{"id":53865,"date":"2023-02-15T11:09:54","date_gmt":"2023-02-15T11:09:54","guid":{"rendered":"https:\/\/dbtut.com\/?p=53865"},"modified":"2023-02-15T11:11:12","modified_gmt":"2023-02-15T11:11:12","slug":"create-data-type-in-postgresql","status":"publish","type":"post","link":"https:\/\/dbtut.com\/index.php\/2023\/02\/15\/create-data-type-in-postgresql\/","title":{"rendered":"Create Data Type In PostgreSQL"},"content":{"rendered":"

In today’s article, I will be explaining How to Create a PostgreSQL Data Type using the concept of Domain.<\/p>\n

It is very similar to the concept of check constraint, but unlike the check constraint, we can create the changes made as a new data type.<\/p>\n

Let’s reinforce the subject by explaining through an example;<\/p>\n

First we need to create a domain. When using the domain, you can use the following parameters according to your needs.<\/p>\n

-Default<\/p>\n

-Constraint<\/p>\n

-Not null<\/p>\n

-Null<\/p>\n

-Check<\/p>\n

I will be using the check parameter from the above parameters, so I am using the value parameter to specify the value.<\/p>\n

Below we create a domain named int_values_f and when we use this domain as a data type, we define so that data is not used except for values of 0,1,2.<\/p>\n

