Comment

by:anumoses
ID: 36473386
select to_char(to_date(SUBSTR(TO_CHAR(0630, 'FM0000'),1,2)
   || ':' || SUBSTR(TO_CHAR(0630, 'FM0000'),3,2),'hh24:mi') + (1050/100/24),'hh12:miPM') from dual

This is a perfect solution. Can we exclude PM?
and get only 05:00 populated?
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Assisted Solution

by:sdstuber
sdstuber earned 500 total points
ID: 36473390
sure, just remove the PM

elect to_char(to_date(SUBSTR(TO_CHAR(0630, 'FM0000'),1,2)
   || ':' || SUBSTR(TO_CHAR(0630, 'FM0000'),3,2),'hh24:mi') + (1050/100/24),'hh12:mi') from dual
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Author Comment

by:anumoses
ID: 36473893
:dtl.end_time := to_char(to_date(SUBSTR(TO_CHAR(:dtl.start_time, 'FM0000'),1,2)
         || ':' || SUBSTR(TO_CHAR(:dtl.start_time, 'FM0000'),3,2),'hh24:mi') + (:dtl.time_worked/100/24),'hh12:mi');

               message('end time1 ='||:dtl.end_time);pause;

When I run the query in toad replace the block values with the above values I get the result as 05:00. In forms I put message, but the value is not populated. Any form experts as to why?
field end_time char(6)
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Expert Comment

by:sdstuber
ID: 36473981
nulls?

are you sure your variables are populated with what you think they should be?
if so, how have you verified that assumption?
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Author Comment

by:anumoses
ID: 36474247
I put messages to populate start time and time worked

start time is 06:30
time worked 10.5
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Expert Comment

by:sdstuber
ID: 36474269
what is :dtl.start_time  ?
based on the rest of the question it should be 0630 not 06:30


what is :dtl.time_worked   ?
based on the rest of the question it should be  1050 not 10.5  
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Author Comment

by:anumoses
ID: 36474372
In the above can I seperate the start time and time worked?
I tried but I get inconsistent datatypes error
select to_char(to_date(SUBSTR(TO_CHAR(0630, 'FM0000'),1,2)
         || ':' || SUBSTR(TO_CHAR(0630, 'FM0000'),3,2),'hh24:mi') ,
             (1050/100/24),'hh12:mi') from dual
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Author Comment

by:anumoses
ID: 36474404
we ae formatting the fileds from 0630 to 06:30 and 1050 to 10.50
so do we have to reformat back to 0630 and 1050 in order to get 0500?
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Expert Comment

by:sdstuber
ID: 36474426
>>> so do we have to reformat back to 0630 and 1050 in order to get 0500?

yes, of course.

the function calls above are based on the input you specfied,  which as 0630 and 1050.

if you don't want to use those inputs then the function calls will be different
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Author Comment

by:anumoses
ID: 36474438
once I put put 0630 becomes 06:30
and 1050 becomes 10.50
so what is the query to convert them back to 0630 and 1050? Would appreciate.
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Author Comment

by:anumoses
ID: 36474479
 
select to_char(to_date(SUBSTR(TO_CHAR(0630, 'FM0000'),1,2)||
SUBSTR(TO_CHAR(0630, 'FM0000'),3,2),'hh24mi'),'hh12mi') from dual
------
0630
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Accepted Solution

by:
sdstuber earned 500 total points
ID: 36474514
if the input you have is 06:30 and 10.5 that's fine
it actually makes it easier


 TO_CHAR(TO_DATE(:start_time, 'hh24:mi') + (:time_worked / 24), 'hh:mi')
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Author Comment

by:anumoses
ID: 36474561
one last question
I know we removed PM.
but is there a way to add that as a column to make sure the time is AM or PM?
for eg if the employee starts at 0630 and ends the shift at 1130, its 11:30AM
So if I can get it as a seperate column in the query I would appreciate it.
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Assisted Solution

by:sdstuber
sdstuber earned 500 total points
ID: 36474607
TO_CHAR(TO_DATE(:start_time, 'hh24:mi') + (:time_worked / 24), 'hh:mi')   time


TO_CHAR(TO_DATE(:start_time, 'hh24:mi') + (:time_worked / 24), 'PM')   am/pm
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Author Closing Comment

by:anumoses
ID: 36475169
thanks
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