Klug, Anthony Equivalence of relational algebra and relational calculus query languages having aggregate functions. (English) Zbl 0485.68089 J. Assoc. Comput. Mach. 29, 699-717 (1982). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 14 Documents MSC: 68P20 Information storage and retrieval of data 68P05 Data structures Keywords:relational query languages; expressive power; relational calculus; database management systems; relational data model Software:INGRES PDFBibTeX XMLCite \textit{A. Klug}, J. Assoc. Comput. Mach. 29, 699--717 (1982; Zbl 0485.68089) Full Text: DOI Link