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How to check whether a Column exists in table if not then add it to the table


Posted Date: 04 May 2008    Resource Type: Code Snippets    Category: SQL

Posted By: @@@ Hyderabadi Biryani @@@       Member Level: Diamond
Rating:     Points: 10



The following code sample shows how to check whether a Column exists in table if not then add it to the table

IF NOT EXISTS (SELECT * FROM INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_NAME = ‘TEST’ AND COLUMN_NAME = ‘TEST_DATE’)
BEGIN
ALTER TABLE TEST ADD TEST_DATE DATETIME
END




Responses

Author: andy robarts    05 May 2008Member Level: Gold   Points : 2
Dim oField ' As ADODB.Field
Dim oRecordset ' As ADODB.Recordset
Dim oConn ' As ADODB.Connection
Dim nameToCheck
Dim nameExists

' The column name you're looking for
nameToCheck = "ID"
nameExists = false

' Create connection
Set oConn = Server.CreateObject("ADODB.Connection")
oConn.Open "YourConnectionString"

Set oRecordset = oConn.Execute("SELECT * FROM YourTable")

For Each oField In oRecordset.Fields
If oField.Name = nameToCheck Then
nameExists = True
Exit For
End If
Next

oRecordset.Close()
oConn.Close()
Set oConn = Nothing
Set oRecordset = Nothing

Response.Write("Field " & nameToCheck & " found: " & nameExists)


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