Error while adding a new col with check constriant

Question

Hello
I tried adding a new column with check constraint but giving the error please correct me..
drop table testchk
create table testchk(typenm varchar2(5))
insert into testchk values('mon')
alter table testchk add typechk varchar2(5) default 'both' constraint chk_test check(typechk in('m','d') and typechk is not null)For the alter comman getting the ORA-02293 cannot validate error..
I dont want to create any other constriant like not null etc .. but need only one check constriant
Thanks

Answer 1

You cannot assign a default value = 'both' while the constraint allows only 'm' or 'd'.
This will work:
ALTER TABLE testchk ADD typechk VARCHAR2(5) DEFAULT 'both'
CONSTRAINT chk_test CHECK(typechk IN('m','d', 'both') AND typechk IS NOT NULL);Edited by: kordirko on 2010-05-14 18:41