{"id":201561,"date":"2024-11-18T01:21:08","date_gmt":"2024-11-18T01:21:08","guid":{"rendered":"https:\/\/namso-gen.co\/blog\/how-to-check-default-value-of-column-in-sql-server\/"},"modified":"2024-11-18T01:21:08","modified_gmt":"2024-11-18T01:21:08","slug":"how-to-check-default-value-of-column-in-sql-server","status":"publish","type":"post","link":"https:\/\/namso-gen.co\/blog\/how-to-check-default-value-of-column-in-sql-server\/","title":{"rendered":"How to check default value of column in SQL Server?"},"content":{"rendered":"<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-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/namso-gen.co\/blog\/how-to-check-default-value-of-column-in-sql-server\/#How_to_check_default_value_of_column_in_SQL_Server\" title=\"How to check default value of column in SQL Server?\">How to check default value of column in SQL Server?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/namso-gen.co\/blog\/how-to-check-default-value-of-column-in-sql-server\/#How_can_I_modify_the_default_value_of_a_column_in_SQL_Server\" title=\"How can I modify the default value of a column in SQL Server?\">How can I modify the default value of a column in SQL Server?<\/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\/how-to-check-default-value-of-column-in-sql-server\/#Can_I_add_a_default_value_to_an_existing_column_in_SQL_Server\" title=\"Can I add a default value to an existing column in SQL Server?\">Can I add a default value to an existing column in SQL Server?<\/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\/how-to-check-default-value-of-column-in-sql-server\/#How_do_I_drop_a_default_value_constraint_from_a_column_in_SQL_Server\" title=\"How do I drop a default value constraint from a column in SQL Server?\">How do I drop a default value constraint from a column in SQL Server?<\/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\/how-to-check-default-value-of-column-in-sql-server\/#Is_it_possible_to_check_if_a_column_has_a_default_value_in_SQL_Server\" title=\"Is it possible to check if a column has a default value in SQL Server?\">Is it possible to check if a column has a default value in SQL Server?<\/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\/how-to-check-default-value-of-column-in-sql-server\/#Can_I_set_a_column_to_have_a_NULL_default_value_in_SQL_Server\" title=\"Can I set a column to have a NULL default value in SQL Server?\">Can I set a column to have a NULL default value in SQL Server?<\/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\/how-to-check-default-value-of-column-in-sql-server\/#How_can_I_see_all_default_constraints_in_a_SQL_Server_database\" title=\"How can I see all default constraints in a SQL Server database?\">How can I see all default constraints in a SQL Server database?<\/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\/how-to-check-default-value-of-column-in-sql-server\/#What_happens_to_existing_data_when_I_add_a_default_value_to_a_column_in_SQL_Server\" title=\"What happens to existing data when I add a default value to a column in SQL Server?\">What happens to existing data when I add a default value to a column in SQL Server?<\/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\/how-to-check-default-value-of-column-in-sql-server\/#Can_a_default_value_be_specified_for_multiple_columns_in_SQL_Server\" title=\"Can a default value be specified for multiple columns in SQL Server?\">Can a default value be specified for multiple columns in SQL Server?<\/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\/how-to-check-default-value-of-column-in-sql-server\/#How_do_I_drop_a_default_value_from_multiple_columns_in_SQL_Server\" title=\"How do I drop a default value from multiple columns in SQL Server?\">How do I drop a default value from multiple columns in SQL Server?<\/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\/how-to-check-default-value-of-column-in-sql-server\/#Is_it_possible_to_have_a_default_value_that_is_based_on_a_calculation_or_function_in_SQL_Server\" title=\"Is it possible to have a default value that is based on a calculation or function in SQL Server?\">Is it possible to have a default value that is based on a calculation or function in SQL Server?<\/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\/how-to-check-default-value-of-column-in-sql-server\/#Can_I_set_a_default_value_for_a_column_that_is_an_identity_column_in_SQL_Server\" title=\"Can I set a default value for a column that is an identity column in SQL Server?\">Can I set a default value for a column that is an identity column in SQL Server?<\/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\/how-to-check-default-value-of-column-in-sql-server\/#How_can_I_check_if_a_column_has_a_default_value_set_using_T-SQL\" title=\"How can I check if a column has a default value set using T-SQL?\">How can I check if a column has a default value set using T-SQL?<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"How_to_check_default_value_of_column_in_SQL_Server\"><\/span>How to check default value of column in SQL Server?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>To check the default value of a column in SQL Server, you can use the following SQL query:<\/p>\n<p>&#8220;`sql<br \/>\nSELECT COLUMN_NAME, COLUMN_DEFAULT<br \/>\nFROM INFORMATION_SCHEMA.COLUMNS<br \/>\nWHERE TABLE_NAME = &#8216;your_table_name&#8217; AND COLUMN_NAME = &#8216;your_column_name&#8217;;<br \/>\n&#8220;`<\/p>\n<p>This query will return the default value of the specified column in the specified table. Make sure to replace &#8216;your_table_name&#8217; and &#8216;your_column_name&#8217; with the actual names of your table and column.<\/p>\n<p>**SELECT COLUMN_NAME, COLUMN_DEFAULT<br \/>\nFROM INFORMATION_SCHEMA.COLUMNS<br \/>\nWHERE TABLE_NAME = &#8216;your_table_name&#8217; AND COLUMN_NAME = &#8216;your_column_name&#8217;;**<\/p>\n<p>Now, let&#8217;s address some related FAQs:<\/p>\n<h3><span class=\"ez-toc-section\" id=\"How_can_I_modify_the_default_value_of_a_column_in_SQL_Server\"><\/span>How can I modify the default value of a column in SQL Server?