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Left outer Join or Left join

Products Table



Categories Table



Left outer Join or Left join:

 The LEFT JOIN keyword returns all rows from the left table (Products), with the matching rows in the right table (Categories). The result is NULL in the right side when there is no match.



Syntax:

SELECT
column_name(s)
FROM Table1 (Left Side Table)
LEFT JOIN Table2 (Right Side Table)
ON table1.column_name=table2.column_name
or:
SELECT column_name(s)
FROM Table1 (Left Side Table)
LEFT OUTER JOIN Table2 (Right Side Table)
ON Table1.column_name=Table2.column_name

Example:

SELECT
ProductName AS [Product Name]
,UnitPrice AS [Price]
,CategoryName AS [Product Category],ImagePath AS [Image]
 FROM Products P
LEFT OUTER JOIN Categories C ON P.CategoryID=C.CategoryID


Left outer query will return below result 



Invalid entry,please enter valid data.

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