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How to retrieve the data from database based on condition?

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    How to retrieve the data from database based on condition?


    I have written a query using a condition as shown below:

    select * from decay;
    select * from decay where pid=2;

    For the above two queries, it is giving me only 20 arguments,
    but instead I need all rows from database.

    1. Instead I need all rows from database.
    2. The resultset's nextRow() is not returning any thing.

    I want to use each and every element in database for calculation purpose of one value.
    So, Please do help me out in solving this issue.

    Thanks & Regards,

    Re: How to retrieve the data from database based on condition?

    Need more info:

    Is this a query for a grid, something in an Alpha 5 function or are you running this query outside of Alpha?

    Your query 1 will return all rows from the database - that is what it is designed to do. Your second query will only return the data with PID = 2 - I have no way of knowing how many records that is.

    Can you give me the table structure? Maybe a screenshot of what is happenning?

    What database is the back-end? MySQL? MSSQL?


      Re: How to retrieve the data from database based on condition?

      Hi Larry Grupido,

      Thank you for your early reply.
      My query is "select * from Decay"
      While executing connection object.Resultset(conn.Resultset) its returning only 20 values
      from entire table it should return more than that,and ResultSet.nextRow() method is returning false.
      My table contains totally 16 columns.Please let me know.

      Thanks & Regards,


        Re: How to retrieve the data from database based on condition?

        You answer only one of my questions.

        Where are you running this query? Are you running it from a grid? From a function in Alpha5 or are you running it from the back-end software? What database are you using? (MYSQL? MSSQL?)

        How many records are in the table? Is Decay a table or a view? How many rows should you have with PID = 2?


          Re: How to retrieve the data from database based on condition?

          Hi Larry Grupido,

          Thanks for your reply.

          I am running the query in xbasic(A5W page).
          No, I am not running it from a grid, I am running it from a A5W page.
          I have no idea about the back - end software, I have used function to run the query.
          I have used MYSQL database.
          There are 64 records in a table.
          Decay is a table.
          With PID =2? it should have 32 rows.

          The main problem is:
          After executing conn.ResultSet , it is storing all records in results set. But, I want records row -by - row.
          I am facing problem with rs.NextRow();, it is returning false.

          So, Please let me know the solution for it.

          Thanks & Regards,


            Re: How to retrieve the data from database based on condition?

            Originally posted by Parveen View Post
            Please let me know the solution for it.
            using rs.nextRow() should work.
            are you testing for an SQL error condition ?
            to test for an error you can output conn.callresult.text to the webpage or similar


              Re: How to retrieve the data from database based on condition?

              My suggestion:

              First: Build a grid over the decay table and look at things from there. If the grid is showing all the data, then you know that Alpha5 CAN access all the data in your tables.

              If you can't see all the records in the grid, you may have a problem with the table itself.

              You need to get software, such as Navicat, that will allow you to work directly with your MYSQL tables, without using A5, and troubleshoot from there.

              If you do not have such software, how did you build the tables in the first place? How do you know how many records are in Decay?