Query NOT Workinng in OPEN OFFICE BASE
-
21-02-2021 - |
Pergunta
select * from "StudentMaster" where "PhoneNo" = NULL;
Syntax error!
i want to see all record which don't Have Phone number !
I have try this all thing.
select * from "StudentMaster" where "PhoneNo" NOT LIKE ('%');
select * from "StudentMaster" where "PhoneNo" NOT IN ('%');
But it show all record which have Phone Numbers but NOT NULL! Why
Solução
Adding my comment as an answer since it solved the problem:
Try IS NULL
instead of = NULL
-- I forget that myself sometimes!
I think someone that knows about mathematics would say the NULL
is nothing so an equals comparison does not work as expected.
Licenciado em: CC-BY-SA com atribuição
Não afiliado a dba.stackexchange