Table EABL Question SORT with reading date ADATTATS and ADAT

Hi all,
I have selction criteria to qery EABL.
After select ,i have to sort to get latest 10 records from EABL .
I was told if the value of ADATTATS is null ,i should display ADAT .
But to select latest 10 records i have need to sort based upon date field..IF date field is null i will not get sort in proper descending order......
Any suggestions and help ?
display :for a partcular contract account
Current meter reading date 1
previous meter reading date 2
previous meter reading date 3
Is there any other field in this table EABL which could be used for SORT here for this display.
Thanks in advance...
Edited by: Sona on Feb 26, 2008 7:29 PM

Yes,
My case is :
ADATTATS
record1 : date1
date2
null
null
record5 : date5
ADAT
record1 : 0
0
date3
date4
record5 :     0
Result is :
date1
date2
date3
date4
date5
I was told only if date is null in ADATTATS i should go for ADAT.(that means only then value will be in ADAT)The majority of the time there will be a date in ADATTATS. If an estimate or manual MR is entered, the date will come from ADAT.
My test table has all null values in ADATTATS ,i hv values only in ADAT in test table.
Another question :
Can we change the data in test tables ?
Testing process to check the billing run ?what r the steps involved ?

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Table EABL Question SORT with reading date ADATTATS and ADAT

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