java - create table user("user_id int auto_increment"); not working in derby (embedded database) -

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i new in derby library. why got error when use auto_increment in query?

here java code

 this.conn.createstatement().execute(create table user("user_id int auto_increment, primary key(user_id))");

i tried in mysql server , works in derby got error

java.sql.sqlsyntaxerrorexception: syntax error: encountered "auto_increment" @ line 1

why got error?

derby not have auto_increment keyword. in derby need use identity columns implement auto increment behaviour

for example

create table students ( id integer not null generated identity (start 1, increment 1), name varchar(24) not null, address varchar(1024), constraint primary_key primary key (id) ) ;

above statement create student table id auto increment column , primary key well.

hope helps


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