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SQL developer interview questions and tests
valutare la conoscenza di SQL, PostgreSQL
valutare la conoscenza di PostgreSQL, SQL
SQL | PostgreSQL | Music Store | Time function - Calculate the duration of all songs in each cd and output a list.
valutare la conoscenza di Pensiero logico, SQL
valutare la conoscenza di SQL
SQL | PostgreSQL | Hotels - average prices - Prepare the report with the average prices in the cities.
valutare la conoscenza di Pensiero logico, SQL
valutare la conoscenza di SQL
SQL | PostgreSQL | Hotels - bookings - Prepare the booking list with a number of days, price per day and total price of the stay.
valutare la conoscenza di Pensiero logico, SQL
SQL | PostgreSQL | Hotels - cities and top hotels - Prepare a list of cities with the date of last reservation and a main photo (photos[0]) of the most popular (by number of bookings) hotel in this city.
valutare la conoscenza di Java, Spring Boot
valutare la conoscenza di PostgreSQL, SQL
Java | Spring Boot | Items Retriever Microservice - Implement a microservice to retrieve items from the shopping system.
valutare la conoscenza di SQL
valutare la conoscenza di SQL
SQL | PostgreSQL | Hotels - hotels page optimization - Improve the performance of the the hotels listing page which currently uses ORM.
valutare la conoscenza di SQL, MongoDB, NoSQL
valutare la conoscenza di 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.
valutare la conoscenza di 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.
valutare la conoscenza di SQL
PostreSQL - Rewards Program - Write a query which will find the top 3 ranked customers according to the revenue they created with all of their orders
