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The execution time of an SQL query can be reduced significantly by considering different schedules for the operations specified in the query. The benefits of considering different schedules, a hallmark of strength in query optimization, are not usually exploited if a query contains projections along with binary operations. This paper presents a set of "no regression" algorithms that are capable of generating different schedules for the queries containing projections and binary operations.

No regression algorithm for the enumeration of projections in SQL queries with joins and outer joins