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SQL Introduction

Structured Query Language (SQL) is a standard programming language specifically designed for managing and manipulating relational databases. SQL is used to insert, search, update, and delete database records, making it an essential tool for database administrators and developers.

Key Topics

1. What is SQL?

SQL is a standardized language used to communicate with relational database management systems (RDBMS). It allows users to create, read, update, and delete (CRUD) data within a database.

2. History of SQL

SQL was initially developed at IBM in the 1970s and later standardized by ANSI in 1986 and ISO in 1987. Over the years, SQL has become the de facto standard for database query languages.

3. Why Use SQL?

  • Efficiently manage large amounts of data.
  • Standardized language across various RDBMS.
  • Facilitates data manipulation and retrieval.

4. SQL in MSSQL Server

MSSQL Server uses Transact-SQL (T-SQL), an extension of SQL with additional features. T-SQL includes procedural programming, local variables, and support for functions and stored procedures.

Best Practices

  • Learn standard SQL before diving into vendor-specific extensions.
  • Regularly update your knowledge with the latest SQL standards.
  • Practice writing queries to become proficient.

Key Takeaways

  • SQL is essential for interacting with relational databases.
  • Understanding SQL is crucial for database management.
  • MSSQL Server uses T-SQL, an extension of standard SQL.
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