Posted inMY SQL Oracle PL/SQL SQL

IF ELSE Statement

In the world of SQL Server, conditional logic is a powerful tool that enables developers to execute specific actions based on certain conditions. Among the most commonly used constructs for implementing conditional logic is the IF ELSE statement. This versatile control-flow tool allows you to make decisions and dictate the flow…
sql limit
Posted inMY SQL Oracle PL/SQL SQL

SQL LIMIT

Summary: in this tutorial, you’ll learn to use the SQL LIMIT clause to limit the number of rows returned from a query. Introduction to SQL LIMIT clause  To limit the number of rows returned by a SELECT statement, you use the LIMIT and OFFSET clauses. Here’s the syntax of LIMIT & OFFSET clauses: SELECT column_list FROM table1 ORDER BY column_list LIMIT row_count…
sql distinct
Posted inSQL Server MY SQL Oracle PL/SQL

SQL DISTINCT

Summary: in this tutorial, you will learn how to use the SQL DISTINCT operator to select distinct values from a table. Introduction to SQL DISTINCT operator  To select the distinct values from a column of a table, you use the DISTINCT operator in the SELECT clause as follows: SELECT DISTINCT column1 FROM table_name; In this syntax,…
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…