{"id":1282,"date":"2024-12-30T22:05:03","date_gmt":"2024-12-30T15:05:03","guid":{"rendered":"https:\/\/www.pgtutorial.com\/?page_id=1282"},"modified":"2025-01-03T10:31:13","modified_gmt":"2025-01-03T03:31:13","slug":"postgresql-create-procedure","status":"publish","type":"page","link":"https:\/\/www.pgtutorial.com\/postgresql-tutorial\/postgresql-create-procedure\/","title":{"rendered":"PostgreSQL CREATE PROCEDURE Statement"},"content":{"rendered":"\n<p><strong>Summary<\/strong>: in this tutorial, you&#8217;ll learn how to use the PostgreSQL <code>CREATE PROCEDURE<\/code> statement to create a new stored procedure.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id='introduction-to-postgresql-create-procedure-statement'>Introduction to PostgreSQL CREATE PROCEDURE statement <a href=\"#introduction-to-postgresql-create-procedure-statement\" class=\"anchor\" id=\"introduction-to-postgresql-create-procedure-statement\" title=\"Anchor for Introduction to PostgreSQL CREATE PROCEDURE statement\">#<\/a><\/h2>\n\n\n\n<p>A stored procedure is a precompiled set of SQL statements stored and executed on a PostgreSQL database server.<\/p>\n\n\n\n<p>To define a stored procedure, you use the <code>CREATE PROCEUDRE<\/code> statement with the following syntax:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-1\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"><span class=\"hljs-keyword\">CREATE<\/span> <span class=\"hljs-keyword\">OR REPLACE<\/span> <span class=\"hljs-keyword\">PROCEDURE<\/span> procedure_name(parameter_list) \n<span class=\"hljs-keyword\">AS<\/span>\n$$<span class=\"pgsql\">\n<span class=\"hljs-comment\">-- body of the stored procedure<\/span>\n$$<\/span>\n<span class=\"hljs-keyword\">LANGUAGE<\/span> <span class=\"hljs-keyword\">SQL<\/span>;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-1\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>In this syntax:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>CREATE PROCEDURE<\/code>: Defines a new stored procedure.<\/li>\n\n\n\n<li><code>OR REPLACE<\/code>: Replaces the existing stored procedure if it exists.<\/li>\n\n\n\n<li><code>procedure_name<\/code>: Specifies the name of the stored procedure.<\/li>\n\n\n\n<li><code>parameter_list<\/code>: A list of parameters of the stored procedure.<\/li>\n\n\n\n<li><code>AS<\/code>: Indicates the start of the stored procedure&#8217;s body.<\/li>\n\n\n\n<li><code>$$<\/code>: Encloses the code that makes up the body of the stored procedure.<\/li>\n\n\n\n<li><code>LANGUAGE SQL<\/code>: Specifies that the language of the stored procedure is SQL. You can also use other procedure languages, such as PL\/pgSQL.<\/li>\n<\/ul>\n\n\n\n<p>If you want to execute multiple SQL statements, place them between a <code>BEGIN ATOMIC ... END<\/code> block:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-2\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"><span class=\"hljs-keyword\">CREATE<\/span> <span class=\"hljs-keyword\">OR REPLACE<\/span> <span class=\"hljs-keyword\">PROCEDURE<\/span> procedure_name(parameter_list) \n<span class=\"hljs-keyword\">LANGUAGE<\/span> <span class=\"hljs-keyword\">SQL<\/span>\n<span class=\"hljs-keyword\">BEGIN<\/span> ATOMIC\n    sql_statement1;\n    sql_statement2;\n<span class=\"hljs-keyword\">END<\/span>;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-2\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>In this syntax, the <code>BEGIN ATOMIC ... END<\/code> block ensures that all SQL statements (<code>sql_statement1<\/code>, <code>sql_staetment2<\/code>, &#8230;) within the block succeed, or none of them do. In other words, it will execute all the statements as a <em>single atomic