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Which of the following is the correct syntax for using COALESCE in SQL?

easy📝 Syntax Q3 of 15
SQL - CASE Expressions
Which of the following is the correct syntax for using COALESCE in SQL?
ACOALESCE(expression1, expression2, ..., expressionN)
BCOALESCE(expression1 = expression2)
CCOALESCE(expression1, expression2) WHERE condition
DCOALESCE(expression1; expression2)
Step-by-Step Solution
Solution:

  1. Step 1: Recall COALESCE syntax

    COALESCE takes a comma-separated list of expressions inside parentheses.

  2. Step 2: Check options for correct syntax

    Only COALESCE(expression1, expression2, ..., expressionN) matches the correct syntax format.

  3. Final Answer:

    COALESCE(expression1, expression2, ..., expressionN) -> Option A

  4. Quick Check:

    COALESCE syntax = comma-separated expressions in parentheses [OK]
Quick Trick: Use commas between expressions inside COALESCE parentheses [OK]
Common Mistakes:
  • Using semicolons instead of commas
  • Trying to use WHERE inside COALESCE
  • Using equality inside COALESCE arguments

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