{"id":1248,"date":"2024-12-24T18:20:00","date_gmt":"2024-12-24T11:20:00","guid":{"rendered":"https:\/\/www.pgtutorial.com\/?page_id=1248"},"modified":"2025-01-05T21:25:59","modified_gmt":"2025-01-05T14:25:59","slug":"postgresql-avg-window-function","status":"publish","type":"page","link":"https:\/\/www.pgtutorial.com\/postgresql-window-functions\/postgresql-avg-window-function\/","title":{"rendered":"PostgreSQL AVG Window Function"},"content":{"rendered":"\n<p><strong>Summary<\/strong>: in this tutorial, you&#8217;ll learn how to use the PostgreSQL <code>AVG()<\/code> window function to calculate the average value in a set of values within a partition.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id='getting-started-with-the-postgresql-avg-window-function'>Getting Started with the PostgreSQL AVG() Window Function <a href=\"#getting-started-with-the-postgresql-avg-window-function\" class=\"anchor\" id=\"getting-started-with-the-postgresql-avg-window-function\" title=\"Anchor for Getting Started with the PostgreSQL AVG() Window Function\">#<\/a><\/h2>\n\n\n\n<p>In PostgreSQL, the <code>AVG()<\/code> window function returns the average value in a set of values within a partition.<\/p>\n\n\n\n<p>Here&#8217;s the syntax of the <code>AVG()<\/code> window function:<\/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\">AVG(<span class=\"hljs-keyword\">value<\/span>) <span class=\"hljs-keyword\">OVER<\/span> (\n    &#91;<span class=\"hljs-keyword\">PARTITION<\/span> <span class=\"hljs-keyword\">BY<\/span> partition_expression]\n    &#91;<span class=\"hljs-keyword\">ORDER<\/span> <span class=\"hljs-keyword\">BY<\/span> sort_expression]\n)<\/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>value<\/code> is a column or expression for which you want to calculate the average value.<\/li>\n\n\n\n<li>The <code>OVER<\/code> clause defines the window frame where the <code>AVG()<\/code> function applies.<\/li>\n\n\n\n<li><code>PARTITION BY<\/code> divides the result set into partitions by the <code>partition_expression<\/code>. The <code>partition_expression<\/code> can be one or more columns. If you omit the <code>PARTITION BY<\/code> clause, the <code>AVG()<\/code> function treats the whole result set as a single partition.<\/li>\n\n\n\n<li>The <code>ORDER BY<\/code> clause determines the order of rows within each partition.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id='postgresql-avg-window-function-examples'>PostgreSQL AVG Window Function Examples <a href=\"#postgresql-avg-window-function-examples\" class=\"anchor\" id=\"postgresql-avg-window-function-examples\" title=\"Anchor for PostgreSQL AVG Window Function Examples\">#<\/a><\/h2>\n\n\n\n<p>Let\u2019s take a look at some examples of using the <code>AVG()<\/code> window function with the <code>products<\/code> table:<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"159\" height=\"254\" src=\"https:\/\/www.pgtutorial.com\/wp-content\/uploads\/2024\/12\/products.png\" alt=\"PostgreSQL AVG Window Function - products Table\" class=\"wp-image-1051\"\/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id='finding-the-average-gross-weight-of-all-products'>Finding the Average Gross Weight of All Products <a href=\"#finding-the-average-gross-weight-of-all-products\" class=\"anchor\" id=\"finding-the-average-gross-weight-of-all-products\" title=\"Anchor for Finding the Average Gross Weight of All Products\">#<\/a><\/h3>\n\n\n\n<p>The following <code><a href=\"https:\/\/www.pgtutorial.com\/postgresql-tutorial\/postgresql-select\/\">SELECT<\/a><\/code> statement uses the <code>AVG()<\/code> window function to retrieve the average weight along with the product information of the current row:<\/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\">SELECT<\/span>\n  product_name,\n  