Question

Use concatenate data and how use the SUBSTRING function,: Write a query that would format the telephone number so that it will display in the following structure: (775) 784-5611. and sort the output by employeename,

Answer 1

The query uses SQL functions CONCAT and SUBSTRING to format phone numbers in the structure '(xxx) yyy-zzzz'. It extracts and concatenates specific parts of the phone number. The results are sorted alphabetically by employee name.

Step-by-step explanation:

In this SQL query, the CONCAT function is used to concatenate strings, and the SUBSTRING function is used to extract specific parts of the phone number. The phone number is formatted as ('xxx') yyy-zzzz, where xxx represents the area code, yyy represents the first three digits, and zzzz represents the last four digits.

The SUBSTRING function takes three parameters: the string to extract from, the starting position, and the length. For the area code, we extract the first 3 characters starting from position 1. For the first three digits, we start from position 4 and extract 3 characters. For the last four digits, we start from position 7 and extract 4 characters. The CONCAT function then combines these substrings into the desired format.

Finally, the ORDER BY clause is used to sort the output by EmployeeName. This ensures that the results are displayed in alphabetical order based on the employee names.

In summary, the query transforms the raw phone numbers into a formatted structure and presents the results in alphabetical order by employee name.