8 votes 8 votes Which operation is used to extract specified columns from a table? Project Join Extract Substitute Databases isro2007 databases relational-algebra + – go_editor asked Jun 10, 2016 go_editor 4.4k views answer comment Share Follow See all 0 reply Please log in or register to add a comment.
Best answer 18 votes 18 votes To extract a specified row in a table we do select operation To extract a specified column from a table we do project operation Answer A) srestha answered Jun 10, 2016 selected Jun 27, 2016 by Arjun srestha comment Share Follow See all 0 reply Please log in or register to add a comment.
2 votes 2 votes Answer is Project To choose a subset of columns in a relation Project operation is used It is denoted as Π. Neeraj7375 answered Jan 16, 2017 Neeraj7375 comment Share Follow See all 0 reply Please log in or register to add a comment.
1 votes 1 votes project Sanjoy Saha answered Jun 19, 2016 Sanjoy Saha comment Share Follow See all 0 reply Please log in or register to add a comment.
1 votes 1 votes project is use to extract specified columns from a table it also eliminate dublicate . Shailendra_ answered Nov 10, 2019 Shailendra_ comment Share Follow See all 0 reply Please log in or register to add a comment.