{"id":189484,"date":"2025-02-09T08:42:08","date_gmt":"2025-02-09T08:42:08","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=189484"},"modified":"2025-02-09T08:42:11","modified_gmt":"2025-02-09T08:42:11","slug":"which-of-the-following-is-not-a-valid-sql-command","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/02\/09\/which-of-the-following-is-not-a-valid-sql-command\/","title":{"rendered":"Which of the following is not a valid SQL command"},"content":{"rendered":"\n<p>i)Which of the following is not a valid SQL command?<br>a. UPDATE<br>b. SHOW<br>c. SELECT<br>d. INSERT<br>e. All of the above<br>f. None of the above<\/p>\n\n\n\n<p>ii)Which of the following commands list columns of a table in MS SQL?<br>a. DESCRIBE<br>b. DESC<br>c. EXEC SP_TABLE<br>d. EXEC SP_COLUMNS<br>e. All of the above.<br>f. None of the above.<\/p>\n\n\n\n<p><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-6-color\"><strong>The Correct Answer and Explanation is :<\/strong><\/mark><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">i) Which of the following is not a valid SQL command?<\/h3>\n\n\n\n<p><strong>Answer: b. SHOW<\/strong><\/p>\n\n\n\n<p><strong>Explanation:<\/strong><br>In SQL, there are several types of commands used to interact with databases, such as <code>SELECT<\/code>, <code>INSERT<\/code>, <code>UPDATE<\/code>, etc. However, <code>SHOW<\/code> is not a standard SQL command for querying data or modifying a database. The <code>SHOW<\/code> command is typically used in some databases like MySQL to display information about database objects (e.g., tables, columns, indexes). For example:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>SHOW TABLES;<\/code> displays the list of tables in the current database in MySQL.<\/li>\n\n\n\n<li><code>SHOW COLUMNS FROM table_name;<\/code> displays column information for a specific table.<\/li>\n<\/ul>\n\n\n\n<p>But in standard SQL (which is implemented in systems like PostgreSQL, MS SQL Server, etc.), commands like <code>SELECT<\/code>, <code>UPDATE<\/code>, and <code>INSERT<\/code> are the ones used, while <code>SHOW<\/code> is not included as a standard command.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">ii) Which of the following commands list columns of a table in MS SQL?<\/h3>\n\n\n\n<p><strong>Answer: d. EXEC SP_COLUMNS<\/strong><\/p>\n\n\n\n<p><strong>Explanation:<\/strong><br>In MS SQL Server, to list the columns of a table, the correct command to use is <code>EXEC SP_COLUMNS<\/code>. This is a system stored procedure that returns metadata about the columns of a specified table, including column names, data types, and other properties.<\/p>\n\n\n\n<p>Let&#8217;s break down the options:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>a. DESCRIBE<\/strong>: This is not a valid command in MS SQL Server. In MySQL, <code>DESCRIBE table_name;<\/code> is used to list columns, but not in MS SQL.<\/li>\n\n\n\n<li><strong>b. DESC<\/strong>: Like <code>DESCRIBE<\/code>, this is not a valid command in MS SQL Server. It is also commonly used in MySQL to get a similar result.<\/li>\n\n\n\n<li><strong>c. EXEC SP_TABLE<\/strong>: This is incorrect. While <code>SP_TABLE<\/code> is a stored procedure in SQL Server, it is used for listing tables, not columns.<\/li>\n\n\n\n<li><strong>d. EXEC SP_COLUMNS<\/strong>: This is the correct command in MS SQL Server. It lists all columns in a table, including their types, sizes, and whether they are nullable.<\/li>\n\n\n\n<li><strong>e. All of the above<\/strong>: Incorrect, as only <code>EXEC SP_COLUMNS<\/code> is valid in MS SQL Server for this task.<\/li>\n\n\n\n<li><strong>f. None of the above<\/strong>: Incorrect, as <code>EXEC SP_COLUMNS<\/code> is valid.<\/li>\n<\/ul>\n\n\n\n<p>Thus, <strong><code>EXEC SP_COLUMNS<\/code><\/strong> is the right way to retrieve column details in MS SQL Server.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>i)Which of the following is not a valid SQL command?a. UPDATEb. SHOWc. SELECTd. INSERTe. All of the abovef. None of the above ii)Which of the following commands list columns of a table in MS SQL?a. DESCRIBEb. DESCc. EXEC SP_TABLEd. EXEC SP_COLUMNSe. All of the above.f. None of the above. The Correct Answer and Explanation is [&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-189484","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/189484","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=189484"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/189484\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=189484"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=189484"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=189484"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}