{"id":218429,"date":"2025-05-23T18:48:30","date_gmt":"2025-05-23T18:48:30","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=218429"},"modified":"2025-05-23T18:48:32","modified_gmt":"2025-05-23T18:48:32","slug":"create-a-parameter-query-to-select-the-tblmember-table-records-for-a-city-field-value-that-the-user-specifies","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/05\/23\/create-a-parameter-query-to-select-the-tblmember-table-records-for-a-city-field-value-that-the-user-specifies\/","title":{"rendered":"Create a parameter query to select the tblMember table records for a City field value that the user specifies"},"content":{"rendered":"\n<p><strong>Create a parameter query to select the tblMember table records for a City field value that the user specifies<\/strong>. Select all records from the table if the user doesn&#8217;t enter a City field value. Display all fields from the tblMember table in the query record set. Save the query as qryMemberCityParameter.<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-0-color\">The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n<p>Certainly! Here&#8217;s the <strong>correct parameter query<\/strong> for MS Access to select records from the <code>tblMember<\/code> table based on the <code>City<\/code> field, with the ability to display <strong>all records if no City is specified<\/strong>:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>PARAMETERS &#91;Enter City:] Text ( 255 );\nSELECT *\nFROM tblMember\nWHERE (&#91;City] = &#91;Enter City:] OR &#91;Enter City:] IS NULL OR &#91;Enter City:] = '');<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><\/h3>\n\n\n\n<p>This query is designed to prompt the user to enter a City name when it runs. The key parts of the query include:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>PARAMETERS Clause:<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-code\"><code>   PARAMETERS &#91;Enter City:] Text (255);<\/code><\/pre>\n\n\n\n<p>This clause declares a parameter named <code>[Enter City:]<\/code> of type Text with a maximum length of 255 characters. When you run the query, Access will pop up a prompt box asking the user to &#8220;Enter City:&#8221;.<\/p>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>SELECT * FROM tblMember<\/strong> This selects <strong>all fields<\/strong> from the <code>tblMember<\/code> table, which fulfills the requirement to display all fields.<\/li>\n\n\n\n<li><strong>WHERE Clause Logic:<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-code\"><code>   WHERE (&#91;City] = &#91;Enter City:] OR &#91;Enter City:] IS NULL OR &#91;Enter City:] = '');<\/code><\/pre>\n\n\n\n<p>This is the crucial part for flexibility:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>[City] = [Enter City:]<\/code> filters the records to only those whose <code>City<\/code> exactly matches what the user entered.<\/li>\n\n\n\n<li><code>[Enter City:] IS NULL<\/code> allows for cases where the user cancels the prompt or enters nothing, so the filter does not exclude any records.<\/li>\n\n\n\n<li><code>[Enter City:] = ''<\/code> handles the case when the user leaves the input empty (presses OK without typing anything). This also causes the query to show <strong>all records<\/strong>.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Why this works:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>When the user <strong>enters a city name<\/strong>, only records with that city appear.<\/li>\n\n\n\n<li>When the user <strong>does not enter a city (empty string) or cancels<\/strong>, the <code>WHERE<\/code> condition still evaluates to true for all records because the OR conditions allow the filter to effectively be bypassed.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">How to save the query:<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Open MS Access.<\/li>\n\n\n\n<li>Go to the <strong>Query Design<\/strong> view.<\/li>\n\n\n\n<li>Close the Add Table dialog without adding any table.<\/li>\n\n\n\n<li>Switch to SQL View.<\/li>\n\n\n\n<li>Paste the query above.<\/li>\n\n\n\n<li>Save the query as <code>qryMemberCityParameter<\/code>.<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/learnexams.com\/blog\/wp-content\/uploads\/2025\/05\/image-241.png\" alt=\"\" class=\"wp-image-218430\"\/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Create a parameter query to select the tblMember table records for a City field value that the user specifies. Select all records from the table if the user doesn&#8217;t enter a City field value. Display all fields from the tblMember table in the query record set. Save the query as qryMemberCityParameter. The Correct Answer and [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","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-5)","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-5)","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-5)","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":[25],"tags":[],"class_list":["post-218429","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/218429","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=218429"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/218429\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=218429"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=218429"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=218429"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}