create domain int_values_f as integer check (value>=0 and value <3);\r\n<\/pre>\n
<\/p>\n
We have created our domain under the Postgres database.<\/p>\n
You can use the command below to check.<\/p>\n
\\dD\r\n<\/pre>\n
Below the public schema, we see the value we use in the check section, since we use the check value with the data type integer.<\/p>\n
<\/p>\n
CREATE TABLE d1_t1 (id int_values_f);\r\n<\/pre>\n
The part that is written next to the integer above is the name we give to the domain.<\/p>\n
<\/p>\n
We saw that our table was created and now let’s check the accuracy by printing the data.<\/p>\n
In the picture below, we printed the data 0,1,2,3 in the id column, but we got an error while inserting the number 3.<\/p>\n
The reason for this is that we have set the int_values_f data type to take values between 0 and 3, but 3 is not included because we said 3 is not included.<\/p>\n
<\/p>\n
<\/div>\n
<\/path><\/svg><\/i> \"Loading\"<\/p>\n
<\/div>\n","protected":false},"excerpt":{"rendered":"
In today’s article, I will be explaining How to Create a PostgreSQL Data Type using the concept of Domain. It is very similar to the concept of check constraint, but unlike the check constraint, we can create the changes made as a new data type. Let’s reinforce the subject by explaining through an example; First …<\/p>\n
<\/div>\n
<\/path><\/svg><\/i> \"Loading\"<\/p>\n
<\/div>\n","protected":false},"author":366,"featured_media":53871,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[5],"tags":[],"class_list":["post-53865","post","type-post","status-publish","format-standard","has-post-thumbnail","","category-postgres"],"aioseo_notices":[],"yoast_head":"\nCreate Data Type In PostgreSQL - Database Tutorials<\/title>\n<meta name=\"description\" content=\"In today's article, I will be explaining How to Create a PostgreSQL Data Type using the concept of Domain.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/dbtut.com\/index.php\/2023\/02\/15\/create-data-type-in-postgresql\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Create Data Type In PostgreSQL - Database Tutorials\" \/>\n<meta property=\"og:description\" content=\"In today's article, I will be explaining How to Create a PostgreSQL Data Type using the concept of Domain.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/dbtut.com\/index.php\/2023\/02\/15\/create-data-type-in-postgresql\/\" \/>\n<meta property=\"og:site_name\" content=\"Database Tutorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-02-15T11:09:54+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-02-15T11:11:12+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/dbtut.com\/wp-content\/uploads\/2023\/02\/Ekran-goruntusu-2023-02-15-140849.png\" \/>\n\t<meta property=\"og:image:width\" content=\"637\" \/>\n\t<meta property=\"og:image:height\" content=\"316\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Faruk Erdem\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Faruk Erdem\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/dbtut.com\/index.php\/2023\/02\/15\/create-data-type-in-postgresql\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/dbtut.com\/index.php\/2023\/02\/15\/create-data-type-in-postgresql\/\"},\"author\":{\"name\":\"Faruk Erdem\",\"@id\":\"https:\/\/dbtut.com\/#\/schema\/person\/a7dfc5684c116e536b4e93ee214ccbfb\"},\"headline\":\"Create Data Type In PostgreSQL\",\"datePublished\":\"2023-02-15T11:09:54+00:00\",\"dateModified\":\"2023-02-15T11:11:12+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/dbtut.com\/index.php\/2023\/02\/15\/create-data-type-in-postgresql\/\"},\"wordCount\":267,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/dbtut.com\/#organization\"},\"image\":{\"@id\":\"https:\/\/dbtut.com\/index.php\/2023\/02\/15\/create-data-type-in-postgresql\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/dbtut.com\/wp-content\/uploads\/2023\/02\/Ekran-goruntusu-2023-02-15-140849.png\",\"articleSection\":[\"PostgreSQL\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/dbtut.com\/index.php\/2023\/02\/15\/create-data-type-in-postgresql\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/dbtut.com\/index.php\/2023\/02\/15\/create-data-type-in-postgresql\/\",\"url\":\"https:\/\/dbtut.com\/index.php\/2023\/02\/15\/create-data-type-in-postgresql\/\",\"name\":\"Create Data Type In PostgreSQL - Database Tutorials\",\"isPartOf\":{\"@id\":\"https:\/\/dbtut.com\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/dbtut.com\/index.php\/2023\/02\/15\/create-data-type-in-postgresql\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/dbtut.com\/index.php\/2023\/02\/15\/create-data-type-in-postgresql\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/dbtut.com\/wp-content\/uploads\/2023\/02\/Ekran-goruntusu-2023-02-15-140849.png\",\"datePublished\":\"2023-02-15T11:09:54+00:00\",\"dateModified\":\"2023-02-15T11:11:12+00:00\",\"description\":\"In today's article, I will be explaining How to Create a PostgreSQL Data Type using the concept of Domain.