unit<\/em>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id='example-of-a-basic-postgresql-create-procedure-statement'>Example of a Basic PostgreSQL CREATE PROCEDURE Statement <a href=\"#example-of-a-basic-postgresql-create-procedure-statement\" class=\"anchor\" id=\"example-of-a-basic-postgresql-create-procedure-statement\" title=\"Anchor for Example of a Basic PostgreSQL CREATE PROCEDURE Statement\">#<\/a><\/h2>\n\n\n\n<p>The following example uses the <code>CREATE PROCEDURE<\/code> statement to define a new stored procedure <code>update_safety_stock<\/code> that updates the safety stock of a product specified by product id:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-3\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"><span class=\"hljs-keyword\">CREATE<\/span> <span class=\"hljs-keyword\">OR REPLACE<\/span> <span class=\"hljs-keyword\">PROCEDURE<\/span> update_safety_stock(\n    id <span class=\"hljs-type\">INT<\/span>, \n    new_safety_stock <span class=\"hljs-type\">INT<\/span>\n)\n<span class=\"hljs-keyword\">AS<\/span>\n$$<span class=\"pgsql\">\n    <span class=\"hljs-keyword\">UPDATE<\/span> products\n    <span class=\"hljs-keyword\">SET<\/span> safety_stock = new_safety_stock\n    <span class=\"hljs-keyword\">WHERE<\/span> product_id = id;\n$$<\/span>\n<span class=\"hljs-keyword\">LANGUAGE<\/span> <span class=\"hljs-keyword\">SQL<\/span>;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-3\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p><a href=\"https:\/\/www.pgtutorial.com\/playground\/?q=Q1JFQVRFIE9SIFJFUExBQ0UgUFJPQ0VEVVJFIHVwZGF0ZV9zYWZldHlfc3RvY2soIGlkIElOVCwgbmV3X3NhZmV0eV9zdG9jayBJTlQgKSBBUyAkJCBVUERBVEUgcHJvZHVjdHMgU0VUIHNhZmV0eV9zdG9jayA9IG5ld19zYWZldHlfc3RvY2sgV0hFUkUgcHJvZHVjdF9pZCA9IGlkOyAkJCBMQU5HVUFHRSBTUUw7\" target=\"_blank\" rel=\"noreferrer noopener\">Try it<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id='calling-a-postgresql-stored-procedure'>Calling a PostgreSQL Stored Procedure <a href=\"#calling-a-postgresql-stored-procedure\" class=\"anchor\" id=\"calling-a-postgresql-stored-procedure\" title=\"Anchor for Calling a PostgreSQL Stored Procedure\">#<\/a><\/h2>\n\n\n\n<p>To execute a PostgreSQL stored procedure, use the <code>CALL<\/code> statement with the following syntax:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-4\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"><span class=\"hljs-keyword\">CALL<\/span> procedure_name(arguments);<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-4\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>For example, to update the safety stock of the product id <code>1<\/code> to <code>20<\/code>:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-5\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"><span class=\"hljs-keyword\">CALL<\/span> update_safety_stock(<span class=\"hljs-number\">1<\/span>, <span class=\"hljs-number\">20<\/span>);<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-5\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p><a href=\"https:\/\/www.pgtutorial.com\/playground\/?q=Q0FMTCB1cGRhdGVfc2FmZXR5X3N0b2NrICgxLCAyMCk7\" target=\"_blank\" rel=\"noreferrer noopener\">Try it<\/a><\/p>\n\n\n\n<p>To verify the update, retrieve data from the <code>products<\/code> table:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-6\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"><span class=\"hljs-keyword\">SELECT<\/span>\n  product_id,\n  safety_stock\n<span class=\"hljs-keyword\">FROM<\/span>\n  products\n<span class=\"hljs-keyword\">WHERE<\/span>\n  product_id = <span class=\"hljs-number\">1<\/span>;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-6\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p><a