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select customerid,concat_ws(" ",firstname,lastname) as name,timestampdiff(curdate(),Date_of_Birth,Year) as agefrom customersorder by age,customeridcorrect this

Question

select customerid,concat_ws(" ",firstname,lastname) as name,timestampdiff(curdate(),Date_of_Birth,Year) as agefrom customersorder by age,customeridcorrect this

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Solution

The corrected SQL query would be:

SELECT customerid, CONCAT_WS(" ", firstname, lastname) AS name, TIMESTAMPDIFF(YEAR, Date_of_Birth, CURDATE()) AS age 
FROM customers 
ORDER BY age, customerid;

Here's the step by step explanation:

  1. SELECT customerid, CONCAT_WS(" ", firstname, lastname) AS name, TIMESTAMPDIFF(YEAR, Date_of_Birth, CURDATE()) AS age: This part of the query is selecting the columns that you want to display in your final result. The CONCAT_WS function is used to concatenate the firstname and lastname with a space in between. The TIMESTAMPDIFF function is used to calculate the age of the customer by subtracting the Date_of_Birth from the current date (CURDATE()).

  2. FROM customers: This part of the query specifies the table from which to retrieve the data.

  3. ORDER BY age, customerid;: This part of the query is used to sort the result set by age and customerid. If two customers have the same age, they will be ordered by their customerid.

This problem has been solved

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