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\nYou can modify the default value of a column by using the ALTER TABLE statement. Here&#8217;s an example syntax:<br \/>\n&#8220;`sql<br \/>\nALTER TABLE your_table_name<br \/>\nALTER COLUMN your_column_name SET DEFAULT new_default_value;<br \/>\n&#8220;`<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Can_I_add_a_default_value_to_an_existing_column_in_SQL_Server\"><\/span>Can I add a default value to an existing column in SQL Server?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\nYes, you can add a default value to an existing column using the ALTER TABLE statement. Here&#8217;s an example syntax:<br \/>\n&#8220;`sql<br \/>\nALTER TABLE your_table_name<br \/>\nADD CONSTRAINT DF_default_constraint<br \/>\nDEFAULT new_default_value FOR your_column_name;<br \/>\n&#8220;`<\/p>\n<h3><span class=\"ez-toc-section\" id=\"How_do_I_drop_a_default_value_constraint_from_a_column_in_SQL_Server\"><\/span>How do I drop a default value constraint from a column in SQL Server?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\nYou can drop a default value constraint from a column by using the following syntax:<br \/>\n&#8220;`sql<br \/>\nALTER TABLE your_table_name<br \/>\nDROP CONSTRAINT DF_default_constraint;<br \/>\n&#8220;`<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Is_it_possible_to_check_if_a_column_has_a_default_value_in_SQL_Server\"><\/span>Is it possible to check if a column has a default value in SQL Server?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\nYes, you can check if a column has a default value by querying the INFORMATION_SCHEMA.COLUMNS view. Look for the COLUMN_DEFAULT column to see if a default value is specified.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Can_I_set_a_column_to_have_a_NULL_default_value_in_SQL_Server\"><\/span>Can I set a column to have a NULL default value in SQL Server?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\nYes, you can set a column to have a NULL default value by using the ALTER TABLE statement with the DEFAULT NULL constraint.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"How_can_I_see_all_default_constraints_in_a_SQL_Server_database\"><\/span>How can I see all default constraints in a SQL Server database?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\nYou can see all default constraints in a SQL Server database by querying the INFORMATION_SCHEMA.CONSTRAINT_COLUMN_USAGE view.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"What_happens_to_existing_data_when_I_add_a_default_value_to_a_column_in_SQL_Server\"><\/span>What happens to existing data when I add a default value to a column in SQL Server?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\nExisting data in the column will be updated with the new default value when you add a default value to a column in SQL Server.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Can_a_default_value_be_specified_for_multiple_columns_in_SQL_Server\"><\/span>Can a default value be specified for multiple columns in SQL Server?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\nYes, you can specify a default value for multiple columns by using the DEFAULT keyword followed by the desired default value for each column.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"How_do_I_drop_a_default_value_from_multiple_columns_in_SQL_Server\"><\/span>How do I drop a default value from multiple columns in SQL Server?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\nYou can drop a default value from multiple columns by using the ALTER TABLE statement to remove the default constraints from each column.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Is_it_possible_to_have_a_default_value_that_is_based_on_a_calculation_or_function_in_SQL_Server\"><\/span>Is it possible to have a default value that is based on a calculation or function in SQL Server?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\nYes, you can create a default value based on calculations or functions by defining a user-defined function and using it as the default value for a column.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Can_I_set_a_default_value_for_a_column_that_is_an_identity_column_in_SQL_Server\"><\/span>Can I set a default value for a column that is an identity column in SQL Server?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\nNo, you cannot set a default value for a column that is an identity column in SQL Server. Identity columns automatically generate unique values.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"How_can_I_check_if_a_column_has_a_default_value_set_using_T-SQL\"><\/span>How can I check if a column has a default value set using T-SQL?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\nYou can check if a column has a default value set using the sys.default_constraints system view in T-SQL. This view contains information about all default constraints in the database.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>How to check default value of column in SQL Server? To check the default value of a column in SQL Server, you can use the following SQL query: &#8220;`sql SELECT COLUMN_NAME, COLUMN_DEFAULT FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = &#8216;your_table_name&#8217; AND COLUMN_NAME = &#8216;your_column_name&#8217;; &#8220;` This query will return the default value of the specified column in &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"How to check default value of column in SQL Server?\" class=\"read-more button\" href=\"https:\/\/namso-gen.co\/blog\/how-to-check-default-value-of-column-in-sql-server\/#more-201561\">Read more<span class=\"screen-reader-text\">How to check default value of column in SQL Server?<\/span><\/a><\/p>\n","protected":false},"author":51,"featured_media":107420,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[86279],"tags":[],"class_list":["post-201561","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>How to check default value of column in SQL Server?<\/title>\n<meta name=\"description\" content=\"How to check default value of column in SQL Server? 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