T-SQL Tutorial

Introduction to SQL

SQL (Structured Query Language) is a programming language used to manage and manipulate relational databases, such as SQL Server. It is used to insert, update, and retrieve data from a database.

Some common SQL commands include SELECT, which is used to retrieve data from a database, and INSERT, which is used to add new data to a database. Other important SQL commands include UPDATE, DELETE, and WHERE, which are used to modify and filter data within a database.

SQL Server is a relational database management system (RDBMS) developed by Microsoft. It is a popular choice for large-scale enterprise systems, as it is known for its stability and performance.

Advantages of using SQL

Some of the advantages of using SQL include:

Ease of use: SQL is a relatively simple language that is easy to learn and understand, making it accessible to a wide range of users.

Flexibility: SQL can be used to perform a wide variety of tasks, including data retrieval, insertion, updates, and deletion.

High-performance: SQL is designed to work with large amounts of data quickly and efficiently, making it a good choice for high-performance applications.

Data integrity: SQL provides a number of built-in mechanisms for maintaining data integrity, such as constraints and transactions, which can help ensure that your data is accurate and consistent.

Portability: SQL is a widely-used standard language, which means that it can be used with a variety of platforms and databases.

Interoperability: SQL can be used to easily query and join data from multiple tables, regardless of the underlying data source, making it a great choice for data integration.

Support: SQL is supported by a wide range of database management systems and has a large and active user community, which makes it easy to find help and resources when needed.

SQL Server Query

SQL BasicSQL AdvancedSQL AdvancedSQL Functions
SQL Select
SQL Distinct
SQL Where
SQL And - OR
SQL Order By
SQL Group By
SQL Having
SQL Like
SQL Insert
SQL Update
SQL Delete
SQL Join
SQL Inner Join
SQL Left Join
SQL Right Join
SQL Full Join
SQL Union
SQL TOP
SQL Wildcard
SQL IN
SQL Between
SQL ISNULL
SQL Create Database
SQL Create Table
SQL Create Index
SQL Create View
SQL Increment
SQL Drop
SQL Alter Table
SQL Add Column
SQL Alter Column
SQL Rename Column
SQL Drop Column
SQL Avg
SQL Count
SQL Max
SQL Min
SQL Sum
SQL Mid
SQL Len
SQL Round
SQL Now
SQL UCase
SQL LCase