점검 제한 조건은 다음 표에 점검 제한 조건을 추가하려고

Question

:

CREATE TABLE TEST_A 
(
    NAME VARCHAR(55), 
    Country VARCHAR(50) 
) 

ALTER TABLE TEST_A 
    ADD CONSTRAINT CK_GBR_TO_IND 
     CHECK (Country = CASE WHEN 'GBR' THEN 'IND' ELSE COUNTRY END); 

나는 다음과 같은 오류가 점점 오전 :

Msg 4145, Level 15, State 1, Line 2
An expression of non-boolean type specified in a context where a condition is expected, near 'THEN'.

Answer 1

대신 트리거를 시도를 .. You Can't use Check Constraint to change values ...

create trigger trg_test 
on yourtable 
instead of insert 
as 
Begin 

insert into yourtable--assuming it has only country column 
select case when country='GBR' then 'IND' 
else country end 
from Inserted 

end 

Answer 2

ALTER TABLE TEST_A ADD CONSTRAINT CK_GBR_TO_IND 
CHECK (Country IN('GBR', 'IND'));