Learn SQL | MS SQL |T-SQL | SQL Server | SQL tutorial for Beginners |Guide from beginner to advanced

 

Learn SQL | MS SQL | T-SQL | SQL Server | SQL tutorial for Beginners | Guide to beginner to advanced SQL is a standard language for storing, manipulating and retrieving data in databases. Our SQL tutorial will teach you how to use SQL in: MySQL, SQL Server, MS Access, Oracle, Sybase, Informix, Postgres, and other database systems. 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. Why to Learn SQL? SQL is Structured Query Language, which is a computer language for storing, manipulating and retrieving data stored in a relational database. SQL is the standard language for Relational Database System. All the Relational Database Management Systems (RDMS) like MySQL, MS Access, Oracle, Sybase, Informix, Postgres and SQL Server use SQL as their standard database language. Also, they are using different dialects, such as − MS SQL Server using T-SQL, Oracle using PL/SQL, MS Access version of SQL is called JET SQL (native format) etc. Applications of SQL As mentioned before, SQL is one of the most widely used query language over the databases. I'm going to list few of them here: Allows users to access data in the relational database management systems. Allows users to describe the data. Allows users to define the data in a database and manipulate that data. Allows to embed within other languages using SQL modules, libraries & pre-compilers. Allows users to create and drop databases and tables. Allows users to create view, stored procedure, functions in a database. Allows users to set permissions on tables, procedures and views. SQL Tutorial SQL Tutorial This SQL tutorial helps you get started with SQL quickly and effectively through many practical examples. If you are a software developer, database administrator, data analyst, or data scientist who wants to use SQL to analyze data, this tutorial is a great start. Each topic is covered clearly and concisely with many practical examples so that you can both truly understand the concept and know how to apply it to solve the data problems more effectively. SQL stands for Structured Query Language designed to manipulate data in the Relational Database Management Systems (RDBMS). Today, SQL is one of the most common programming languages for interacting with data. Section 1: Introduction to SQL What is SQL – give you a brief overview of the SQL language and its popular dialects. SQL Syntax – provide you with the syntax of the SQL language. SQL Sample Database – introduce you to an HR sample database. Section 2: Querying Data SELECT Statement – show you how to query data from a single table by using the simplest form of the SELECT statement. Section 3: Sorting Data ORDER BY Clause – sort the data by one or more columns in the ascending and/or descending order. Section 4: Filtering Data DISTINCT – show you how to remove duplicates from the result set. LIMIT – constrain a number of rows returned by a query using the LIMIT and OFFSET clause. FETCH – learn how to skip N rows in a result set before starting to return any rows. WHERE Clause – filter data based on specified conditions. Comparison operators – learn how to use the comparison operators including greater than, greater than or equal, less than, less than or equal, equal, and not equal to form the condition in the WHERE clause. Section 11: Data Manipulation Language (DML) Statements INSERT – insert one or more rows into a table. UPDATE – update existing data in a table. DELETE – delete data from a table permanently. Section 12: Data Definition Language (DDL) Statements CREATE TABLE – create a new table in the database. ALTER TABLE – modify the structure of an existing table. DROP TABLE – remove the tables permanently. TRUNCATE TABLE – delete all data in a big table fast and efficiently. Section 13: Constraints PRIMARY KEY – show you how to define a primary key for a table. FOREIGN KEY – walk you through the steps of enforcing the relationship between data in two tables using the foreign key constraint. UNIQUE – ensure the uniqueness of values in a column or a set of columns. NOT NULL – ensure that the values inserted into or updated to a column are not NULL. CHECK – validate data before it is stored in one or more columns based on a Boolean expression. Search this website GETTING STARTED What Is SQL SQL Sample Database SQL Syntax