Databases exercises

  • How do databases work?

    Computer databases typically store aggregations of data records or files that contain information, such as sales transactions, customer data, financials and product information.
    Databases are used for storing, maintaining and accessing any sort of data.
    They collect information on people, places or things..

  • How does database perform?

    A database is an organized collection of data, stored and accessed electronically.
    Databases are used to store and manage large amounts of structured and unstructured data, and they can be used to support a wide range of activities, including data storage, data analysis, and data management..

  • What is best practice for database?

    Databases often store information about people, such as customers or users.
    For example, social media platforms use databases to store user information, such as names, email addresses and user behavior.
    The data is used to recommend content to users and improve the user experience.
    Secure personal health information..

  • WHERE can I practice DBMS?

    There are three key parts to get right when writing a JOIN in SQL.
    First, you need to specify what columns to show.
    For our artists x songs example, we'll just use SELECT * for that.
    The third and final in a SQL JOIN query is the ON clause, which explains to the RDBMS how the two tables relate to each other..

  • The typical database administrative tasks that can be performed using a DBMS include:

    Configuring authentication and authorization.
    Easily configure user accounts, define access policies, modify restrictions, and access scopes. Providing data backups and snapshots. Performance tuning. Data recovery.
Feb 1, 2023SQL Exercises, Practice, Solution: Structured Query Language (SQL) is a language used to view or change data in databases.BASIC queries on employee Exercises on movie DatabaseSql joinsSql union
Feb 1, 2023SQL statements are used to retrieve and update data in a database. The best way we learn anything is by practice and exercise questions. We have  BASIC queries on employee Exercises on movie DatabaseSql joinsSql union

Exercise 3: Selecting A Few Columns and Filtering Numeric Data in Where

Exercise: Select the columns movie_title and box_office from the table movies.
Show only movies with earnings above $300 million.
Solution: Solution explanation: List the columns in SELECT and reference the table in FROM.
Use a WHERE clause to filter the data – write the column box_office and use the ‘greater than’ operator (>) to show only values .


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