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relational/test/select_join_opt.query

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Change relational language to use math symbols The symbols previously used were a Canadian script, and were looking good enough, but they might not be installed in every machine. Besides, all this is to workaround a Qt5 bug that prevents from rendering those symbols at times.
2015-05-31 12:01:03 +07:00
σ skill=='C' and chief==0 ((σ age<30 (people) ∪ σ age>40(people)) ⋈ skills)