Database Normalization
Find the third highest salary in a table.
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To find the third highest salary in a table, you can use a simple ORDER BY and LIMIT clause in SQL.
Finding the average price of products in the "Electronics" category
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The goal is to find the average price of all products in the "Electronics" category. To do this, we can write a SQL query that returns the average price of all products in the "Electronics" category.
Find the Second Highest Salary in a Table
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This technical problem involves finding the second highest salary in a table. An example input and output is provided.
Query to find all products that cost more than $10
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This technical problem deals with finding all products that cost more than $10 from a list of products and their prices.
Normalizing a Library Database
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A library database needs to be normalized in order to improve efficiency and data integrity. The library_id, book_id, and user_id fields need to be included in separate tables with the corresponding shelf, title, author, checkout_date, and due_date fields.
Find the average price of all products in a database table.
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Write a SQL query to find the average price of all products in a database table.
Get Total Revenue for Each Customer
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This technical problem involves writing a SQL query that returns the total revenue for each customer. The table schema is provided, and an example input and output are also given.
Total product quantity ordered by customer
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Write a SQL query that returns the total quantity of each product ordered by each customer.
