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DBMS-Join

14 posts

Joining Three or More Tables in SQL

Last Updated: 29 January 2025

SQL joins are an essential part of relational database management, allowing users to combine data from multiple tables efficiently. When the required data is spread across...read more

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Technical Scripter

Difference between JOIN and UNION in SQL

Last Updated: 12 July 2025

Pre-requisites: JOIN, UNIONJOIN in SQL is used to combine data from many tables based on a matched condition between them. The data combined using the JOIN statement resul...read more

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Difference Between

Difference between Left, Right and Full Outer Join

Last Updated: 12 July 2025

When working with SQL and relational databases, joins are essential tools that allow you to combine data from multiple tables based on related columns. Among the various t...read more

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SQL Join vs Subquery

Last Updated: 12 July 2025

The difference between SQL JOIN and subquery is that JOIN combines records of two or more tables whereas Subquery is a query nested in another query.SQL JOIN and Subquery ...read more

Difference between Inner Join and Outer Join in SQL

Last Updated: 12 July 2025

JOINS in SQL are fundamental operations used to combine data from multiple tables based on related columns. They are essential for querying data that is distributed across...read more

Difference between Natural join and Cross join in SQL

Last Updated: 12 April 2025

A JOIN clause is used to combine rows from two or more tables, based on a related data column in between them. Natural Join and Cross Join both serve different purposes in...read more

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Difference Between

Difference between Natural join and Inner Join in SQL

Last Updated: 12 July 2025

The join operation merges the two tables based on the same attribute name and their datatypes are known as Natural join Unlike INNER JOIN, which requires you to specify th...read more

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Joining Tables using MultiMaps

Last Updated: 23 February 2023

Joining two different tables on their matching columns can be done using nested loops, but a more efficient and scalable way is to use multimaps. The idea is to map from e...read more

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Data Structures-Hash

Recursive Join in SQL

Last Updated: 19 December 2024

In SQL, a recursive join is a powerful technique used to handle hierarchical data relationships, such as managing employee-manager relationships, family trees, or any data...read more

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Double-Pipelined Join

Last Updated: 19 January 2023

Double-pipelined join is a type of distributed query processing technique used to join two large datasets stored in a distributed environment. The two datasets are joined ...read more

Technical Scripter

Technical Scripter 2022

SQL Joins (Inner, Left, Right and Full Join)

Last Updated: 27 June 2025

SQL joins are fundamental tools for combining data from multiple tables in relational databases. Joins allow efficient data retrieval, which is essential for generating me...read more

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SQL-Clauses-Operators

SQL | Join (Cartesian Join & Self Join)

Last Updated: 06 January 2025

In SQL, CARTESIAN JOIN (also known as CROSS JOIN) and SELF JOIN are two distinct types of joins that help combine rows from one or more tables based on certain conditions....read more

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SQL-Clauses-Operators

Last Updated: 19 December 2024

In SQL, the CROSS JOIN is a unique join operation that returns the Cartesian product of two or more tables. This means it matches each row from the left table with every r...read more

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Last Updated: 23 May 2025

In SQL, the FULL JOIN (or FULL OUTER JOIN) is a powerful technique used to combine records from two or more tables. Unlike an INNER JOIN, which only returns rows where the...read more

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