assessing knowledge of SQL, MongoDB, NoSQL
assessing knowledge of MongoDB
SQL | Customer Data - Find all the customers whose first and last names are not unique in this database, as well as the number of times each first and last name pair appears in the database.
assessing knowledge of SQL, MySQL
SQL | Customer Data - Find all the customers whose first and last names are not unique in this database, as well as the number of times each first and last name pair appears in the database.
assessing knowledge of SQL
SQL | Books | find books without ratings - Select all title of the books which have no rating.
assessing knowledge of SQL
MSSQL - Rewards Program - Write a query which will find the top 3 ranked customers according to the revenue they created with all of their orders
The candidate will be asked to solve two simple SQL queries related to a database with books and reviews data.
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