href=\"https:\/\/www.pgtutorial.com\/playground\/?q=U0VMRUNUIHByb2R1Y3RfaWQsIHNhZmV0eV9zdG9jayBGUk9NIHByb2R1Y3RzIFdIRVJFIHByb2R1Y3RfaWQgPSAxOw%3D%3D\" target=\"_blank\" rel=\"noreferrer noopener\">Try it<\/a><\/p>\n\n\n\n<p>Output:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-7\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"> product_id | safety_stock\n<span class=\"hljs-comment\">------------+--------------<\/span>\n          <span class=\"hljs-number\">1<\/span> |           <span class=\"hljs-number\">20<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-7\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h2 class=\"wp-block-heading\" id='creating-a-stored-procedure-that-executes-multiple-statements'>Creating a Stored Procedure that Executes Multiple Statements <a href=\"#creating-a-stored-procedure-that-executes-multiple-statements\" class=\"anchor\" id=\"creating-a-stored-procedure-that-executes-multiple-statements\" title=\"Anchor for Creating a Stored Procedure that Executes Multiple Statements\">#<\/a><\/h2>\n\n\n\n<p>We&#8217;ll use the <code>transactions<\/code> and <code>inventories<\/code> tables:<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"144\" height=\"208\" src=\"https:\/\/www.pgtutorial.com\/wp-content\/uploads\/2024\/12\/transactions.png\" alt=\"\" class=\"wp-image-1054\"\/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"144\" height=\"139\" src=\"https:\/\/www.pgtutorial.com\/wp-content\/uploads\/2024\/12\/inventories.png\" alt=\"\" class=\"wp-image-1046\"\/><\/figure>\n\n\n\n<p>First, define a stored procedure called <code>update_inventory<\/code> that updates the transaction and inventory:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-8\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"><span class=\"hljs-keyword\">CREATE<\/span> <span class=\"hljs-keyword\">OR REPLACE<\/span> <span class=\"hljs-keyword\">PROCEDURE<\/span> update_inventory(\n    p_id <span class=\"hljs-type\">INT<\/span>,\n    w_id <span class=\"hljs-type\">INT<\/span>,\n    u_id <span class=\"hljs-type\">INT<\/span>,\n    <span class=\"hljs-keyword\">type<\/span> transaction_type,\n    qty <span class=\"hljs-type\">INT<\/span>\n)\n<span class=\"hljs-keyword\">LANGUAGE<\/span> <span class=\"hljs-keyword\">SQL<\/span>\n<span class=\"hljs-keyword\">BEGIN<\/span> ATOMIC\n    <span class=\"hljs-keyword\">INSERT<\/span> <span class=\"hljs-keyword\">INTO<\/span> transactions (product_id, warehouse_id, user_id, <span class=\"hljs-keyword\">type<\/span>, quantity, transaction_date)\n    <span class=\"hljs-keyword\">VALUES<\/span> (p_id, w_id, u_id, <span class=\"hljs-keyword\">type<\/span>, qty, <span class=\"hljs-built_in\">CURRENT_DATE<\/span>);\n\n    <span class=\"hljs-keyword\">UPDATE<\/span> inventories\n    <span class=\"hljs-keyword\">SET<\/span> quantity = <span class=\"hljs-keyword\">CASE<\/span> <span class=\"hljs-keyword\">type<\/span> \n        <span class=\"hljs-keyword\">WHEN<\/span> <span class=\"hljs-string\">'receipt'<\/span> <span class=\"hljs-keyword\">THEN<\/span> quantity + qty \n        <span class=\"hljs-keyword\">WHEN<\/span> <span class=\"hljs-string\">'issue'<\/span> <span class=\"hljs-keyword\">THEN<\/span> quantity - qty \n        <span class=\"hljs-keyword\">END<\/span>\n    <span class=\"hljs-keyword\">WHERE<\/span> product_id = p_id <span class=\"hljs-keyword\">AND<\/span> \n          warehouse_id = w_id;\n<span class=\"hljs-keyword\">END<\/span>;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-8\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p><a href=\"https:\/\/www.pgtutorial.com\/playground\/?q=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%3D%3D\" target=\"_blank\" rel=\"noreferrer noopener\">Try it<\/a><\/p>\n\n\n\n<p>Then, attempt to issue <code>10000<\/code> products with id 1 from warehouse 1 by