VB.NET Custom ID column












-1















The code I have below works fine, although I'm worried about ID collisions, and I really don't like generating the ID in .NET - I'd much rather have the database do it, but I'm struggling.



When I insert a new row, I check the TableCounts table for the row count on the table I'm updating, add one to it, and then insert the new row with the ID that is created. It's been bothering me for a while that there's a much better way to do this and I'm missing it.



I know collisions are unlikely but any help on improving this method would be appreciated.



My ID is made of the first 4 characters are the shop id and the rest are the job id.



Query.CommandText = "SELECT `Count` FROM `TableCounts`
WHERE `TableName`='Refunds'
AND `LocationID`='" & MiscClass.LocationID & "'
LIMIT 1;"
tmpid = MiscClass.LocationID & "1" & (Query.ExecuteScalar() + 1).ToString
Query.CommandText = "UPDATE `TableCounts`
SET `Count`=`Count`+1
WHERE `TableName`='Refunds'
AND `LocationID`='" & MiscClass.LocationID & "';"
Query.ExecuteNonQuery()


The & above is like . in php - it concatenates.



The db is syncing with another remote db and changes can happen on the other db before the sync, so I'm trying to avoid overwriting rows.










share|improve this question





























    -1















    The code I have below works fine, although I'm worried about ID collisions, and I really don't like generating the ID in .NET - I'd much rather have the database do it, but I'm struggling.



    When I insert a new row, I check the TableCounts table for the row count on the table I'm updating, add one to it, and then insert the new row with the ID that is created. It's been bothering me for a while that there's a much better way to do this and I'm missing it.



    I know collisions are unlikely but any help on improving this method would be appreciated.



    My ID is made of the first 4 characters are the shop id and the rest are the job id.



    Query.CommandText = "SELECT `Count` FROM `TableCounts`
    WHERE `TableName`='Refunds'
    AND `LocationID`='" & MiscClass.LocationID & "'
    LIMIT 1;"
    tmpid = MiscClass.LocationID & "1" & (Query.ExecuteScalar() + 1).ToString
    Query.CommandText = "UPDATE `TableCounts`
    SET `Count`=`Count`+1
    WHERE `TableName`='Refunds'
    AND `LocationID`='" & MiscClass.LocationID & "';"
    Query.ExecuteNonQuery()


    The & above is like . in php - it concatenates.



    The db is syncing with another remote db and changes can happen on the other db before the sync, so I'm trying to avoid overwriting rows.










    share|improve this question



























      -1












      -1








      -1








      The code I have below works fine, although I'm worried about ID collisions, and I really don't like generating the ID in .NET - I'd much rather have the database do it, but I'm struggling.



      When I insert a new row, I check the TableCounts table for the row count on the table I'm updating, add one to it, and then insert the new row with the ID that is created. It's been bothering me for a while that there's a much better way to do this and I'm missing it.



      I know collisions are unlikely but any help on improving this method would be appreciated.



      My ID is made of the first 4 characters are the shop id and the rest are the job id.



      Query.CommandText = "SELECT `Count` FROM `TableCounts`
      WHERE `TableName`='Refunds'
      AND `LocationID`='" & MiscClass.LocationID & "'
      LIMIT 1;"
      tmpid = MiscClass.LocationID & "1" & (Query.ExecuteScalar() + 1).ToString
      Query.CommandText = "UPDATE `TableCounts`
      SET `Count`=`Count`+1
      WHERE `TableName`='Refunds'
      AND `LocationID`='" & MiscClass.LocationID & "';"
      Query.ExecuteNonQuery()


      The & above is like . in php - it concatenates.



      The db is syncing with another remote db and changes can happen on the other db before the sync, so I'm trying to avoid overwriting rows.










      share|improve this question
















      The code I have below works fine, although I'm worried about ID collisions, and I really don't like generating the ID in .NET - I'd much rather have the database do it, but I'm struggling.



      When I insert a new row, I check the TableCounts table for the row count on the table I'm updating, add one to it, and then insert the new row with the ID that is created. It's been bothering me for a while that there's a much better way to do this and I'm missing it.



      I know collisions are unlikely but any help on improving this method would be appreciated.



      My ID is made of the first 4 characters are the shop id and the rest are the job id.



      Query.CommandText = "SELECT `Count` FROM `TableCounts`
      WHERE `TableName`='Refunds'
      AND `LocationID`='" & MiscClass.LocationID & "'
      LIMIT 1;"
      tmpid = MiscClass.LocationID & "1" & (Query.ExecuteScalar() + 1).ToString
      Query.CommandText = "UPDATE `TableCounts`
      SET `Count`=`Count`+1
      WHERE `TableName`='Refunds'
      AND `LocationID`='" & MiscClass.LocationID & "';"
      Query.ExecuteNonQuery()


      The & above is like . in php - it concatenates.



      The db is syncing with another remote db and changes can happen on the other db before the sync, so I'm trying to avoid overwriting rows.







      mysql sqlite






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited 13 mins ago









      Paul White

      52.1k14278450




      52.1k14278450










      asked Jun 5 '17 at 18:52









      Scott MScott M

      1




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