From SQL to Math Operators

Algebra and Simple SQL Statements. SQL: Select * From R Group by GA; Math: G[GA] R. Meaning: Group table R on the grouping columns GA= {GA1, GA2, …GAn} R1 x R2: the Cartesian product of table R1 and R2. SQL: SELECT * FROM R WHERE C; Math: ([C]R. Meaning: Select all rows of table R that satisfy condition C. Duplicate rows are not eliminated. ................
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