Add a Record to a Table in a Database We want to add a new record to the Customers table in the Northwind database. We first create a form ...
Add a Record to a Table in a Database
We want to add a new record to the Customers table in the Northwind database. We first create a form that contains the fields we want to collect data from:
<html> <body> <form method="post" action="demo_add.asp"> <table> <tr> <td>CustomerID:</td> <td><input name="custid"></td> </tr><tr> <td>Company Name:</td> <td><input name="compname"></td> </tr><tr> <td>Contact Name:</td> <td><input name="contname"></td> </tr><tr> <td>Address:</td> <td><input name="address"></td> </tr><tr> <td>City:</td> <td><input name="city"></td> </tr><tr> <td>Postal Code:</td> <td><input name="postcode"></td> </tr><tr> <td>Country:</td> <td><input name="country"></td> </tr> </table> <br /><br /> <input type="submit" value="Add New"> <input type="reset" value="Cancel"> </form> </body> </html> |
When the user presses the submit button the form is sent to a file called "demo_add.asp". The "demo_add.asp" file contains the code that will add a new record to the Customers table:
| <html> <body> <% set conn=Server.CreateObject("ADODB.Connection") conn.Provider="Microsoft.Jet.OLEDB.4.0" conn.Open "c:/webdata/northwind.mdb" sql="INSERT INTO customers (customerID,companyname," sql=sql & "contactname,address,city,postalcode,country)" sql=sql & " VALUES " sql=sql & "('" & Request.Form("custid") & "'," sql=sql & "'" & Request.Form("compname") & "'," sql=sql & "'" & Request.Form("contname") & "'," sql=sql & "'" & Request.Form("address") & "'," sql=sql & "'" & Request.Form("city") & "'," sql=sql & "'" & Request.Form("postcode") & "'," sql=sql & "'" & Request.Form("country") & "')" on error resume next conn.Execute sql,recaffected if err<>0 then Response.Write("No update permissions!") else Response.Write("<h3>" & recaffected & " record added</h3>") end if conn.close %> </body> </html> |
Important
If you use the SQL INSERT command be aware of the following:
- If the table contains a primary key, make sure to append a unique, non-Null value to the primary key field (if not, the provider may not append the record, or an error occurs)
- If the table contains an AutoNumber field, do not include this field in the SQL INSERT command (the value of this field will be taken care of automatically by the provider)
What about Fields With no Data?
In a MS Access database, you can enter zero-length strings ("") in Text, Hyperlink, and Memo fields IF you set the AllowZeroLength property to Yes.
Note: Not all databases support zero-length strings and may cause an error when a record with blank fields is added. It is important to check what data types your database supports.
