25 Jun SQL Tutorial

SQL is a Standard Query language used to manage, access, and manipulate data in an RDBMS. It is used to insert, update, and delete records from a database. Also, set permissions on tables and views with SQL.

Microsoft SQL Server Tutorial (2026 Updated)

SQL Video Tutorial

SQL Interview Questions and Answers

Viewers

The SQL tutorial is prepared for students, engineers, and professionals. Beginning with the introduction and installation, you will learn how to create a database and tables, and how to insert records and select them. We have also included operators, clauses, and subquery lessons. With that, step-by-step text and video lessons are provided.

Run SQL Online

-- create
CREATE TABLE EMPLOYEE (
  empId int,
  name varchar(100),
  dept varchar(50)
);

-- insert
INSERT INTO EMPLOYEE(empId,name,dept) VALUES (0001, 'Clark', 'Sales');
INSERT INTO EMPLOYEE(empId,name,dept) VALUES (0002, 'Dave', 'Accounting');
INSERT INTO EMPLOYEE(empId,name,dept) VALUES (0003, 'Ava', 'Sales');

-- fetch 
SELECT * FROM EMPLOYEE;
GO

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FAQs

Q1: What is Microsoft SQL Server and what is it used for?

Ans: Microsoft SQL Server is an enterprise-grade Relational Database Management System (RDBMS) developed by Microsoft. Built on top of Structured Query Language (SQL) and T-SQL (Transact-SQL), it is widely used by organizations to store, manage, and retrieve relational data securely for web applications, enterprise software, data warehousing, and business intelligence (BI) systems.

Q2: What is T-SQL (Transact-SQL) and how does it extend standard SQL?

Ans: T-SQL (Transact-SQL) is Microsoft’s proprietary procedural extension for SQL Server. While standard SQL handles core data querying and manipulation, T-SQL extends it by adding programming features such as local variables, conditional processing (IF…ELSE), loops (WHILE), exception handling (TRY…CATCH), stored procedures, and custom user-defined functions.

Q3: What is SQL Server Management Studio (SSMS)?

Ans: SQL Server Management Studio (SSMS) is an integrated graphical user interface (GUI) desktop application used to configure, manage, administer, and develop all components of Microsoft SQL Server. It allows developers and database administrators (DBAs) to write T-SQL queries, design database tables visually, monitor server performance, and configure security roles.

Q4: What is the difference between Clustered and Non-Clustered Indexes in SQL Server?

Ans: Indexes speed up data retrieval in SQL Server tables:

• Clustered Index: Physically dictates and sorts the order in which data rows are stored on disk. A table can have only one Clustered Index (typically created automatically on the Primary Key).
• Non-Clustered Index: Stores a separate structure containing indexed keys and pointers (RIDs or clustering keys) back to the actual physical data rows. A table can have multiple Non-Clustered Indexes.

Q5: What core database management and T-SQL concepts are covered in Studyopedia’s SQL Server tutorial?

Ans: Studyopedia’s SQL Server tutorial covers SQL Server and SSMS installation, database creation, data types, DDL (CREATE, ALTER, DROP) and DML (SELECT, INSERT, UPDATE, DELETE) operations, filtering with WHERE and LIKE, SQL Joins (INNER, LEFT, RIGHT, FULL OUTER), Stored Procedures, Triggers, Views, Transactions (COMMIT/ROLLBACK), Indexing, and backing up/restoring database .bak files.

SQL Index

The following lessons are covered in the SQL Tutorial,

• SQL Introduction
• SQL vs NoSQL

 SQL – Install & Setup

• Install SQL on Windows
• [Solved] A required file could not be downloaded error while….

SQL – Create & Insert

• Create a Database
• Create a Table
• Insert Records

 SQL – Select Records

• SELECT statement
• SELECT DISTINCT statement
• WHERE Clause

 SQL – Order Records

• ORDER BY Clause

 SQL – Operators

• AND Operator
• OR Operator
• NOT Operator
• IN Operator
• BETWEEN Operator
• LIKE Operator

 SQL – Built-in Functions

• SQL MAX() Function
• SQL MIN() Function
• SQL SUM() Function
• SQL AVG() Function
• SQL COUNT() Function

 SQL – Constraints

• SQL Primary Key Constraint
• SQL Foreign Key Constraint
• SQL Unique Constraint
• SQL Check Constraint
• SQL NOT NULL Constraint

 SQL – Alter & Update

• SQL ALTER TABLE Statement
• SQL UPDATE Statement
• SQL Aliases

 SQL – Advanced

• SQL Stored Procedures
• SQL Indexes
• SQL SELECT INTO Statement
• SQL SELECT TOP Clause
• Backup a Database
• SQL Views
• Drop a Table

 SQL – Resources

• SQL Examples
• SQL Interview QA