What is the difference between a left join and a left outer join?

Today, We want to share with you left join vs left outer join.In this post we will show you sql subquery, hear for left outer join we will give you demo and example for implement.In this post, we will learn about MySQL LEFT Inner and outer where clause joins with an example.


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As I will cover this Post with live Working example to develop joins sql, so the sql left join multiple tables is used for this example is following below.

What is a LEFT JOIN in SQL?

A LEFT JOIN performs a join starting with the first (left-most) table.
Then, any matched rows from the second table (right-most) will be included.
LEFT JOIN and LEFT OUTER JOIN are the same.

The SQL LEFT JOIN syntax

The general LEFT JOIN syntax is

SELECT datacolumns
  FROM dbtable-nm1 LEFT JOIN dbtable-nm2 
    ON datacolumn1 = datacolumn2
 WHERE condition

The general LEFT OUTER JOIN syntax is

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SELECT datacolumns
  FROM dbtable-nm1 LEFT OUTER JOIN dbtable-nm2 
    ON datacolumn1 = datacolumn2
 WHERE condition


SQL Query Question: List all members and the total amount they spent irrespective whether they placed any Transactions or not.

SELECT TransactionNumber, FullTotalPrice, MemberName, ProfileName, Address, Country
  FROM Member C LEFT JOIN [Transaction] O
    ON O.MemberId = C.Id
 ORDER BY FullTotalPrice


Note:: The ORDER BY FullTotalPrice shows the members without Transactions first (i.e. TotalMount is NULL).

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