\",\"breadcrumb\":{\"@id\":\"https:\/\/dbtut.com\/index.php\/2023\/02\/15\/create-data-type-in-postgresql\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/dbtut.com\/index.php\/2023\/02\/15\/create-data-type-in-postgresql\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/dbtut.com\/index.php\/2023\/02\/15\/create-data-type-in-postgresql\/#primaryimage\",\"url\":\"https:\/\/dbtut.com\/wp-content\/uploads\/2023\/02\/Ekran-goruntusu-2023-02-15-140849.png\",\"contentUrl\":\"https:\/\/dbtut.com\/wp-content\/uploads\/2023\/02\/Ekran-goruntusu-2023-02-15-140849.png\",\"width\":637,\"height\":316},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/dbtut.com\/index.php\/2023\/02\/15\/create-data-type-in-postgresql\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/dbtut.com\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Create Data Type In PostgreSQL\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/dbtut.com\/#website\",\"url\":\"https:\/\/dbtut.com\/\",\"name\":\"Database Tutorials\",\"description\":\"MSSQL, Oracle, PostgreSQL, MySQL, MariaDB, DB2, Sybase, Teradata, Big Data, NOSQL, MongoDB, Couchbase, Cassandra, Windows, Linux\",\"publisher\":{\"@id\":\"https:\/\/dbtut.com\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/dbtut.com\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/dbtut.com\/#organization\",\"name\":\"dbtut\",\"url\":\"https:\/\/dbtut.com\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/dbtut.com\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/dbtut.com\/wp-content\/uploads\/2021\/02\/dbtutlogo.jpg\",\"contentUrl\":\"https:\/\/dbtut.com\/wp-content\/uploads\/2021\/02\/dbtutlogo.jpg\",\"width\":223,\"height\":36,\"caption\":\"dbtut\"},\"image\":{\"@id\":\"https:\/\/dbtut.com\/#\/schema\/logo\/image\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\/\/dbtut.com\/#\/schema\/person\/a7dfc5684c116e536b4e93ee214ccbfb\",\"name\":\"Faruk Erdem\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/dbtut.com\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/ad1e61fb5a7c9a590e765f7cad8f2dc8332090f1ceb9a5ee2aa95c69213f0c50?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/ad1e61fb5a7c9a590e765f7cad8f2dc8332090f1ceb9a5ee2aa95c69213f0c50?s=96&d=mm&r=g\",\"caption\":\"Faruk Erdem\"},\"url\":\"https:\/\/dbtut.com\/index.php\/author\/farukerdem\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Create Data Type In PostgreSQL - Database Tutorials","description":"In today's article, I will be explaining How to Create a PostgreSQL Data Type using the concept of Domain.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/dbtut.com\/index.php\/2023\/02\/15\/create-data-type-in-postgresql\/","og_locale":"en_US","og_type":"article","og_title":"Create Data Type In PostgreSQL - Database Tutorials","og_description":"In today's article, I will be explaining How to Create a PostgreSQL Data Type using the concept of Domain.","og_url":"https:\/\/dbtut.com\/index.php\/2023\/02\/15\/create-data-type-in-postgresql\/","og_site_name":"Database Tutorials","article_published_time":"2023-02-15T11:09:54+00:00","article_modified_time":"2023-02-15T11:11:12+00:00","og_image":[{"width":637,"height":316,"url":"https:\/\/dbtut.com\/wp-content\/uploads\/2023\/02\/Ekran-goruntusu-2023-02-15-140849.png","type":"image\/png"}],"author":"Faruk Erdem","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Faruk Erdem","Est. reading time":"3 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/dbtut.com\/index.php\/2023\/02\/15\/create-data-type-in-postgresql\/#article","isPartOf":{"@id":"https:\/\/dbtut.com\/index.php\/2023\/02\/15\/create-data-type-in-postgresql\/"},"author":{"name":"Faruk Erdem","@id":"https:\/\/dbtut.com\/#\/schema\/person\/a7dfc5684c116e536b4e93ee214ccbfb"},"headline":"Create Data Type In