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Which SQL feature typically prevents a view from being updatable?

easy📝 Conceptual Q2 of 15
SQL - Views
Which SQL feature typically prevents a view from being updatable?
AUsing a WHERE clause
BSelecting columns directly from one table
CUsing simple column aliases
DIncluding a JOIN between two tables
Step-by-Step Solution
Solution:

  1. Step 1: Identify features that block updates

    Views that join multiple tables usually cannot be updated because the database cannot determine which table to update.

  2. Step 2: Evaluate options

    WHERE clauses and aliases do not prevent updates; selecting from one table is allowed. JOINs cause the limitation.

  3. Final Answer:

    Including a JOIN between two tables -> Option D

  4. Quick Check:

    JOINs block updatable views [OK]
Quick Trick: JOINs in views usually stop updates [OK]
Common Mistakes:
MISTAKES
  • Assuming WHERE clauses block updates
  • Confusing aliases with update restrictions
  • Thinking single-table selects are not updatable

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