Date check constraint
Please can I get some help with a check constraint.The Table is called the TITLE and the attribute is TI_RELDATE (a date). I am wanting to make sure that it is between 1930 and the date of the day.
Is this something like this:
CONSTRAINT TITLE_ck_TI_RELDATE CHECK (TI_RELDATE between 1930 and GETDATE())
Canning
GETDATE()-based you come from the side of SQL Server of the barrier. Literals in Oracle date are 'yyyy-mm-dd ". Now the part 'getdate '. What exactly are you trying to do? Make sure that the inserted/updated date to date is not a later date? If so, you need a trigger for this. Check constraint can do is make sure you inserted/updated date is 1930 or higher:
alter table tbl
add constraint tbl_chk1
check(
dt >= date '1930-01-01'
)
/
Switch to make sure that the inserted/updated date to date is not a later date:
create or replace
trigger tbl_bir
before insert
or update
of tbl
for each row
begin
if dt > sysdate
then
raise_application_error(-20900,'Column dt value can't be a future date.');
end if;
end;
/
SY.
Tags: Database
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Hello
You could help me with this?
Thanks in advance for your helpcreate table test_1 ( xxx number (1), yyy number(1), zzz number(1), sss date check (sss < .......));
Chanchal Wankhade wrote:
HelloSQL> create table table_name (id number, tdate date check (jdate < sysdate)); create table table_name (id number, tdate date check (jdate < sysdate)) * ERROR at line 1: ORA-02438: Column check constraint cannot reference other columns
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Hi Experts,
I have obligation to create a check on a column constraint (Number (6.2)) is where in the max value must be less than 4000.
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Hello
RV says:
Hi Experts,
I have obligation to create a check on a column constraint (Number (6.2)) is where in the max value must be less than 4000.
But the column already has the data of more than 4000. Also, I can't delete the data that is already present in the table.
I'm just using an alter command
SQL > alter table test add constraint CC_A (one check<>
Error is:
SQL error: ORA-02293: cannot validate (CC_A) - violated check constraint
02293 00000 - "can't validate (s.%s) - violated check constraint.
* Cause: an alter table operation tried to validate a check constraint to
populated table that has nocomplying values.
Can you suggest me work around him?
Kind regards
RV
You can specify NOVALIDATE ACTIVATE when you create the constraint.
ALTER TABLE test
ADD CONSTRAINT cc_a CHECK (one<>
ENABLE NOVALIDATE
;
The constraint does not apply to the values already in the table, but if you update a column where the condition is violated, the constraint applies to the new value.
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