{"id":225538,"date":"2024-10-22T06:26:38","date_gmt":"2024-10-22T06:26:38","guid":{"rendered":"https:\/\/namso-gen.co\/blog\/what-is-the-default-value-of-column-in-sql\/"},"modified":"2024-10-22T06:26:38","modified_gmt":"2024-10-22T06:26:38","slug":"what-is-the-default-value-of-column-in-sql","status":"publish","type":"post","link":"https:\/\/namso-gen.co\/blog\/what-is-the-default-value-of-column-in-sql\/","title":{"rendered":"What is the default value of column in SQL?"},"content":{"rendered":"<p>In SQL, the default value of a column is the value that is automatically assigned to a column if no value is specified during the insertion of a new record. This means that if a column is not assigned a specific value, it will be filled with the default value.<\/p>\n<p><strong>The default value of a column in SQL can be set to a specific constant value or be defined based on a system function or an expression.<\/strong> This flexibility allows for better data management and ensures that each column has a value even when there is no explicit input.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_62 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title \" >Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/namso-gen.co\/blog\/what-is-the-default-value-of-column-in-sql\/#FAQs_about_the_default_value_of_a_column_in_SQL\" title=\"FAQs about the default value of a column in SQL:\">FAQs about the default value of a column in SQL:<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/namso-gen.co\/blog\/what-is-the-default-value-of-column-in-sql\/#1_How_can_the_default_value_of_a_column_be_defined\" title=\"1. How can the default value of a column be defined?\">1. How can the default value of a column be defined?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/namso-gen.co\/blog\/what-is-the-default-value-of-column-in-sql\/#2_Can_the_default_value_be_NULL\" title=\"2. Can the default value be NULL?\">2. Can the default value be NULL?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/namso-gen.co\/blog\/what-is-the-default-value-of-column-in-sql\/#3_Can_the_default_value_be_a_sequence_number\" title=\"3. Can the default value be a sequence number?\">3. Can the default value be a sequence number?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/namso-gen.co\/blog\/what-is-the-default-value-of-column-in-sql\/#4_What_happens_if_a_column_with_a_default_value_is_omitted_during_an_INSERT_statement\" title=\"4. What happens if a column with a default value is omitted during an INSERT statement?\">4. What happens if a column with a default value is omitted during an INSERT statement?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/namso-gen.co\/blog\/what-is-the-default-value-of-column-in-sql\/#5_How_can_the_default_value_of_a_column_be_modified_after_table_creation\" title=\"5. How can the default value of a column be modified after table creation?\">5. How can the default value of a column be modified after table creation?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/namso-gen.co\/blog\/what-is-the-default-value-of-column-in-sql\/#6_Can_the_default_value_be_changed_depending_on_the_conditions\" title=\"6. Can the default value be changed depending on the conditions?\">6. Can the default value be changed depending on the conditions?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/namso-gen.co\/blog\/what-is-the-default-value-of-column-in-sql\/#7_Can_the_default_value_of_a_column_be_a_result_of_a_calculation\" title=\"7. Can the default value of a column be a result of a calculation?\">7. Can the default value of a column be a result of a calculation?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/namso-gen.co\/blog\/what-is-the-default-value-of-column-in-sql\/#8_Is_it_possible_to_set_different_default_values_for_different_records\" title=\"8. Is it possible to set different default values for different records?\">8. Is it possible to set different default values for different records?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/namso-gen.co\/blog\/what-is-the-default-value-of-column-in-sql\/#9_What_happens_when_a_column_with_a_default_value_is_updated\" title=\"9. What happens when a column with a default value is updated?\">9. What happens when a column with a default value is updated?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/namso-gen.co\/blog\/what-is-the-default-value-of-column-in-sql\/#10_Can_the_default_value_be_specified_for_a_primary_key_column\" title=\"10. Can the default value be specified for a primary key column?\">10. Can the default value be specified for a primary key column?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/namso-gen.co\/blog\/what-is-the-default-value-of-column-in-sql\/#11_Is_the_default_value_of_a_column_required\" title=\"11. Is the default value of a column required?\">11. Is the default value of a column required?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/namso-gen.co\/blog\/what-is-the-default-value-of-column-in-sql\/#12_Can_default_values_be_used_in_combination_with_constraints\" title=\"12. Can default values be used in combination with constraints?\">12. Can default values be used in combination with constraints?<\/a><\/li><\/ul><\/nav><\/div>\n<h3><span class=\"ez-toc-section\" id=\"FAQs_about_the_default_value_of_a_column_in_SQL\"><\/span>FAQs about the default value of a column in SQL:<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h3><span class=\"ez-toc-section\" id=\"1_How_can_the_default_value_of_a_column_be_defined\"><\/span>1. How can the default value of a column be defined?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><\/p>\n<p>The default value of a column can be defined during the creation of the table schema using the DEFAULT keyword followed by the desired value or expression.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"2_Can_the_default_value_be_NULL\"><\/span>2. Can the default value be NULL?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><\/p>\n<p>Yes, the default value of a column can be set to NULL, which means that if no value is provided, the column will be populated with NULL.