PostgreSQL","datePublished":"2023-02-15T11:09:54+00:00","dateModified":"2023-02-15T11:11:12+00:00","mainEntityOfPage":{"@id":"https:\/\/dbtut.com\/index.php\/2023\/02\/15\/create-data-type-in-postgresql\/"},"wordCount":267,"commentCount":0,"publisher":{"@id":"https:\/\/dbtut.com\/#organization"},"image":{"@id":"https:\/\/dbtut.com\/index.php\/2023\/02\/15\/create-data-type-in-postgresql\/#primaryimage"},"thumbnailUrl":"https:\/\/dbtut.com\/wp-content\/uploads\/2023\/02\/Ekran-goruntusu-2023-02-15-140849.png","articleSection":["PostgreSQL"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/dbtut.com\/index.php\/2023\/02\/15\/create-data-type-in-postgresql\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/dbtut.com\/index.php\/2023\/02\/15\/create-data-type-in-postgresql\/","url":"https:\/\/dbtut.com\/index.php\/2023\/02\/15\/create-data-type-in-postgresql\/","name":"Create Data Type In PostgreSQL - Database Tutorials","isPartOf":{"@id":"https:\/\/dbtut.com\/#website"},"primaryImageOfPage":{"@id":"https:\/\/dbtut.com\/index.php\/2023\/02\/15\/create-data-type-in-postgresql\/#primaryimage"},"image":{"@id":"https:\/\/dbtut.com\/index.php\/2023\/02\/15\/create-data-type-in-postgresql\/#primaryimage"},"thumbnailUrl":"https:\/\/dbtut.com\/wp-content\/uploads\/2023\/02\/Ekran-goruntusu-2023-02-15-140849.png","datePublished":"2023-02-15T11:09:54+00:00","dateModified":"2023-02-15T11:11:12+00:00","description":"In today's article, I will be explaining How to Create a PostgreSQL Data Type using the concept of Domain.","breadcrumb":{"@id":"https:\/\/dbtut.com\/index.php\/2023\/02\/15\/create-data-type-in-postgresql\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/dbtut.com\/index.php\/2023\/02\/15\/create-data-type-in-postgresql\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/dbtut.com\/index.php\/2023\/02\/15\/create-data-type-in-postgresql\/#primaryimage","url":"https:\/\/dbtut.com\/wp-content\/uploads\/2023\/02\/Ekran-goruntusu-2023-02-15-140849.png","contentUrl":"https:\/\/dbtut.com\/wp-content\/uploads\/2023\/02\/Ekran-goruntusu-2023-02-15-140849.png","width":637,"height":316},{"@type":"BreadcrumbList","@id":"https:\/\/dbtut.com\/index.php\/2023\/02\/15\/create-data-type-in-postgresql\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/dbtut.com\/"},{"@type":"ListItem","position":2,"name":"Create Data Type In PostgreSQL"}]},{"@type":"WebSite","@id":"https:\/\/dbtut.com\/#website","url":"https:\/\/dbtut.com\/","name":"Database Tutorials","description":"MSSQL, Oracle, PostgreSQL, MySQL, MariaDB, DB2, Sybase, Teradata, Big Data, NOSQL, MongoDB, Couchbase, Cassandra, Windows, Linux","publisher":{"@id":"https:\/\/dbtut.com\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/dbtut.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/dbtut.com\/#organization","name":"dbtut","url":"https:\/\/dbtut.com\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/dbtut.com\/#\/schema\/logo\/image\/","url":"https:\/\/dbtut.com\/wp-content\/uploads\/2021\/02\/dbtutlogo.jpg","contentUrl":"https:\/\/dbtut.com\/wp-content\/uploads\/2021\/02\/dbtutlogo.jpg","width":223,"height":36,"caption":"dbtut"},"image":{"@id":"https:\/\/dbtut.com\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/dbtut.com\/#\/schema\/person\/a7dfc5684c116e536b4e93ee214ccbfb","name":"Faruk Erdem","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/dbtut.com\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/ad1e61fb5a7c9a590e765f7cad8f2dc8332090f1ceb9a5ee2aa95c69213f0c50?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/ad1e61fb5a7c9a590e765f7cad8f2dc8332090f1ceb9a5ee2aa95c69213f0c50?s=96&d=mm&r=g","caption":"Faruk Erdem"},"url":"https:\/\/dbtut.com\/index.php\/author\/farukerdem\/"}]}},"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/dbtut.com\/index.php\/wp-json\/wp\/v2\/posts\/53865","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dbtut.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dbtut.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dbtut.com\/index.php\/wp-json\/wp\/v2\/users\/366"}],"replies":[{"embeddable":true,"href":"https:\/\/dbtut.com\/index.php\/wp-json\/wp\/v2\/comments?post=53865"}],"version-history":[{"count":2,"href":"https:\/\/dbtut.com\/index.php\/wp-json\/wp\/v2\/posts\/53865\/revisions"}],"predecessor-version":[{"id":53872,"href":"https:\/\/dbtut.com\/index.php\/wp-json\/wp\/v2\/posts\/53865\/revisions\/53872"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dbtut.com\/index.php\/wp-json\/wp\/v2\/media\/53871"}],"wp:attachment":[{"href":"https:\/\/dbtut.com\/index.php\/wp-json\/wp\/v2\/media?parent=53865"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dbtut.com\/index.php\/wp-json\/wp\/v2\/categories?post=53865"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dbtut.com\/index.php\/wp-json\/wp\/v2\/tags?post=53865"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}