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Gate 2004 doubt on foreign keys
Referencing to this gate ques- https://gateoverflow.in/16095/gate2004_13-let-and-two-relation-schema-where-the-primary-key Let R1 (A, B, C) and R2 (D, E) be two relation schema, where the primary keys are shown underlined, and let C be a ... subtracting entities of D from C can still have null and other values(those were duplicate). So, how will it get empty set?

bts1jimin asked in Databases Sep 1, 2018

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Can foreign key be renamed...if yes then what is the effect on relation?

Kamal Raj Praveen asked in Databases Jan 14, 2018

by Kamal Raj Praveen

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Recent questions tagged databases-