Update data automatically in sql server 2005 based on condition proplem

Question

Hi guys i have problem I have two table
First one is
Second One is Vacation
as relation one to many (vacation has foreign key of Contract No OF Table Contract) 
what i need is to update Contract table with field status =Finish where start vacation date >end contract Date
How i do that in sql server 2005 to make update automatically
Ex
contract table
status             nvarchar(20)
end contract    date time
vacation table
start vacation date time
end vacation date time
start vacation date is 23/10/2014
and End
is 26/10/2014
Now not update status in contract table to finish because vacation date start is less from end contract
but when date today is 27/10/2014 update contract table field status to finish
automatically with sql server 2005 
How i do that condition to make update to data automatically based on changing on date
Update statement i need is 
update Contract set status = finish where start vacation>end contract
but problem how i write this statement to update data automatically based on date today

Answer 1

Please post DDL, so that people do not have to guess what the keys, constraints, Declarative Referential Integrity, data types, etc. in your schema are. Learn how to follow ISO-11179 data element naming conventions and formatting rules. Temporal data should
use ISO-8601 formats. You failed again. Code should be in Standard SQL as much as possible and not local dialect. 
This is minimal polite behavior on SQL forums. Now we have to write the DDL that you did not bother with! What you did post was wrong! There is no key or constraints. There is no generic “status” in RDBMS; a "<something in particular>_status"
is a state of being, so it needs a temporal duration. The correct idiom for this data model is: 
CREATE TABLE Vacations
(vacation_contract CHAR(15) NOT NULL PRIMARY KEY,
 vacation_start_date DATE NOT NULL,
 vacation_end_date DATE,
 CHECK(vacation_start_date < vacation_end_date),
Oh, a field is nothing like a column. You need to read a basic SQL or RDBMS book; you do not know the basics. 
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