Database Query Writer | SQL

SQL Joins Example

This SQL query demonstrates the use of INNER JOIN, LEFT JOIN, and RIGHT JOIN to combine data from three tables - table1, table2, and table3 based on the id column.


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This Query related with thread "Data Analysis & AI Tool Insights"

Prompt

-- Write a query that includes an inner join, a left join, and a right join between three tables.
SELECT *
FROM table1
INNER JOIN table2 ON table1.id = table2.id
LEFT JOIN table3 ON table2.id = table3.id
RIGHT JOIN table1 ON table3.id = table1.id;

Answer

-- The query includes an INNER JOIN, LEFT JOIN, and RIGHT JOIN between three tables: table1, table2, and table3.

SELECT *
FROM table1
-- Perform an INNER JOIN between table1 and table2 based on the id column
INNER JOIN table2 ON table1.id = table2.id
-- Perform a LEFT JOIN between the result of the inner join and table3 based on the id column
LEFT JOIN table3 ON table2.id = table3.id
-- Perform a RIGHT JOIN between the result of the previous joins and table1 based on the id column
RIGHT JOIN table1 ON table3.id = table1.id;

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Description

This SQL query demonstrates the use of INNER JOIN, LEFT JOIN, and RIGHT JOIN to combine data from three tables - table1, table2, and table3 based on the id column.

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