{"id":15736,"date":"2024-04-15T04:51:27","date_gmt":"2024-04-15T04:51:27","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=15736"},"modified":"2024-04-15T04:51:27","modified_gmt":"2024-04-15T04:51:27","slug":"what-is-the-use-of-referential-integrity-in-ms-access-a-it-allow-to-enter-a-value-in-the-foreign-key-field-of-a-child-table-if-that-value-exist-in-the-primary-key-of-the-parent-table-b-it-does-not","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/what-is-the-use-of-referential-integrity-in-ms-access-a-it-allow-to-enter-a-value-in-the-foreign-key-field-of-a-child-table-if-that-value-exist-in-the-primary-key-of-the-parent-table-b-it-does-not\/","title":{"rendered":"What is the use of Referential Integrity in MS Access? A. It allow to enter a value in the foreign key field of a child table if that value exist in the primary key of the parent table B. It does not allow to enter a value in the foreign key field of a child table if that value exist in the primary key of the parent table C. It allow to enter a value in the Primary key field of a child table if that value exist in the Foreign key of the parent table D. None of above"},"content":{"rendered":"<p>\r\n    <!-- Check if it's an AMP page -->\r\n            <!-- Non-AMP version -->\r\n        <div class=\"mcq-container\" data-quiz-id=\"quizState_6a990d888e205\">\r\n                                            <div class=\"option\" data-option-key=\"option1\" data-is-correct=\"false\">\r\n                    It allow to enter a value in the foreign key field of a child table if that value exist in the primary key of the parent table                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option2\" data-is-correct=\"true\">\r\n                    It does not allow to enter a value in the foreign key field of a child table if that value exist in the primary key of the parent table                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option3\" data-is-correct=\"false\">\r\n                    It allow to enter a value in the Primary key field of a child table if that value exist in the Foreign key of the parent table                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option4\" data-is-correct=\"false\">\r\n                    None of above                <\/div>\r\n                            \r\n            <!-- Feedback messages for non-AMP -->\r\n            <div class=\"feedback\" data-feedback=\"wrong\">Answer is Right!<\/div>\r\n            <div class=\"feedback\" data-feedback=\"right\">Answer is Wrong!<\/div>\r\n        <\/div>\r\n\r\n        <script>\r\n        document.addEventListener('DOMContentLoaded', function () {\r\n            var containers = document.querySelectorAll('.mcq-container');\r\n\r\n            containers.forEach(function(container) {\r\n                var options = container.querySelectorAll('.option');\r\n                var feedbackSelect = container.querySelector('[data-feedback=\"select\"]');\r\n                var feedbackWrong = container.querySelector('[data-feedback=\"wrong\"]');\r\n                var feedbackRight = container.querySelector('[data-feedback=\"right\"]');\r\n\r\n                options.forEach(function(option) {\r\n                    option.addEventListener('click', function() {\r\n                        var selectedOption = option.getAttribute('data-option-key');\r\n                        var isCorrect = option.getAttribute('data-is-correct') === 'true';\r\n\r\n                        \/\/ Remove previous selections\r\n                        options.forEach(function(opt) {\r\n                            opt.classList.remove('correct', 'incorrect');\r\n                        });\r\n\r\n                        \/\/ Add the correct\/incorrect class\r\n                        if (isCorrect) {\r\n                            option.classList.add('correct');\r\n                            feedbackRight.hidden = false;\r\n                            feedbackWrong.hidden = true;\r\n                        } else {\r\n                            option.classList.add('incorrect');\r\n                            feedbackRight.hidden = true;\r\n                            feedbackWrong.hidden = false;\r\n                        }\r\n\r\n                        \/\/ Hide select feedback\r\n                        feedbackSelect.hidden = true;\r\n                    });\r\n                });\r\n            });\r\n        });\r\n        <\/script>\r\n    \r\n    <!--more--><\/p>\n<p>The correct answer is: <strong>B. It does not allow to enter a value in the foreign key field of a child table if that value exist in the primary key of the parent table.<\/strong><\/p>\n<p>Referential integrity is a set of rules that ensures that data in one table is consistent with data in another table. In MS Access, referential integrity is enforced by the primary key and foreign key constraints.<\/p>\n<p>The primary key is a column or set of columns that uniquely identifies each row in a table. The foreign key is a column or set of columns in a table that refers to the primary key of another table.<\/p>\n<p>When you create a foreign key constraint, you are essentially saying that the values in the foreign key column must exist in the primary key column of the parent table. This ensures that the data in the two tables is consistent.<\/p>\n<p>For example, let&#8217;s say you have a table called <code>Customers<\/code> and a table called <code>Orders<\/code>. The <code>Customers<\/code> table has a primary key called <code>CustomerID<\/code>. The <code>Orders<\/code> table has a foreign key called <code>CustomerID<\/code> that refers to the <code>CustomerID<\/code> column in the <code>Customers<\/code> table.