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Exam 1z0-071 topic 1 question 29 discussion

Actual exam question from Oracle's 1z0-071
Question #: 29
Topic #: 1
[All 1z0-071 Questions]

Which two statements are true about the COUNT function? (Choose two.)

  • A. COUNT(*) returns the number of rows in a table including duplicate rows and rows containing NULLs in any column.
  • B. It can only be used for NUMBER data types.
  • C. COUNT(DISTINCT inv_amt) returns the number of rows excluding rows containing duplicates and NULLs in the INV_AMT column.
  • D. COUNT(inv_amt) returns the number of rows in a table including rows with NULL in the INV_AMT column
  • E. A SELECT statement using the COUNT function with a DISTINCT keyword cannot have a WHERE clause.
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Suggested Answer: AC 🗳️
by kakamusili at Oct. 26, 2022, 3:41 a.m.

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kakamusili
Highly Voted 2 years, 2 months ago
Group functions do not consider NULL values, except the COUNT(*)
upvoted 9 times
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kay000001
Most Recent 2 months ago
Selected Answer: AC
A and C are correct.
upvoted 1 times
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TheOracleWasTaken
1 year, 5 months ago
A and C seem correct!
upvoted 4 times
...
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