2 votes 2 votes Considering relational database, functional dependency between two attributes $A$ and $B$ is denoted by $A\to B$ $B\gets A$ $AB\to R$ $R\gets AB$ Databases nielit2016dec-scientistb-cs databases database-normalization + – admin asked Mar 31, 2020 retagged Oct 22, 2020 by Krithiga2101 admin 2.4k views answer comment Share Follow See all 0 reply Please log in or register to add a comment.
1 votes 1 votes Option A. A -> B Functional Dependency is one attribute determines another attribute in a DBMS system. Here A determines B i.e., with A attribute we can derive attribute B. Saitheja Muthoju answered Apr 26, 2020 Saitheja Muthoju comment Share Follow See all 5 Comments See all 5 5 Comments reply Show 2 previous comments ramcharantej_24 commented Apr 27, 2020 i edited by ramcharantej_24 Apr 27, 2020 reply Follow Share yea,but is B <-- A not same as A-->B ? if so why? Both mean A is functionally depending on B. 0 votes 0 votes Saitheja Muthoju commented Apr 27, 2020 reply Follow Share B <-- A is not same as A-->B . Because of this <-- symbol. If it is this -->, it will be one of the correct option. 0 votes 0 votes ramcharantej_24 commented Apr 27, 2020 reply Follow Share so whats difference between --> and <-- 0 votes 0 votes Please log in or register to add a comment.
1 votes 1 votes ANS : A Relational database, functional dependency between two attributes AA and BB is denoted by A→B WHERE A IS CALLED AS DETERMINANT .A DETERMINE B anjli answered Feb 6, 2021 anjli comment Share Follow See all 0 reply Please log in or register to add a comment.