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17 MySQL Tutorial for Beginners: Unions – Literals – Full Outer Ioins
A union combines the result sets of two or more SELECT statements into one single result set. To code a union you use the UNION keyword to connect two or … Original source
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SQL Joins Tutorial for Beginners – Inner Join, Left Join, Right Join, Full Outer Join
Learn how to create SQL Joins. The first 10 minutes teach you the basics. Inner Join, Left Outer Join, Right Outer Join, and Full Outer Join. The second 10 … Original source