database - prime to prime transitivity in 3nf normal form -


i stuck in question. should answer this:

the relation scheme student performance (name, courseno, rolino, grade) has following functional dependencies:
name, courseno, -> grade
rolino, courseno -> grade
name -> rolino
rolino -> name

the highest normal form of relation scheme is

(a) 2 nf (b) 3 nf (c) bcnf (d) 4 nf

relation has 2 overlapping candidate-key dependencies in 3nf.


Comments

Post a Comment

Popular posts from this blog

java - How to specify maven bin in eclipse maven plugin? -

i have eclipse maven plugin coming on centos. how can execute maven command on linx like: mvn clean package [abigail@localhost ~]$ mvn bash: mvn: command not found how should specify path executable of maven plugin in eclipse? or have install maven seperately？ thanks. eclipse (m2e) have bundled central parts of maven inside eclipse plugin, why not detected, , not usable. investigation find correct way bootstrap it, have create launcher file manually. if want run maven outside of eclipse, far better off standalone version of maven. mvn command bootstrap maven runtime system correctly, , secondly, able use advice concerning use of maven. maven binaries quite stable, wouldn't need upgrade upgrade eclipse. you can subsequently switch eclipse use external installation if prefer.
Read more

Error while updating a record in APEX screen -

while updating record using mru failing below error. 1 error has occurred current version of data in database has changed since user initiated update process. current row version identifier = "c5f3645b026aa5646c00dc7b631c4d19" application row version identifier = "6a9323b62f641015fa4601421dfb03de" (row 1) this strange because not see change in data @ backend. any highly appreciated. thanks. aj
Read more

single sign on - Logging into Plone site with credentials passed through HTTP -

i using plone 4.3.3 , new plone development. here trying achieve: i have site going redirect plone site. in http url line redirects plone site pass username whereas plone site should automatically log user username in without asking credentials password. not care safety or encryption @ point. how achieve that? (i guess need somehow modify existing login view, how do that?) thanks. i had same problem , @ end i've developed own pas plugin. i've followed next steps: create pas plugin implement extractcredentials method following this example implement authenticatecredentials method following this example add plugin develop section in build.conf. start plone , open zope console. go acl_users folder , add plugin pas system there examples here can use templates.
Read more