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What would be the expected result of executing the query SELECT COUNT(DISTINCT *) FROM user on a table below:
userId username email 1 john.smith john.smith@com 2 NULL david.clear@com 3 kevin.smith kevin.smith@com
What would be the expected result of executing the query SELECT COUNT(DISTINCT *) FROM user on a table below:
| userId | username | |
|---|---|---|
| 1 | john.smith | john.smith@com |
| 2 | NULL | david.clear@com |
| 3 | kevin.smith | kevin.smith@com |
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Last updated: January 23, 2026 at 10:32A
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