A critique of the SQL database language

Extending the database relational model to capture more meaning

1979 • 1,567 citations

System R

1976 • 1,052 citations

Extending the data base relational model to capture more meaning

1979 • 525 citations

A guide to DB2

1984 • 69 citations

Granularity of Locks in a Large Shared Data Base.

1975 • 47 citations

The Outer Join.

1983 • 46 citations

Null Values in Database Management.

1982 • 41 citations

Some principles of good language design

1984 • 33 citations

An introduction to the unified database language (UDL)

1980 • 24 citations