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List the average salaries for employees in Seattle and London. The averages need to be calculated on a per city basis. Use a union operation
List the average salaries for employees in Seattle and London. The averages need to be calculated on a per city basis. Use a union operation to generate the results. Hint: Use one SQL statement to calculate the average salary for one city and another almost identical SQL statement to calculate the average salary for the other city.
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Constraint Databases And Applications Second International Workshop On Constraint Database Systems Cdb 97 Delphi Greece January 1997 Cp 96 Workshop On Constraints And Databases Cambridge Ma Usa August 1996 Selected Papers Lncs 1191
Authors: Volker Gaede ,Alexander Brodsky ,Oliver Gunther ,Divesh Srivastava
1st Edition
3540625011, 978-3540625018
