Master SQL: A Comprehensive Beginners and Interactive Guide to Learn SQL from Scratch by Campbell Ryan

Author:Campbell, Ryan
Language: eng
Format: epub
Published: 2023-08-14T00:00:00+00:00

Left Joins: These retain all rows from the left table and matching rows from the right table, filling non-matches with null values.

Example: Joining a product catalog with customer reviews to show all products and associated reviews.

Right Joins: The reverse of left joins – they preserve all rows from the right table.

Example: Combining supplier information with products, retaining all suppliers' data.

Full Outer Joins: These retain all rows from both tables, filling null values for non-matching rows.

Example: Merging employee and project data to analyze involvement across all employees and projects.

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