SQL(Structured Query Language) Tutorials TpointTech

SQL (Structured Query Language) is used to perform operations on the records stored in the database, such as updating records, inserting records, deleting records, creating and modifying database tables, views, etc.

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1. SQL Tutorial Learn SQL basics and advanced concepts. TpointTech www.tpointtech.com

2. What is SQL? 1 Definition SQL (Structured Query Language) maintaining the data in relational database management systems. 2 Purpose SQL basically used to update, insert, delete records, and modify database objects. 3 Importance Essential for data professionals and used by major companies.

3. Why SQL? Data Manipulation Insert, update, and delete data. Retrieval and Description Retrieve and describe structured data. Database Management Create, drop, and manipulate databases and tables.

4. History of SQL 1 1970 E.F. Codd publishes "A Relational Model of Data". 2 1970s Boyce and Chamberlin develop SEQUEL at IBM. 3 Late 1970s Relational Software Inc. develops the first SQL based on RDBMS. 4 1979 Oracle V2, the first SQL implementation, is released.

5. SQL Commands CREATE Create databases, tables, views, etc. UPDATE Modify existing data. DELETE Remove or erase saved records from database. SELECT Retrieve data from tables. DROP Delete table, view, database, etc. INSERT Easily insert single or multiple records into database tables.

6. SQL vs NoSQL Feature SQL NoSQL Type Relational Non-relational/Distributed Schema Predefined, Fixed Dynamic, Unstructured Scalability Vertical Horizontal Data Model Structured Unstructured/Semi-structured Language SQL JSON, XML, YAML, or binary schema

7. Advantages of SQL 1 Easy to Use Minimal coding required, user-friendly. 2 Fast Processing Quick and efficient data access and manipulation. 3 Standardized Follows ISO and ANSI standards for uniformity. 4 Portability Used in desktop computers, laptops, tablets, and even smartphones. 5 Interactive language Receive the answers to complex queries in seconds. 6 More than one Data View Enables custom database views for different users.

8. Disadvantages of SQL 1 Costly Some versions have high operational costs. 2 Complex Interface The interface of Structured query language is difficult. 3 Limited Control Partial database control due to hidden business rules.

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