Bird
0
0

What is the main purpose of a BEFORE trigger in SQL?

easy📝 Conceptual Q11 of 15
SQL - Triggers
What is the main purpose of a BEFORE trigger in SQL?
ATo execute code after data is inserted or updated
BTo delete data automatically
CTo execute code before a data modification happens
DTo create a backup of the database
Step-by-Step Solution
Solution:

  1. Step 1: Understand trigger timing

    A BEFORE trigger runs before the data change happens, allowing checks or modifications.

  2. Step 2: Compare options

    To execute code before a data modification happens correctly states the trigger runs before data modification. Options A, C, and D describe other actions not related to BEFORE triggers.

  3. Final Answer:

    To execute code before a data modification happens -> Option C

  4. Quick Check:

    BEFORE trigger = runs before data change [OK]
Quick Trick: BEFORE triggers run before data changes happen [OK]
Common Mistakes:
  • Confusing BEFORE with AFTER triggers
  • Thinking triggers delete data automatically
  • Assuming triggers create backups

Want More Practice?

15+ quiz questions · All difficulty levels · Free

Free Signup - Practice All Questions
More SQL Quizzes
Advanced Window Functions - FIRST_VALUE and LAST_VALUE - Quiz 14medium Advanced Window Functions - Running totals with SUM OVER - Quiz 10hard Common Table Expressions (CTEs) - Recursive CTE for hierarchical data - Quiz 7medium Indexes and Query Performance - CREATE INDEX syntax - Quiz 13medium Indexes and Query Performance - Unique index behavior - Quiz 13medium Stored Procedures and Functions - Function vs procedure decision - Quiz 10hard Transactions and Data Integrity - ACID properties mental model - Quiz 12easy Transactions and Data Integrity - Savepoints within transactions - Quiz 15hard Window Functions Fundamentals - Why window functions are needed - Quiz 11easy Window Functions Fundamentals - NTILE for distribution - Quiz 6medium