{"id":154106,"date":"2023-08-02T14:16:26","date_gmt":"2023-08-02T08:46:26","guid":{"rendered":"https:\/\/www.gkseries.com\/blog\/?p=154106"},"modified":"2023-08-02T14:17:04","modified_gmt":"2023-08-02T08:47:04","slug":"let-the-set-of-functional-dependencies-f-qr-%e2%86%92-s-r-%e2%86%92-p-s-%e2%86%92-q-hold-on-a-relation-schema-x-pqrs-x-is-not-in-bcnf-suppose-x-is-decomposed-into-two-schemas-y-and-z","status":"publish","type":"post","link":"https:\/\/www.gkseries.com\/blog\/let-the-set-of-functional-dependencies-f-qr-%e2%86%92-s-r-%e2%86%92-p-s-%e2%86%92-q-hold-on-a-relation-schema-x-pqrs-x-is-not-in-bcnf-suppose-x-is-decomposed-into-two-schemas-y-and-z\/","title":{"rendered":"Let the set of functional dependencies F = {QR \u2192 S, R \u2192 P, S \u2192 Q} hold on a relation schema X = (PQRS). X is not in BCNF. Suppose X is decomposed into two schemas Y and Z"},"content":{"rendered":"\n

Q. Let the set of functional dependencies F = {QR \u2192 S, R \u2192 P, S \u2192 Q} hold on a relation schema X = (PQRS). X is not in BCNF. Suppose X is decomposed into two schemas Y and Z, where Y = (PR) and Z = (QRS).<\/p>\n\n\n\n

Consider the two statements given below.<\/p>\n\n\n\n

    \n
  1. Both Y and Z are in BCNF<\/li>\n\n\n\n
  2. Decomposition of X into Y and Z is dependency preserving and lossless<\/li>\n<\/ol>\n\n\n\n

    Which of the above statements is\/are correct?<\/p>\n\n\n\n

    (A) Both I and II<\/p>\n\n\n\n

    (B) I only<\/p>\n\n\n\n

    (C) II only<\/p>\n\n\n\n

    (D) Neither I nor II<\/p>\n\n\n\n

    Ans: II only<\/p>\n\n\n\n

    <\/p>\n","protected":false},"excerpt":{"rendered":"

    Q. Let the set of functional dependencies F = {QR \u2192 S, R \u2192 P, S \u2192 Q} hold on a relation schema X = (PQRS). X is not in BCNF. Suppose X is decomposed into two schemas Y and Z, where Y = (PR) and Z = (QRS). Consider the two statements given below. […]<\/p>\n","protected":false},"author":419,"featured_media":154110,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[5141],"tags":[5140],"class_list":["post-154106","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-gate","tag-gate-questions"],"_links":{"self":[{"href":"https:\/\/www.gkseries.com\/blog\/wp-json\/wp\/v2\/posts\/154106","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.gkseries.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.gkseries.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.gkseries.com\/blog\/wp-json\/wp\/v2\/users\/419"}],"replies":[{"embeddable":true,"href":"https:\/\/www.gkseries.com\/blog\/wp-json\/wp\/v2\/comments?post=154106"}],"version-history":[{"count":1,"href":"https:\/\/www.gkseries.com\/blog\/wp-json\/wp\/v2\/posts\/154106\/revisions"}],"predecessor-version":[{"id":154109,"href":"https:\/\/www.gkseries.com\/blog\/wp-json\/wp\/v2\/posts\/154106\/revisions\/154109"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.gkseries.com\/blog\/wp-json\/wp\/v2\/media\/154110"}],"wp:attachment":[{"href":"https:\/\/www.gkseries.com\/blog\/wp-json\/wp\/v2\/media?parent=154106"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.gkseries.com\/blog\/wp-json\/wp\/v2\/categories?post=154106"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.gkseries.com\/blog\/wp-json\/wp\/v2\/tags?post=154106"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}