What are Triggers and Rules?
Answers were Sorted based on User's Feedback
Answer / rajendra prasad reddy penumall
these two are SQL concepts
TRigger is a special type of stored procedure that
automatically takes effect when the data in a specified
table is modified.
triggers invoked in response to an INSERT,UPDATE OR DELETE
STATEMENT EXECUTED.
TRIGGERS are used to handle some exceptional conditions
if u r moving data 40 MB into data base,But data base having
only 30 mB free space then the trigger fires automatically
and the entire transaction automativcally roll backs.
Rules:
Rules are database objects used to enforce data integrity.
this object bound to column or userdefined data types.
to ensure that only valid values are allowed to insert in
to columns.
so trigger acts automatically nad rollbacks the transaction
when error is occured.
rule is used to enforce data integrity on a column or user
defined data type.
are you clear if you want any clarification please mail to
me.
Is This Answer Correct ? | 12 Yes | 2 No |
Answer / yamuna.g
Triggers are special user defined actions usually in the
form of stored procedures that are automatically invoked by
the server based on data related events. It can perform
complex actions and can use the full power of procedural
languages.
A rule is a special type of trigger that is used to perform
simple checks on data.
Is This Answer Correct ? | 8 Yes | 1 No |
What are 5 common uses of nitrogen?
How to send 10,000 mail?
Until the early 1960s, what group of elements were called the inert gases?
What is a substituted hydrocarbon?
What is the chemical formula of detergent?
Is benzene a polar molecule?
Carbohydrates are made of what three elements?
What gas was discovered by daniel rutherford in 1772 by placing a mouse inside a bell jar, removing all the oxygen in the jar by burning a substance in it, and demonstrating the asphyxiation of the mouse?
Explain what are the building blocks of client server?
What is a hydrogen bond?
Convert -40of into centigrade?
What is a File server?
1 Answers CarrizalSoft Technologies, HCL,