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Use Dbsum,Tabletotal or Total for set?

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    #1

    Use Dbsum,Tabletotal or Total for set?

    How do I go about stuffing a total from a SET not related to the current form into a global variable. It appears from the documentation that this is not possible. Is there a place I can go to get examples of the syntax used with these functions?
    Tags: None
    #2
    RE: Use Dbsum,Tabletotal or Total for set?

    The pdf files (it seems most prefer the Word files) that ship with Alpha Five document these functions pretty well...

    These functions do not work on sets - only tables, so you need a filter as one of the parameters. This is the trickiest part...The filter has to end up as a character string that evaluates to something like Customer = 'Jones' so YOU enter "Customer '"+Cust->last+"'"
    or
    Invoicenum = 1425 so YOU enter "Invoicenum = "+alltrim(str(Invhead->Invoicenum))+"'"

    I usually create a variable on thr form or report called "filter" just for this part, so I don't get confused about what the expression produces - I check it in the expression builder window.

    I am pretty busy these days, but keep the questions coming, and someone will pitch in...

    Stephen Williams

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      #3
      RE: Use Dbsum,Tabletotal or Total for set?

      First of all, here's the syntax for DBSUM:

      DBSUM("TABLE.DBF","INDEX",VALUE TO MATCH,"FIELD")

      This will take the total from FIELD in TABLE for all records that match the VALUE TO MATCH based on the INDEX in TABLE. The VALUE TO MATCH can be a value that you have defined in a script, or a value that matches a field value in your current table.

      You mentioned getting a value from a set. Well, the parent table would usually hold values that you look at in a set, such as a total from the child (which could also be determined by using DBSUM, or by posting from the child to the parent). There really isn't a total for a set per se. Therefore, you could use DBSUM on the parent of the set.

      You also mentioned "...stuffing a total...". There is a function called STUFF that will take a string and put it into another string. Do you really want to do this? If so, you would use STR to convert your numeric total to a character string, and then use stuff. As an example:

      STUFF("ABCDE",4,0,"123") = "ABC123DE"

      will take the string ABCDE and, starting with the 4th character, insert ABC. The 0 after the 4 means to replace 0 characters. If that had been a 1, the result would be:

      STUFF("ABCDE",4,1,"123") = "ABC123E"

      I hope this answers your question.

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