The SQL Aggregate Function That Gives the Number of Rows

question 35

Multiple Choice

The SQL aggregate function that gives the number of rows containing non-null values for the given column is ____.

• A) COUNT
• B) MIN
• C) MAX
• D) SUM

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Definitions:

Preventive Maintenance

Routine maintenance, inspections, and servicing performed on equipment, machinery, or systems to prevent unexpected failures or breakdowns.

Product Reliability

The likelihood that a product will perform its intended function without failure over a specified period.

Accelerated Testing

A testing methodology that speeds up the normal use rate of a product to quickly observe potential failures and improve its reliability over its lifetime.

FR(%)

A notation often representing failure rate percentage, signifying the likelihood of a component or system failing within a specific time period.