What are Database Keys?
Each database has one or more tables having rows and columns. Keys in the Database are columns or groups of columns that are used to identify rows in tables. These…
SQL IN Operator
SQL IN operator or IN condition is a logical operator that allows testing if a specified value matches any values in a provided list. It allows users to specify multiple…
SQL ORDER BY Clause
We use the ORDER BY clause in SQL-based SELECT statement. We use this clause when we want to sort the rows returned by a SELECT statement in either ascending or…
SQL DISTINCT Statement
SQL DISTINCTstatements are used to return unique values from a table. There can be many occasions in a table where we can have duplicate values for certain columns. So DISTINCT…
SQL WHERE clause
WHERE a clause in SQL (Structured Query Language) is a keyword that is used to specify a condition when fetching the data from a single or multiple tables. If the…
What is Data Modelling? Overview and Concepts
Data Modelling techniques have been around in the IT (Information Technology) sector for many decades. It is creating a visual representation of different data points and structure connections. The main…
What is Data Steward?
As information technology (IT) businesses have grown and matured, organizations have become more dependent on data to drive their businesses. In today's organization, it is important to have control over…
Transaction Isolation Level in Database
Relational databases are one of the actively used applications in current Information technology-based companies. They are mainly used to retrieve, store, update and delete information for many verticals like financial…
Database Tutorials
The database is an organized collection of related data or information that is treated as a single unit. The main purpose of the database is to store, collect, and retrieve…
What is ETL (Extract, Transform and Load) Process?
Understanding ETL (Extract, Transform, and Load) ETL is an abbreviation of the Extract, transform, and load. It is a process that is used to extract data from various sources and…