Question
Can you give two cases when a subquery is needed and cannot be substituted with a join? For example, the case where one needs to
Can you give two cases when a subquery is needed and cannot be substituted with a join?
For example, the case where one needs to find all customers who have never purchased a product (using a subquery with the NOT IN qualifier).
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Current Trends In Database Technology Edbt 2006 Edbt 2006 Workshops Phd Datax Iidb Iiha Icsnw Qlqp Pim Parma And Reactivity On The Web Munich Germany March 2006 Revised Selected Papers Lncs 4254
Authors: Torsten Grust ,Hagen Hopfner ,Arantza Illarramendi ,Stefan Jablonski ,Marco Mesiti ,Sascha Muller ,Paula-Lavinia Patranjan ,Kai-Uwe Sattler ,Myra Spiliopoulou ,Jef Wijsen
2006th Edition
3540467882, 978-3540467885
