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    Is that possible to creat three primary keys in same table?

    Is that possible to creat three primary keys in same table? If that possible how to do this?
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    primary key for field its typed is a Date/Time

    I created a Table including tow Fields A,B The teyped of A is Text. The typed of B is Date/Time.I set B a primary key The question is: When I set to first row in B this Date 01/01/2009 and I tried to set the same Date to second row;it didn't acccpet this Is this possible to set the same date to...
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    Question about changing the format of Date/time

    I have a Column it's type is Date/Time . I want to change the format of this column from MM/dd/yyyy to dd/MM/yyyy. is it possible?
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    Realtioinshio between tow Tables...With condition

    In the first thank you for this sitea and I'll use a pic to express What I want because my language isn't very well. Here are tow tables (Table2,Table3). I want to make relationship between them Where, in the F column of Table2 will Sum the numbers in F column of Table 3 according this condition...
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