Outer Join: An Overview 🚀
An Outer Join is a powerful SQL operation used to merge data from two tables, ensuring no data is left behind, even if there’s no match in one of the tables. It accommodates unmatched rows by filling the missing values with NULL. Depending on the direction of inclusion, it can be classified into three types:
🛫 Left Outer Join
Includes all rows from the left table.
Matches rows from the right table, where available.
Unmatched rows in the right table are filled with NULL.
🛬 Right Outer Join
Includes all rows from the right table.
Matches rows from the left table, where available.
Unmatched rows in the left table are filled with NULL.
🚀 Full Outer Join
Combines all rows from both tables.
Rows with no match in either table are filled with NULL.
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