SQL Trigger showing error -

i created 2 tables 1 name courses create statement follows:

create table courses (     cid int,     cname varchar(25),     depid int,     no_sems int,      primary key(cid),     foreign key(depid) references departments ); 

another name departments follows:

create table departments (       did int,      dname varchar(20),      hod_id int,       no_courses int,       primary key (did) ); 

i wanted increment no_courses when course added courses table. hence created following trigger:

create trigger courseinc after insert on courses referencing new newcourse     update department      set no_courses = no_courses + 1      did = newcourse.depid 

but keep getting message this:

error @ line 1: pls-00103: encountered symbol ";" when expecting 1 of following:

begin case declare end exception exit goto if loop mod null pragma raise return select update while with

<< close current delete fetch lock insert open rollback savepoint set sql execute commit forall merge pipe
symbol "exit" substituted ";" continue. 1. create trigger courseinc 2. after insert on courses 3. referencing new newcourse

i not sure wrong. please help.