calling the <code>update_inventory<\/code> stored procedure:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-9\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"><span class=\"hljs-keyword\">CALL<\/span> update_inventory(<span class=\"hljs-number\">1<\/span>, <span class=\"hljs-number\">1<\/span>, <span class=\"hljs-number\">1<\/span>, <span class=\"hljs-string\">'issue'<\/span>, <span class=\"hljs-number\">10000<\/span>);<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-9\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p><a href=\"https:\/\/www.pgtutorial.com\/playground\/?q=Q0FMTCB1cGRhdGVfaW52ZW50b3J5KDEsIDEsIDEsICdpc3N1ZScsIDEwMDAwKTs%3D\" target=\"_blank\" rel=\"noreferrer noopener\">Try it<\/a><\/p>\n\n\n\n<p>If PostgreSQL issues the following error:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-10\" data-shcb-language-name=\"plaintext\" data-shcb-language-slug=\"plaintext\"><span><code class=\"hljs language-plaintext\">new row for relation \"inventories\" violates check constraint \"inventories_quantity_check\"<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-10\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">plaintext<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">plaintext<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>The reason is that the inventory is not sufficient. The <code>UPDATE<\/code> statement caused a <code><a href=\"https:\/\/www.pgtutorial.com\/postgresql-tutorial\/postgresql-check-constraint\/\">CHECK<\/a><\/code> constraint violation. Since the <code>UPDATE<\/code> statement failed, both the <code><a href=\"https:\/\/www.pgtutorial.com\/postgresql-tutorial\/postgresql-insert\/\">INSERT<\/a><\/code> and <code><a href=\"https:\/\/www.pgtutorial.com\/postgresql-tutorial\/postgresql-update\/\">UPDATE<\/a><\/code> statements also failed.<\/p>\n\n\n\n<p>Next, issue 10 products with id 1 from warehouse 1:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-11\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"><span class=\"hljs-keyword\">CALL<\/span> update_inventory(<span class=\"hljs-number\">1<\/span>, <span class=\"hljs-number\">1<\/span>, <span class=\"hljs-number\">1<\/span>, <span class=\"hljs-string\">'issue'<\/span>, <span class=\"hljs-number\">10<\/span>);<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-11\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p><a href=\"https:\/\/www.pgtutorial.com\/playground\/?q=Q0FMTCB1cGRhdGVfaW52ZW50b3J5KDEsIDEsIDEsICdpc3N1ZScsIDEwKTs%3D\" target=\"_blank\" rel=\"noreferrer noopener\">Try it<\/a><\/p>\n\n\n\n<p>Finally, verify the inventory by querying data from the <code>transactions<\/code> and <code>inventories<\/code> tables:<\/p>\n\n\n\n<p>Querying the <code>transactions<\/code> table:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-12\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"><span class=\"hljs-keyword\">SELECT<\/span>\n  <span class=\"hljs-keyword\">type<\/span>,\n  quantity\n<span class=\"hljs-keyword\">FROM<\/span>\n  transactions\n<span class=\"hljs-keyword\">WHERE<\/span>\n  product_id = <span class=\"hljs-number\">1<\/span>\n  <span class=\"hljs-keyword\">AND<\/span> warehouse_id = <span class=\"hljs-number\">1<\/span>\n  <span class=\"hljs-keyword\">AND<\/span> <span class=\"hljs-keyword\">type<\/span> = <span class=\"hljs-string\">'issue'<\/span>\n  <span class=\"hljs-keyword\">AND<\/span> transaction_date = <span class=\"hljs-built_in\">CURRENT_DATE<\/span>;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-12\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p><a href=\"https:\/\/www.pgtutorial.com\/playground\/?q=U0VMRUNUIHR5cGUsIHF1YW50aXR5IEZST00gdHJhbnNhY3Rpb25zIFdIRVJFIHByb2R1Y3RfaWQgPSAxIEFORCB3YXJlaG91c2VfaWQgPSAxIEFORCB0eXBlID0gJ2lzc3VlJyBBTkQgdHJhbnNhY3Rpb25fZGF0ZSA9IENVUlJFTlRfREFURTs%3D\" target=\"_blank\" rel=\"noreferrer