{"id":216202,"date":"2025-05-19T01:29:48","date_gmt":"2025-05-19T01:29:48","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=216202"},"modified":"2025-05-19T01:29:50","modified_gmt":"2025-05-19T01:29:50","slug":"which-of-the-following-is-not-a-valid-aggregate-function","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/05\/19\/which-of-the-following-is-not-a-valid-aggregate-function\/","title":{"rendered":"Which of the following is not a valid aggregate function"},"content":{"rendered":"\n

. Which of the following is not a valid aggregate function?<\/strong>
a. COUNT
b. COMPUTE
c. SUM
d. MAX<\/p>\n\n\n\n

To eliminate duplicates from a query result we use:
a. Unique
b. Distinct
c. *
d. where<\/p>\n\n\n\n

    <\/ol>\n\n\n\n

    The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n

    Correct Answers:<\/strong><\/h3>\n\n\n\n
      \n
    1. Which of the following is not a valid aggregate function?<\/strong>
      Answer: b. COMPUTE<\/strong><\/li>\n\n\n\n
    2. To eliminate duplicates from a query result we use:<\/strong>
      Answer: b. Distinct<\/strong><\/li>\n<\/ol>\n\n\n\n
      \n\n\n\n

      Detailed Explanation (300+ words):<\/strong><\/h3>\n\n\n\n

      1. Aggregate Functions in SQL:<\/strong><\/h4>\n\n\n\n

      Aggregate functions in SQL are used to perform calculations on a set of values and return a single value. These are commonly used in conjunction with the GROUP BY<\/code> clause to summarize data. Examples of valid aggregate functions include:<\/p>\n\n\n\n

      The option COMPUTE<\/code><\/strong> is not<\/strong> a valid aggregate function. While the word “compute” might sound like it performs a calculation, it is not an SQL aggregate function recognized by standard SQL syntax. In some older versions of SQL Server, COMPUTE<\/code> was a keyword used to display summary values, but it has been deprecated and is not considered an aggregate function itself. Therefore, the correct answer is b. COMPUTE<\/strong>.<\/p>\n\n\n\n

      2. Removing Duplicates in SQL:<\/strong><\/h4>\n\n\n\n

      When retrieving data from a database using SQL, you might encounter duplicate rows. To ensure that only unique rows are returned, the DISTINCT<\/code><\/strong> keyword is used in the SELECT<\/code> statement. For example:<\/p>\n\n\n\n

      SELECT DISTINCT city FROM customers;<\/code><\/pre>\n\n\n\n
      This query returns a list of unique cities from the customers table, eliminating any duplicate entries.<\/p>\n\n\n\n
      Let’s evaluate the options:<\/p>\n\n\n\n
        \n
      • a. Unique<\/strong>: This is not valid SQL syntax. Although some databases use “UNIQUE” as a constraint, it is not used in the SELECT<\/code> statement to eliminate duplicates.<\/li>\n\n\n\n
      • b. Distinct<\/strong>: This is the correct keyword used to remove duplicate records from the result set.<\/li>\n\n\n\n
      • c. *<\/strong>: This symbol selects all columns from a table but does not eliminate duplicates.<\/li>\n\n\n\n
      • d. Where<\/strong>: This is used to filter records based on conditions but does not remove duplicates.<\/li>\n<\/ul>\n\n\n\n
        Therefore, to eliminate duplicate rows from a query result, the correct answer is b. Distinct<\/strong>.<\/p>\n\n\n\n
        \n\n\n\n
        Summary:<\/strong><\/h3>\n\n\n\n
          \n
        • COMPUTE<\/code> is not a valid aggregate function.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"
          . Which of the following is not a valid aggregate function?a. COUNTb. COMPUTEc. SUMd. MAX To eliminate duplicates from a query result we use:a. Uniqueb. Distinctc. *d. where The Correct Answer and Explanation is: Correct Answers: Detailed Explanation (300+ words): 1. Aggregate Functions in SQL: Aggregate functions in SQL are used to perform calculations on […]<\/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-216202","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/216202","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=216202"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/216202\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=216202"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=216202"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=216202"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}