Customer Information with Country Codes solved in SQL

This SQL script is designed to fetch customer information from a database. The information includes the customer's ID, name, and phone number. Additionally, the script also retrieves the country code associated with each customer, which is stored in a separate table. The country code is then concatenated with the phone number to provide a complete contact number.

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Here is the Customer Information with Country Codes solved in SQL from HackerRank using CodeRankGPT:

The script uses a SELECT statement to fetch the required fields from the 'customers' table. It then performs a LEFT JOIN with the 'country_codes' table to add the country code for each customer. The JOIN is based on the 'country' field present in both tables. The CONCAT function is used to combine the country code and the phone number into a single string. Finally, the results are ordered by the 'customer_id' field.


SELECT 
      a.customer_id,a.name,concat("+",b.country_code,a.phone_number)
FROM  
      customers as a
LEFT  
      join country_codes as b 
ON    
      a.country=b.country
ORDER BY  
      a.customer_id;

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