wbmorapedi
asked on
Using servlets to Insert some values in Ms Access db?
Let say you have three fields in a database and one of the fields hold the primary key. Now you want to add two values of the other fields using servlets such that the primary key is automatically added automatically(i.e auto- number) with each an every record added for the two fields.Coz I am encounting errors like the destination fields are not equal when i send the two fields excluding the primary key.
When I assign a null value to a primary key this is what I get
Cannot connect java.sql.SQLException: [Microsoft][ODBC Microsoft Access Driver] You tried to assign the Null value to a variable that is not a Variant data type.
When I assign a null value to a primary key this is what I get
Cannot connect java.sql.SQLException: [Microsoft][ODBC Microsoft Access Driver] You tried to assign the Null value to a variable that is not a Variant data type.
pellep
What database are you using. Most databases allow you to specify a field as 'identity' with auto-increment. This means that the value of the field gets set by the DBMS when you insert new rows.
and,
when you write to the db leave the primary key field null.
i.e.
example: insert into something one, two, three values "null", "something", "something"
Where one is your pk.
when you write to the db leave the primary key field null.
i.e.
example: insert into something one, two, three values "null", "something", "something"
Where one is your pk.
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The points, thank you!