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What is left join table SQL?

April 26, 2017Computers design internet join Left Programming sql Table

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What is left join table SQL?

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10 Posted

A left join sql statement returns all the statements from the left table for every matching row in the right table and then those rows with no matching entries on the right table. sounds gibberish, follow this example, The “Persons” table: P_Id LastName FirstName Address City 1 Hansen Ola Timoteivn 10 Sandnes 2 Svendson Tove Borgvn 23 Sandnes 3 Pettersen Kari Storgt 20 Stavanger The “Orders” table: O_Id OrderNo P_Id 1 77895 3 2 44678 3 3 22456 1 4 24562 1 5 34764 15 We use the following SELECT statement: SELECT Persons.LastName, Persons.FirstName, Orders.OrderNo FROM Persons LEFT JOIN Orders ON Persons.P_Id=Orders.P_Id ORDER BY Persons.