<\/p>\n<p>If you try to add a new row to the <code>Orders<\/code> table with a <code>CustomerID<\/code> that does not exist in the <code>Customers<\/code> table, Access will prevent you from doing so. This is because the foreign key constraint is <div class=\"telegram-channel-container\">\r\n        <a href=\"https:\/\/t.me\/pscnotes2025\" target=\"_blank\" class=\"telegram-channel-button\">\r\n            <span class=\"telegram-icon\">\r\n                <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 496 512\">\r\n                    <path fill=\"white\" d=\"M248,8C111,8,0,119,0,256s111,248,248,248s248-111,248-248S385,8,248,8z M362,177L320,367c-3,14-10,18-20,14l-56-41l-27,26 c-3,3-5,5-10,5l4-63L323,196c5-5-1-7-8-3l-98,62l-42-13c-9-3-10-9,2-14l162-63C351,160,365,164,362,177z\"\/>\r\n                <\/svg>\r\n            <\/span>\r\n            Join Our Telegram Channel\r\n        <\/a>\r\n    <\/div> preventing you from entering a value in the foreign <div class=\"youtube-subscribe-container\">\r\n        <a href=\"https:\/\/www.youtube.com\/channel\/UCNHT8lW-JmLC68rjBfZhdkg?sub_confirmation=1\" target=\"_blank\" class=\"youtube-subscribe-button\">\r\n            <span class=\"youtube-icon\">\r\n                <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 576 512\">\r\n                    <path d=\"M549.7 124.1c-6.3-23.7-24.8-42.3-48.3-48.6C458.8 64 288 64 288 64S117.2 64 74.6 75.5c-23.5 6.3-42 24.9-48.3 48.6-11.4 42.9-11.4 132.3-11.4 132.3s0 89.4 11.4 132.3c6.3 23.7 24.8 41.5 48.3 47.8C117.2 448 288 448 288 448s170.8 0 213.4-11.5c23.5-6.3 42-24.2 48.3-47.8 11.4-42.9 11.4-132.3 11.4-132.3s0-89.4-11.4-132.3zm-317.5 213.5V175.2l142.7 81.2-142.7 81.2z\"\/>\r\n                <\/svg>\r\n            <\/span>\r\n            Subscribe on YouTube\r\n        <\/a>\r\n    <\/div> key field that does not exist in the primary key of the parent table.<\/p>\n<p>Referential integrity is important because it helps to ensure the accuracy and consistency of data in your database. By enforcing referential integrity, you can be confident that the data in your database is accurate and up-to-date.<\/p>\n<p>Options A and C are incorrect because they allow you to enter a value in the foreign key field of a child table if that value does not exist in the primary key of the parent table. This would violate referential integrity and could result in inaccurate data in your database.<\/p>\n<p>Option D is incorrect because it is not a valid option.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Subscribe on YouTube<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[672],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.2 (Yoast SEO v23.3) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>What is the use of Referential Integrity in MS Access? A. It allow to enter a value in the foreign key field of a child table if that value exist in the primary key of the parent table B. It does not allow to enter a value in the foreign key field of a child table if that value exist in the primary key of the parent table C. It allow to enter a value in the Primary key field of a child table if that value exist in the Foreign key of the parent table D. 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It allow to enter a value in the Primary key field of a child table if that value exist in the Foreign key of the parent table D. 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A. It allow to enter a value in the foreign key field of a child table if that value exist in the primary key of the parent table B. It does not allow to enter a value in the foreign key field of a child table if that value exist in the primary key of the parent table C. It allow to enter a value in the Primary key field of a child table if that value exist in the Foreign key of the parent table D. None of above","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/exam.pscnotes.com\/mcq\/what-is-the-use-of-referential-integrity-in-ms-access-a-it-allow-to-enter-a-value-in-the-foreign-key-field-of-a-child-table-if-that-value-exist-in-the-primary-key-of-the-parent-table-b-it-does-not\/","og_locale":"en_US","og_type":"article","og_title":"What is the use of Referential Integrity in MS Access? A. It allow to enter a value in the foreign key field of a child table if that value exist in the primary key of the parent table B. It does not allow to enter a value in the foreign key field of a child table if that value exist in the primary key of the parent table C. It allow to enter a value in the Primary key field of a child table if that value exist in the Foreign key of the parent table D. 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A. It allow to enter a value in the foreign key field of a child table if that value exist in the primary key of the parent table B. It does not allow to enter a value in the foreign key field of a child table if that value exist in the primary key of the parent table C. It allow to enter a value in the Primary key field of a child table if that value exist in the Foreign key of the parent table D. 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A. It allow to enter a value in the foreign key field of a child table if that value exist in the primary key of the parent table B. It does not allow to enter a value in the foreign key field of a child table if that value exist in the primary key of the parent table C. It allow to enter a value in the Primary key field of a child table if that value exist in the Foreign key of the parent table D. None of above"}]},{"@type":"WebSite","@id":"https:\/\/exam.pscnotes.com\/mcq\/#website","url":"https:\/\/exam.pscnotes.com\/mcq\/","name":"MCQ and Quiz for Exams","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/exam.pscnotes.com\/mcq\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209","name":"rawan239","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/d97f17072bfa490596c8f78363955d55?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/d97f17072bfa490596c8f78363955d55?s=96&d=mm&r=g","caption":"rawan239"},"sameAs":["https:\/\/exam.pscnotes.com"],"url":"https:\/\/exam.pscnotes.com\/mcq\/author\/rawan239\/"}]}},"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/15736"}],"collection":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/comments?post=15736"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/15736\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=15736"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=15736"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=15736"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}