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What is the SQL FROM Keyword?

SQL FROM Keyword Example

  • The FROM keyword is used in SQL to specify the table from which data should be selected or deleted.
  • It is an essential component of SQL statements, particularly SELECT, DELETE, UPDATE and some other DML (Data Manipulation Language) operations.

Basic Syntax:

The basic syntax of the FROM keyword in a SELECT the statement is as follows:

SELECT column1, column2, ...
FROM table_name;

Explanation:

  • column1, column2, ... are the columns you want to retrieve.
  • table_name is the name of the table from which to retrieve the data.

SQL FROM keyword

The SQL FROM keyword is a crucial component of SQL queries, used to specify the table from which data should be selected or manipulated. It plays a vital role in SELECT, DELETE, UPDATE and other DML operations, allowing users to interact with databases effectively. Understanding the FROM keyword is good for anyone working with SQL databases as it is the foundation for querying and modifying data.

In this article, We will learn about What is the SQL FROM Keyword along with various SQL FROM Keyword Examples and so on.

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What is the SQL FROM Keyword?

The FROM keyword is used in SQL to specify the table from which data should be selected or deleted. It is an essential component of SQL statements, particularly SELECT, DELETE, UPDATE and some other DML (Data Manipulation Language) operations....

SQL FROM Keyword Example

Lets understand SQL From with examples. Let’s say we have a some tables called students, courses and enrollments as shown below:...

Important Point About SQL From Keyword

When working with multiple tables, using aliases makes your SQL statements easier to read and maintain. Instead of using SELECT *, specify the columns you need. This can improve performance and readability. Use the appropriate type of join based on your requirement to ensure you get the correct results. Use the WHERE clause to filter data as early as possible to reduce the amount of data processed by subsequent operations....

Conclusion

In conclusion, the SQL FROM keyword is a fundamental aspect of SQL queries, enabling users to specify the source table for data operations. Whether selecting data from a single table, joining multiple tables, or using subqueries, the FROM keyword is essential for building powerful and efficient SQL statements....

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#Databases #SQL

SQL FROM Keyword Example