How to auto increment database column in Java derby?

Question

Here's the SQL I've tried so far to create the table

CREATE TABLE tblPosts (nId INTEGER PRIMARY KEY GENERATED ALWAYS AS IDENTITY,
strContent VARCHAR(140) NOT NULL,
strLink VARCHAR(200),
strImage VARCHAR(200));

using

String sql = "INSERT INTO tblPosts VALUES ('" + textFieldContent.getText() + "', '" + 

textFieldLink.getText() + "', '" + textFieldImage.getText() + "')";

I get an error telling me I'm not providing the nId column value which I'm not but if the column auto-increments I'm not supposed to right?

I've also tried using the IDE to create the table on the database as described here

Alter a table column with auto increment by 1 in derby

Same response though. Any suggestions?

Answer 1

You need to include Start with 1, Increment by 1 Like this

CREATE TABLE tblPosts (nId INTEGER PRIMARY KEY GENERATED ALWAYS AS IDENTITY(Start with 1, Increment by 1), 
strContent VARCHAR(140) NOT NULL, 
strLink VARCHAR(200)