Database Systems MCQs – Certification Test 336

Aggregate Functions Quiz (Question 336) – Study App & e-Book Download

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MCQ 336: All aggregate operations, return a value of null when applied on an:

Avg collection
Sum collection
Data collection
Empty collection

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Aggregate Functions Quiz App & e-Book – Database Systems Placement Tests

Additional Basic Operations Test 347

Transaction Isolation Levels Test 348

Encryption and Applications Test 349

Set Operations Test 350

Database Design Test 351

View of Data Test 352

Encryption and Applications Test 353

View of Data Test 354

Relational Algebra Test 355

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