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To refresh everyone’s memory, we’ve started talking about SQL JOIN statements over the past few columns — one of the most fundamentally important areas of SQL development. In the last column, we talked about the various types of joins, and I promised to cover “outer joins” this time around to complement the discussions of inner and cross joins from the past two columns. So with no further ado…. The SQL outer joinEvery type of SQL join effectively multiplies the row in one table by 
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