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A coffee shop wants to calculate the total number of coffee cups sold. What query would accomplish this?

A data analyst at an e-commerce company writes this query to preview orders: What is the best optimization to apply before running the query on the full dataset?

A hospital prepares the following query to transform customer details. What will this query show if the city is “Chicago”?

You’re supporting the HR department. They need to identify employees in Chicago whose names start with “An”. You write the following query: Why is this query inefficient?

What will be the result of this query?

An operations analyst monitors inventory at a warehouse. What will this query show if the product name is “laptop”?

A technology company stores and analyzes customer data. What will this query show if the city is “San Francisco”?

An airline stores flight codes, and they want them cleaned and standardized. What will this query show if the flight code is ” aa123 “?

In a dataset, a feature  has a mean and variance . Suppose a new transformed feature is defined as . What is the expected value of the squared transformed feature, ?

To connect a computer to a switch or network wall outlet, a ___________________cable (also known as a patch cable) is used.