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"3_Can_the_default_value_be_a_sequence_number\"><\/span>3. Can the default value be a sequence number?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><\/p>\n<p>Yes, it is possible to set the default value of a column as a sequence number using sequence generation functions provided by the database platform.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"4_What_happens_if_a_column_with_a_default_value_is_omitted_during_an_INSERT_statement\"><\/span>4. What happens if a column with a default value is omitted during an INSERT statement?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><\/p>\n<p>If a column with a default value is omitted during an INSERT statement, the column will take on the specified default value.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"5_How_can_the_default_value_of_a_column_be_modified_after_table_creation\"><\/span>5. How can the default value of a column be modified after table creation?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><\/p>\n<p>The default value of a column can be modified using the ALTER TABLE statement to alter the column&#8217;s default value.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"6_Can_the_default_value_be_changed_depending_on_the_conditions\"><\/span>6. Can the default value be changed depending on the conditions?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><\/p>\n<p>No, the default value of a column is set when the table is created and remains constant unless explicitly altered.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"7_Can_the_default_value_of_a_column_be_a_result_of_a_calculation\"><\/span>7. Can the default value of a column be a result of a calculation?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><\/p>\n<p>Yes, the default value of a column can be set using an expression that performs a calculation or concatenates values from other columns.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"8_Is_it_possible_to_set_different_default_values_for_different_records\"><\/span>8. Is it possible to set different default values for different records?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><\/p>\n<p>No, the default value defined for a column applies to all records that do not provide an explicit value during the INSERT statement.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"9_What_happens_when_a_column_with_a_default_value_is_updated\"><\/span>9. What happens when a column with a default value is updated?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><\/p>\n<p>Updating a column with a default value will override the default value and set the column to the new specified value.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"10_Can_the_default_value_be_specified_for_a_primary_key_column\"><\/span>10. Can the default value be specified for a primary key column?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><\/p>\n<p>No, the primary key column should have a value specified explicitly during the insertion of a new record.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"11_Is_the_default_value_of_a_column_required\"><\/span>11. Is the default value of a column required?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><\/p>\n<p>No, the default value is optional. If no default value is provided, the column will be left empty (NULL) if no value is explicitly specified.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"12_Can_default_values_be_used_in_combination_with_constraints\"><\/span>12. Can default values be used in combination with constraints?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><\/p>\n<p>Yes, default values can be used in conjunction with constraints to ensure that the inserted values meet specific conditions defined by the constraints.<\/p>\n<p>In conclusion, the default value of a column in SQL is the value automatically assigned to a column if no explicit value is provided during the insertion of a new record. It can be set to a specific constant, NULL, or be derived from a system function or expression. Understanding and properly utilizing default values contribute to maintaining data integrity and streamlining database operations.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In SQL, the default value of a column is the value that is automatically assigned to a column if no value is specified during the insertion of a new record. This means that if a column is not assigned a specific value, it will be filled with the default value. The default value of a &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"What is the default value of column in SQL?\" class=\"read-more button\" href=\"https:\/\/namso-gen.co\/blog\/what-is-the-default-value-of-column-in-sql\/#more-225538\">Read more<span class=\"screen-reader-text\">What is the default value of column in SQL?<\/span><\/a><\/p>\n","protected":false},"author":56,"featured_media":107420,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[86279],"tags":[],"class_list":["post-225538","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-learn","no-featured-image-padding"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>What is the default value of column in SQL?<\/title>\n<meta name=\"description\" content=\"In SQL, the default value of a column is the value that is automatically assigned to a column if no value is specified during the insertion of a new\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/namso-gen.co\/blog\/what-is-the-default-value-of-column-in-sql\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What is the default value of column in SQL?\" \/>\n<meta property=\"og:description\" content=\"In SQL, the default value of a column is the value that is automatically assigned to a column if no value is specified during the insertion of a new\" \/>\n<meta property=\"og:url\" content=\"https:\/\/namso-gen.co\/blog\/what-is-the-default-value-of-column-in-sql\/\" \/>\n<meta property=\"og:site_name\" content=\"Namso Gen Blog - 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