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SQL Convert() in WHERE clause

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    SQL Convert() in WHERE clause

    Anyone know how to convert the numeric value to a character-type for use in a where clause? Closest I can come is below, but it just throws an error:

    Code:
    SELECT Categories.CategoryID, Categories.CategoryName, Categories.Description 
    FROM Categories Categories
    WHERE convert(varchar(2),Categories.CategoryID) in ("1,3,5")
    I've tried other functions including to_char(), character(), and cast() to no avail.
    -Steve
    sigpic

    #2
    Re: SQL Convert() in WHERE clause

    I'm using this in the SELECT, but presumably it still works in the WHERE clause(?).

    Code:
    convert(varchar(4),employee.EMP_TEAM_LEADER_ID,0)  AS TL_ID_Char
    The 4 is how many digits the numeric field is; the 0 I don't even remember--maybe decimal places?

    Comment


      #3
      Re: SQL Convert() in WHERE clause

      Thanks Chris.

      Did this (it's from the Northwind Category table):

      convert(varchar(11),Categories.CategoryID,0) as CatIDChar in ('1,3,5')

      Got this error:

      Syntax error (missing operator) in query expression 'convert(varchar(11),Categories.CategoryID,0) as CatIDChar in ('1,3,5')'.


      As usual, tried a lot of related combinations too, but no dice so far.
      -Steve
      sigpic

      Comment


        #4
        Re: SQL Convert() in WHERE clause

        I don't see why you need to convert anything. The syntax on you 'in' statement is wrong.

        'in' is an array and since you have a numeric you wouldn't use quotes (1,2,3) not ("1,2,3")

        if you wanted to use a character it would be ('1','2','3')

        Comment


          #5
          Re: SQL Convert() in WHERE clause

          Well, I got this to work correctly on my computer:

          Code:
          SELECT Categories.CategoryID, Categories.CategoryName, Categories.Description 
          FROM Categories Categories
          [COLOR="Blue"]WHERE Categories.CategoryID IN (1,3,5)[/COLOR]
          But when I take this approach on my customer's grid, we get no filtering at all:

          Code:
          SELECT DISTINCT tblStudents.ID, tblStudents.School, tblStudents.StudentNumber, tblStudents.FirstName, tblStudents.LastName, tblStudents.DateOfBirth
          FROM tblStudents tblStudents
               INNER JOIN tblEIIIntermediate tblEIIIntermediate
                   ON  tblEIIIntermediate.StudentNumber = tblStudents.StudentNumber  
          [COLOR="Blue"]WHERE tblStudents.School IN (1,3,8)[/COLOR]
          ORDER BY tblStudents.LastName, tblStudents.FirstName
          -Steve
          sigpic

          Comment


            #6
            Re: SQL Convert() in WHERE clause

            Why is there an inner join but nothing is selected from it and why are you using DISTINCT?

            What happens when you take it out?

            Comment


              #7
              Re: SQL Convert() in WHERE clause

              I had a brain fart earlier, I've been working with a lot of outer joins this afternoon and was thinking about those when I replied.

              I see what you are doing and it works like it should for me. I just did a quick grid with a 1 to many table and did an inner join using 'in' and it only select what it was supposed to.

              Comment


                #8
                Re: SQL Convert() in WHERE clause

                Can you post your Select statement so I might detect any differences or nuances?

                Thanks.
                -Steve
                sigpic

                Comment


                  #9
                  Re: SQL Convert() in WHERE clause

                  SELECT DISTINCT t1.idinvtry_detail, t1.reqdate, t1.qty
                  FROM invtry_detail t1
                  INNER JOIN invtry_expanded t2
                  ON t1.guid = t2.guid
                  WHERE t1.idinvtry_detail IN (20,23,25)
                  ORDER BY t1.idinvtry_detail, t1.reqdate

                  Comment


                    #10
                    Re: SQL Convert() in WHERE clause

                    Still fiddling with this one.

                    The Where clause, if I write it directly to the SQL statement works like this:

                    Code:
                     WHERE tblStudents.School IN (1,8)
                    tblStudents.School is an integer

                    But, I need to supply the list via an argument, e.g.

                    Code:
                     WHERE tblStudents.School IN (:ArgSchools)
                    So, the argument has to be of character type to provide for comma-separated values, e.g. 1,8.

                    Failed attempts include:

                    Code:
                    CAST(Categories.CategoryID as varchar(2)) IN (:ArgSchools)
                    Code:
                    convert(varchar(2),Categories.CategoryID) in (:ArgSchools)
                    and in these approaches, I've tried setting ArgSchools to

                    Code:
                    1,8
                    as well as 
                    '1','8'
                    I tried making the argument type numeric and filling it with 1,8 but that produced the expected error.

                    Any other suggestions?
                    -Steve
                    sigpic

                    Comment


                      #11
                      Re: SQL Convert() in WHERE clause

                      Steve, I've never had any luck using args with an "In" comparison, probably because of the formatting alpha5 does to the args to thwart SQL injection attacks. If you find an answer, I'd be very eager to know how as well.

                      You can generate your own sql statement and pass it into the override options for the grid, but that will require custom coding to build the sql statement, and also bypass the built-in SQL injection protection.

                      Another workaround could be having a search part in your grid with a multi-select dropdown/list box.

                      Comment


                        #12
                        Re: SQL Convert() in WHERE clause

                        I just took a look and I see why it doesn't work.

                        Heres what your db is expecting:
                        Code:
                        ...in ([Array])...
                        Heres what Alpha is sending:
                        Code:
                        ...in ([Character])...
                        I turned debugging on inside MySQL so I could watch the queries come across and alpha is sending
                        Code:
                        ... in ('1,2,3,4') ...
                        If I had to guess, I bet it does this to prevent sql injection. Meaning that it always makes sure the data submitted is never unquoted which will prevent malicious input from running its own sql statement.

                        I went to lunch after I started typing this and I see that marvinbase has come to the same conclusion.

                        Comment


                          #13
                          Re: SQL Convert() in WHERE clause

                          Create a view based on your SQL statement
                          Bind your grid to that view

                          This will work, but you wont be allowed to update the grid.
                          Scott Moniz - Computer Programmer/Analyst
                          REA Inc.
                          http://reainc.net
                          (416)-533-3777
                          [email protected]

                          REA INC offers consulting services, programming services, systems design, database design, third party payment gateway integration (CHASE, PAYPAL, AUTHORIZE.NET) and developer support.
                          If you need custom code, or 1-to-1 mentoring in any facet of your database/web application design,
                          contact us to discuss options.

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