The database is becoming increasingly integrated, creating a clamor for standard language that can work in different computing environments. SQL has proved to be the standard language as it allows programmers or developers to learn one set of commands and use them to create, retrieve, alter, and or transfer data regardless of whether they are working on the PC, a workstation, a mini, or a mainframe. In this tutorial, you will learn about the introduction of the structured query language.
For handling database and database-related programming, programmers need to have some medium or interface to particularize a set of commands or codes to deal with a database or access the database's data. SQL(Structured Query Language) is a standard database programming language for accessing and manipulating data in a relational database.
What Will You Get Learning SQL?
SQL gives unique learning and database handling techniques on Structured Query language and will help you make better command over the SQL queries and to deal with these codes efficiently. Since SQL helps you to include database creation, database or table deletion, fetching row data and modifying those data, etc., in parallel, SQL makes things automatic and smooth for end-users to access and deal with that application's data efficiently.
What Is SQL?
SQL (Structured Query Language) is a computer-based structured, formatted database language designed for managing data in Relational Database Management Systems (RDBMS). SQL is a standardized computer language that was initially developed by IBM for querying, altering, and defining relational databases using declarative statements.
- IBM initially developed SQL in the 1970s.
- SQL is pronounced as "sequel".
- SQL is a computer language for storing, manipulating, and retrieving data in a relational database.
- SQL allows you to create, modify and query databases.
- SQL is a standard language that is used by most relational databases.
- SQL is used to access and manipulate data stored in tables.
- SQL is used to join multiple tables, create views, stored procedures, and triggers.
- SQL is used to create and manage the schema of the database.
- SQL can be used to control access to the data and manage the transaction.
- SQL is used to create reports and data visualizations.
- SQL is used for data validation and data integrity.
- SQL is used for data security and backup, and recovery.
- SQL is used for performance tuning and optimization.
- SQL is used for troubleshooting and monitoring the database performance.
What Can SQL Do?
SQL (Structured Query Language) can perform a wide range of operations on a relational database. Some of the main things that SQL can do include:
- SELECT: Retrieve specific data from one or more tables.
- INSERT: Add new data to a table.
- UPDATE: Modify existing data in a table.
- DELETE: Remove data from a table.
- CREATE: Create new tables, views, stored procedures, and other database objects.
- ALTER: Modify the structure of existing tables, views, and other database objects.
- DROP: Remove tables, views, and other database objects.
- INDEX: Create and manage indexes to improve the performance of queries.
- JOIN: Retrieve data from multiple tables based on a related column.
- UNION: Combine the results of various SELECT statements.
- GROUP BY: Group data by one or more columns and perform aggregate functions.
- HAVING: Filter data based on aggregate functions.
- WHERE: Filter data based on specific conditions.
- ORDER BY: Sort data in ascending or descending order.
- LIMIT: Retrieve a particular number of rows from the result set.
- TRUNCATE: Remove all data from a table, but keep the table structure.
These are just a few examples of the many operations that can be performed using SQL, and the specific set of commands and functionality may vary depending on the specific relational database management system (RDBMS) being used.