Challenge: Customer Signup Years
Understanding the EXTRACT Function in SQL
The EXTRACT function in SQL lets you pull out a specific part of a date or time value. For example, you can use it to get just the year, month, or day from a full date. This is especially useful when you need to group or filter data by parts of a date, like analyzing signups by year.
Example:
SELECT EXTRACT(YEAR FROM signup_date) AS signup_year FROM customers;
This statement returns only the year from each customer's signup_date. You can also use EXTRACT to get the month or day by changing the argument inside the function.
1SELECT EXTRACT(YEAR FROM DATE '2024-06-01') AS year;
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Write a query to analyze customer signups by year. Your goal is to group customers by the year of the signup_date and count the number of signups for each year.
- Extract the year from the
signup_datecolumn. - Group the customers by the extracted year.
- Count the number of customers who signed up in each year.
- Return the signup year and the corresponding signup count for each group.
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Understanding the EXTRACT Function in SQL
The EXTRACT function in SQL lets you pull out a specific part of a date or time value. For example, you can use it to get just the year, month, or day from a full date. This is especially useful when you need to group or filter data by parts of a date, like analyzing signups by year.
Example:
SELECT EXTRACT(YEAR FROM signup_date) AS signup_year FROM customers;
This statement returns only the year from each customer's signup_date. You can also use EXTRACT to get the month or day by changing the argument inside the function.
1SELECT EXTRACT(YEAR FROM DATE '2024-06-01') AS year;
Swipe to start coding
Write a query to analyze customer signups by year. Your goal is to group customers by the year of the signup_date and count the number of signups for each year.
- Extract the year from the
signup_datecolumn. - Group the customers by the extracted year.
- Count the number of customers who signed up in each year.
- Return the signup year and the corresponding signup count for each group.
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