SQL is a database language, used to update databases, execute queries, and manage permissions. It was designed for relational database management systems. It’s generally considered a declarative language. It's been around in some form since the 70s and is just about as ubiquitous as data management itself. The model was first introduced in a...

What does a SQL FULL JOIN return? FULL JOIN returns all matching records from both tables whether the other table matches or not.FULL JOIN can potentially return very large datasets.FULL JOIN and FULL OUTER JOIN are the same.  The SQL FULL JOIN syntax The general syntax is: SELECT column-namesFROM table-name1 FULL JOIN...

SQL often called Structured Query Language is a declarative and multi-paradigm language that is the domain-specific language used for designing and managing data models to organize the data in relational model databases. SQL was designed by Donald Chamberlin and Raymond Boyce. SQL first appeared in 1974. SQL is static typing and strong...

Data modeling (data modelling) is the process of creating a data model for the data to be stored in a Database. This data model is a conceptual representation of Data objects, the associations between different data objects and the rules. Data modeling helps in the visual representation of data and enforces business rules, regulatory compliances,...

SQL SQL is a database computer language designed for the retrieval and management of data in a relational database. SQL stands for Structured Query Language. This tutorial will give you a quick start to SQL. It covers most of the topics required for a basic understanding of SQL and to get a feel of how it works.SQL is Structured Query...

Cassandra is a fully distributed, masterless database, offering superior scalability and fault tolerance to traditional single master databases. Compared with other popular distributed databases like Riak, HBase, and Voldemort, Cassandra offers a uniquely robust and expressive interface for modeling and querying data. What follows is an overview...

MySQL is an open-source relational database management system, which works on many platforms. It provides multi-user access to support many storage engines. MySQL has various features that enable us to do many tasks such as comprehensive application development, providing availability, and scalability. Now, obviously, when you work at an...

A MySQL Database Administrator (DBA) plays a crucial role in the management of MySQL database systems, overseeing various aspects of their configuration, performance, and security. A primary responsibility is the installation and configuration of MySQL databases, ensuring they are set up optimally and align with organizational requirements. DBAs...

These DATA WAREHOUSE Interview Questions have been designed specially to get you acquainted with the nature of questions you may encounter during your interview for the subject of DATA WAREHOUSE. As per my experience good interviewers hardly plan to ask any particular question during your interview, normally questions start with some basic...

A relational database can be accessed using a command or set of commands called a SQL (Structured Query Language) query. Structured sets of data kept in tables, relational databases are managed and worked with using SQL, a standard programming language. SQL queries are strong instruments for data retrieval, updating, insertion, and deletion from...