sql order by
Posted inSQL Server MY SQL Oracle PL/SQL

SQL ORDER BY

Summary: In this tutorial, you’ll learn how to use the SQL ORDER BY clause to sort the result set based on values of one or more rows in ascending or descending orders. Introduction to SQL ORDER BY clause  The ORDER BY is an optional clause of the SELECT statement. The ORDER BY clause allows you to sort the…
SQL Sample Database
Posted inMY SQL Oracle PL/SQL SQL

SQL Sample Database

Summary: in this tutorial, you will learn about a SQL Sample Database called HR that manages the HR data of the small businesses. The following database diagram illustrates the HR sample database: SQL Sample Database The HR sample database has seven tables: The employees table stores the data of employees. The jobs table stores…
SQL SELECT
Posted inMY SQL Oracle PL/SQL SQL

SQL SELECT

Summary: in this tutorial, you will learn how to use the SQL SELECT statement to query data from a single table. Introduction to SQL SELECT statement The SELECT statement allows you to retrieve data from one or more tables. Here’s the basic syntax of the SELECT statement that retrieves data…
sql syntax
Posted inMY SQL Oracle PL/SQL SQL

SQL Syntax

Summary: in this tutorial, you’ll learn about SQL syntax that helps you to write SQL statements effectively. SQL Syntax Getting started with SQL syntax  SQL (Structured Query Language) is the language you use to communicate with the databases. SQL is a declarative language. It means you tell the database what you want, not how to get…
What Is SQL
Posted inSQL Server MY SQL Oracle PL/SQL

What Is SQL

What Is SQL Summary: In this tutorial, you’ll understand the databases and SQL, the standard language for interacting with the databases. what is sql Introduction to databases  A database is a structured collection of data stored on a computer. It is a powerful tool for storing and organizing data efficiently.…
SELETCT in WHERE Clause
Posted inSQL MY SQL Oracle PL/SQL

SELECT in WHERE clause

SELECT in WHERE clause select in where clause In SQL Server, the SELECT statement within a WHERE clause is a powerful technique used to filter records based on a condition derived from another query. This is commonly achieved using a subquery, which is a query nested inside another query. Subqueries can return a single…
How to find if a foreign key exists
Posted inSQL

How to find if a foreign key exists

How to find if a foreign key exists How to find if a foreign key exists Foreign keys are a crucial part of database integrity in SQL Server, ensuring relationships between tables remain consistent. When working with databases, you might need to check whether a foreign key exists before creating, modifying,…
sql interview question
Posted inSQL

SQL interview questions with answers

SQL interview questions with answers Whether you’re preparing for a SQL Server interview or just want to sharpen your T-SQL skills, practical questions and hands-on SQL queries are the best way to learn. This article covers common and advanced SQL interview questions with answers that are often asked in technical interviews, complete…