noopener\">Try it<\/a><\/p>\n\n\n\n<p>Output:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-13\" data-shcb-language-name=\"plaintext\" data-shcb-language-slug=\"plaintext\"><span><code class=\"hljs language-plaintext\"> type  | quantity\n-------+----------\n issue |       10<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-13\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">plaintext<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">plaintext<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>Querying the <code>inventories<\/code> table:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-14\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"><span class=\"hljs-keyword\">SELECT<\/span>\n  quantity\n<span class=\"hljs-keyword\">FROM<\/span>\n  inventories\n<span class=\"hljs-keyword\">WHERE<\/span>\n  product_id = <span class=\"hljs-number\">1<\/span>\n  <span class=\"hljs-keyword\">AND<\/span> warehouse_id = <span class=\"hljs-number\">1<\/span>;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-14\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p><a href=\"https:\/\/www.pgtutorial.com\/playground\/?q=U0VMRUNUIHF1YW50aXR5IEZST00gaW52ZW50b3JpZXMgV0hFUkUgcHJvZHVjdF9pZCA9IDEgQU5EIHdhcmVob3VzZV9pZCA9IDE7\" target=\"_blank\" rel=\"noreferrer noopener\">Try it<\/a><\/p>\n\n\n\n<p>Output:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-15\" data-shcb-language-name=\"plaintext\" data-shcb-language-slug=\"plaintext\"><span><code class=\"hljs language-plaintext\"> quantity\n----------\n       90<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-15\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">plaintext<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">plaintext<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h2 class=\"wp-block-heading\" id='summary'>Summary <a href=\"#summary\" class=\"anchor\" id=\"summary\" title=\"Anchor for Summary\">#<\/a><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Use the <code>CREATE PROCEDURE<\/code> statement to create a new stored procedure.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id='quiz'>Quiz <a href=\"#quiz\" class=\"anchor\" id=\"quiz\" title=\"Anchor for Quiz\">#<\/a><\/h2>\n\n\n\n<iframe loading=\"lazy\"\n  name=\"quiz\"\n  src=\"\/quiz\/?quiz=create-procedure\"\n  height=\"700\"\n  width=\"600\"\n  class=\"iframe\"\n><\/iframe>\n\n<div class=\"helpful-block-content\" data-title=\"\">\n\t<header>\n\t\t<div class=\"wth-question\">Was this tutorial helpful ?<\/div>\n\t\t<div class=\"wth-thumbs\">\n\t\t\t<button\n\t\t\t\tdata-post=\"1282\"\n\t\t\t\tdata-post-url=\"https:\/\/www.pgtutorial.com\/postgresql-tutorial\/postgresql-create-procedure\/\"\n\t\t\t\tdata-post-title=\"PostgreSQL CREATE PROCEDURE Statement\"\n\t\t\t\tdata-response=\"1\"\n\t\t\t\tclass=\"wth-btn-rounded wth-yes-btn\"\n\t\t\t>\n\t\t\t\t<svg\n\t\t\t\t\txmlns=\"http:\/\/www.w3.org\/2000\/svg\"\n\t\t\t\t\tviewBox=\"0 0 24 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procedure.<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":13,"menu_order":80,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-1282","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>PostgreSQL CREATE PROCEDURE Statement<\/title>\n<meta name=\"description\" content=\"In this tutorial, you&#039;ll learn how to use the PostgreSQL CREATE PROCEDURE statement to create a new stored procedure.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.pgtutorial.com\/postgresql-tutorial\/postgresql-create-procedure\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"PostgreSQL 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