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Selecting Max Date and Prior Date for closed month
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Forum:
Visual FoxPro
Catégorie:
Base de données, Tables, Vues, Index et syntaxe SQL
Titre:
Selecting Max Date and Prior Date for closed month
Divers
Thread ID:
00603669
Message ID:
00603669
Vues:
61
Hi everybody,

I'm trying to figure out a select statement, if it could be done through SQL.

I have FilingDate table. It has this structure:
Structure for table:                   G:\REDP\DBC\SUPPORT\FILINGDATE.DBF
Number of data records:       9669    
Date of last update:           01/11/2002
Memo file block size:         1
 Code Page:                   1252    
         Field     Field Name          Type             Width 
             1     DSID                Integer           4
             2     EXTRYEAR            Character         4
             3     EXTRWEEK            Character         2
             4     STATE               Character         2
             5     CCODE               Character         2
             6     RCODE               Character         2
             7     TOWN                Character         4
             8     RECORD_FM           Date              8
             9     RECORD_TO           Date              8
            10     LANDCT_FM           Date              8
            11     LANDCT_TO           Date              8
            12     CALMNTH             Character         10
            13     MDFLAG              Logical           1 
            14     NODATA              Logical           1 
            15     NOTES               Memo              4 
            16     DDFLAG              Logical           1 
** Total **                                              70
CalMnth is filled, if town/registry is closed, e.g. 062001 indicates, what this town/registry is closed in June, 2001 on ExtrYear = 2001 Week 49 (for example). Otherwise CalMth is empty.

So, I want to select all max months closed + their data and the prior months closed + their data. I need this info to calculate predicted dates (week) of closing in 122001.

Could it be done through SQL or I need to create some program to do it?
If it's not broken, fix it until it is.


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