Help in adding the validation

Question

Hi All,
I have two tables table A and table B.Table A has equipment,shift,from date ,to date and quantity columns and table B has equipment,shift,from date and to date columns. Data in table b is like e1,s1, 1/24/2010 10:00:00,1/24/2010 12:00:00;
e1,s1, 1/24/2010 13:00:00,1/24/2010 14:00:00;
e1,c1, null,null;
temporary table for Table A has the data as
e1,s1, 1/24/2010 10:00:00,1/24/2010 10:30:00;
e1,s1, 1/24/2010 10:30:00,1/24/2010 12:00:00;
e1,c1,1/24/2010 12:00:00,1/24/2010 13:00:00;
The data from temporary table should move to table A only when if the user uses the shift c1 for the time for which there is no row defined in table B means if the user enters in temporray table e1,c1, 1/24/2010 10:00:00,1/24/2010 10:30:00;
then it should not move to table A because he has used the c1 for the time which was defined for shift s1. means if temp. table is using the shift c1 then for the time for which its using there shouldn't be any row in table b except teh row with from date and to date as null.Can someone please tell me how to add this validation.
Thanks in advance.

Answer 1

Hi Oleg,
Thanks again for your response.But I didn't understood the query...I wanted the validation for e1,c1,from time,to time row in temp table of table A for this the row present in the table A would be e1,c1,null(from time),null(to time).actually my requirement is to match the shift time (from time and to time of temp table A) for a given shift and equipment with from time and to time of table B. If form time and to time are not null then I have written the condition:
temp_tablea.equipment_id=tableb.equipment_id
and
temp_tablea.shift_id=tableb.shift_id
and
temp_tablea.from_time>=tableb.from_time
and temp_tablea.from_time<=tableb.to_time
and
temp_tablea.to_time>=tableb.from_time
and temp_tablea.to_time<=tableb.to_time
This will work if from time and to time of table B are not null .But if its null it won't work. suppose shift doesn't exist for a particular period say 13:00:00PM -14:00:00PM then data in table b is in the format
e1,s1,12:00:00 AM,13:00:00 PM
e1,s2,14:00:00PM,12:00:00 AM
e1,c1,null,null(this is basically for all the days we have this kind of row so that if the shifts are not continous we have row which has from time and to time as blank).
Now suppose the data comes for 13:00:00-14:00:00 in temp table of table A then the row would be e1,s1, 13:00:00,14:00:00 so basically i want to add that validation which will check whether the time given for this row comes in any of the sHifts dfined in that table ex. e1,c1,12:00:00PM,14:00:00 PM is given in temp table A then thsi row should go to error because 12PM -13 PM is there with a valid shift, only if e1,c1 has the time 13 pm -14pm whcih is not defined for any shift in table B then it will go to fact.
Thanks in Advance.
Regards,
Amrit