System Developer Interview Questions and Answers

I do not have the available data on the number of scientific calculators sold in the state in January.

• Data on the number of scientific calculators sold in the state in January is not available.

• It would require access to sales records or reports from retailers to determine the exact number of scientific calculators sold.

• One could potentially estimate the number based on average sales figures for scientific calculators in the state.

A join query is used to retrieve data from multiple tables by linking them based on a common column.

• Use JOIN keyword to combine tables based on a related column

• Specify the columns to be retrieved using SELECT statement

• Use WHERE clause to specify the condition for joining the tables