SQL left outer join Examples

Today, We want to share with you left outer join.In this post we will show you sql subquery, hear for left outer join vs right 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.

SQL LEFT JOIN

There are the Following The simple About joins sql Full Information With Example and source code.

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

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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

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

SQL LEFT JOIN Example

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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