SQL Server Course for Beginners with 100+ examples - UNIQUE Constraint

The video tutorial explains how to use the SQL count function to determine the number of rows that meet specific criteria. It demonstrates fetching records from an employee table and using the count function with and without conditions, such as counting employees with salaries above a certain amount. The tutorial also covers counting all records in a table using the count function with a wildcard.

What is the primary purpose of using the COUNT function in SQL?

• To calculate the sum of all values in a column

• To sort the data in a table

• To find the average value of a column

• To count the number of rows that meet a specific condition

Which SQL clause is used to specify the condition for counting rows?

• WHERE

• HAVING

• ORDER BY

• GROUP BY

How many employees have a salary greater than 7000 in the example provided?

• Two

• Three

• Four

• Five

What symbol is used with the COUNT function to count all records in a table?

• Hash (#)

• Percentage (%)

• Dollar ($)

• Asterisk (*)

What is the result of executing COUNT(*) on the employee table in the example?

• Seven

• Four

• Five

• Six