Which is better in performance - CONSTRAINT or TRIGGER over
a column which restricts say an input of particular value
in a column of a table?
Answers were Sorted based on User's Feedback
Answer / jerry joseph
Restricting the input using CONSTRAINT will have better
performance but there is a limit to the types of constraints
which we can provide..
With TRIGGERS you have more flexibility and provide a more
variety restrictions to the input.. for example you can
prevent a normal delete and make it a soft delete by setting
an IsDeleted flag using trigger.. we cant have that kind of
flexibility using Constraints..
|Is This Answer Correct ?||6 Yes||1 No|
Answer / monal
Constraints gets evaluated before statement can be either
inserted or deleted or updated. While trigger executes
after or at the same time statement is executing. So if you
have to roll back transactio because transaction not
meeting condition there is no overhead when you are using
constraint ,but if you have to roll back transaction and
you have a trigger on that table or column either 1
transaction goes through before rolling back. So basically
trigger consumes more resources.
|Is This Answer Correct ?||7 Yes||3 No|
Answer / guest
Constraint is better in terms of performance for same
|Is This Answer Correct ?||0 Yes||3 No|
Differencr Between DELETE and TRUNCATE?
What is the maximum size of a row in sql server?
Why would you use sql agent?
How much space does sql server 2016 take?
What do you understand by user-defined function in the sql server?
What is scan table/view and seek table/view when its occurs? : sql server database administration
What is always encrypted?
How to convert numeric expression data types using the cast() function?
How many files can a database contain in sql server?how many types of data files exists in sql server? How many of those files can exist for a single database?
Difference Between varchar and nvarchar datatype?
What do you mean by subquery?
Why do we need different type of parameter?