SQL Server :: Updating The Tables From Another Table?
Jan 12, 2011
I have two tables master and comp table. In master table, I have columns called LB1, LB2, LB1_ID, LB2_ID and in my comp table I have ID and CompName. I need to update my master table the following way
If LB1 in master table has a value of 'XYZ' then I need to find that value in Comp Table in column compName and then put the ID from comp table to master table in LB1
master
LB1 LB2 LB1_ID LB2_ID
XYZ HIJ
ABC KLM
DEF RAW
PQR VQS
Comp
ID CompName
1 XYZ
2 ABC
3 RAW
4 DEF
5 VQS
6 HIJ
7 KLM
8 PQR
I need to poulate my master table like this
master
LB1 LB2 LB1_ID LB2_ID
XYZ HIJ 1 6
ABC KLM 2 7
DEF RAW 4 3
PQR VQS 8 5
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[Code]....
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why this update is failing? The table is connected to OK and there are appropriate values in the parameters to the subroutine, and yet the record in the table remains unchanged. I am using exactly the same code (with different parameters, obviously) to update another table and this continues to work fine.
Public Shared Sub SaveMathsSettingOptions(ByVal ID As Integer, ByVal Auto As String, ByVal Repeats As Integer, ByVal Weekly As String, ByVal ClassSheets As Integer, ByVal HomeSheets As Integer)
Dim con As New MySqlConnection(_connectionString)
Dim ret As String
Dim sql As String
sql = "UPDATE centres SET maths_auto = @maths_auto, maths_auto_reps = @maths_auto_reps, maths_weekly = @maths_weekly, maths_class_sheets = @maths_class_sheets, maths_home_sheets = @maths_home_sheets WHERE centreID = @centreID"
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cmd.Parameters.AddWithValue("@maths_auto", Auto)
cmd.Parameters.AddWithValue("@maths_auto_reps", Repeats)
cmd.Parameters.AddWithValue("@maths_weekly", Weekly)
cmd.Parameters.AddWithValue("@maths_class_sheets", ClassSheets)
cmd.Parameters.AddWithValue("@maths_home_sheets", HomeSheets)
cmd.Parameters.AddWithValue("@centreID", ID)
Try
con.Open()
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'MessageBox.Show("Error Connecting to Database: " & myerror.Message)
ret = myerror.Message
con.Close()
Finally
con.Dispose()
End Try
End Sub
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I have a form in which I display data from a database table, change the data and then update the database table. The form consists of textboxes, so all data displayed in the form is string. However - one data is int in the database table (the rest is varchar), so I need to convert it from string to int when I update the database table. How do I do it?
[Code]....
And, strangely enough, the same code doesn't work with parameters. How is that?:
[Code]....
[Code]....
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