gross_weight,\n  AVG(gross_weight) <span class=\"hljs-keyword\">OVER<\/span> () <span class=\"hljs-keyword\">AS<\/span> average_weight\n<span class=\"hljs-keyword\">FROM<\/span>\n  products\n<span class=\"hljs-keyword\">ORDER<\/span> <span class=\"hljs-keyword\">BY<\/span>\n  gross_weight;<\/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><a href=\"https:\/\/www.pgtutorial.com\/playground\/?q=U0VMRUNUIHByb2R1Y3RfbmFtZSwgZ3Jvc3Nfd2VpZ2h0LCBBVkcoZ3Jvc3Nfd2VpZ2h0KSBPVkVSICgpIEFTIGF2ZXJhZ2Vfd2VpZ2h0IEZST00gcHJvZHVjdHMgT1JERVIgQlkgZ3Jvc3Nfd2VpZ2h0Ow%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-3\" data-shcb-language-name=\"plaintext\" data-shcb-language-slug=\"plaintext\"><span><code class=\"hljs language-plaintext\">        product_name        | gross_weight |   average_weight\n----------------------------+--------------+---------------------\n Apple AirPods Pro 3        |         0.01 | 10.2492000000000000\n Samsung Galaxy Buds Pro 2  |         0.01 | 10.2492000000000000\n Samsung Galaxy Watch 6     |         0.07 | 10.2492000000000000\n Apple Watch Series 9       |         0.09 | 10.2492000000000000\n Samsung Galaxy S24         |         0.37 | 10.2492000000000000\n Apple iPhone 15            |         0.38 | 10.2492000000000000\n Sony Xperia 1 VI           |         0.42 | 10.2492000000000000\n Xiaomi Mi 14               |         0.43 | 10.2492000000000000\n Huawei Mate 60             |         0.46 | 10.2492000000000000\n Apple iPhone 15 Pro Max    |         0.49 | 10.2492000000000000\n Samsung Galaxy Z Fold 5    |         0.56 | 10.2492000000000000\n Samsung Galaxy Tab S9      |         1.10 | 10.2492000000000000\n Apple iPad Pro 12.9        |         1.42 | 10.2492000000000000\n Lenovo ThinkPad X1 Carbon  |         2.49 | 10.2492000000000000\n HP Spectre x360            |         3.09 | 10.2492000000000000\n Microsoft Surface Laptop 5 |         3.44 | 10.2492000000000000\n Dell XPS 15                |         3.97 | 10.2492000000000000\n Bose SoundLink Max         |         6.61 | 10.2492000000000000\n Apple iMac 24\"             |         9.92 | 10.2492000000000000\n Dell Inspiron 27           |        17.64 | 10.2492000000000000\n Sony HT-A7000 Soundbar     |        18.08 | 10.2492000000000000\n LG OLED TV C3              |        39.68 | 10.2492000000000000\n Sony Bravia XR A95K        |        44.09 | 10.2492000000000000\n LG G3 OLED                 |        48.50 | 10.2492000000000000\n Samsung QN900C Neo QLED    |        52.91 | 10.2492000000000000<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-3\"><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>In this example, the <code>AVG()<\/code> function treats the whole result set as a single partition because of the absence of a <code>PARTITION BY<\/code> clause, and it returns the average weight of all products along with the name and weight of the current product.<\/p>\n\n\n\n<p>To make the average weight more readable, you can cast it to a number of type <code>DEC(5,2)<\/code>:<\/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\">SELECT<\/span>\n  product_name,\n  gross_weight,\n  AVG(gross_weight) <span class=\"hljs-keyword\">OVER<\/span> () :: <span class=\"hljs-type\">DEC<\/span>(<span class=\"hljs-number\">5<\/span>,<span class=\"hljs-number\">2<\/span>) <span class=\"hljs-keyword\">AS<\/span> average_weight\n<span class=\"hljs-keyword\">FROM<\/span>\n  products\n<span class=\"hljs-keyword\">ORDER<\/span> <span class=\"hljs-keyword\">BY<\/span>\n  gross_weight;<\/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><a href=\"https:\/\/www.pgtutorial.com\/playground\/?q=U0VMRUNUIHByb2R1Y3RfbmFtZSwgZ3Jvc3Nfd2VpZ2h0LCBBVkcoZ3Jvc3Nfd2VpZ2h0KSBPVkVSICgpIDo6IERFQyg1LDIpIEFTIGF2ZXJhZ2Vfd2VpZ2h0IEZST00gcHJvZHVjdHMgT1JERVIgQlkgZ3Jvc3Nfd2VpZ2h0Ow%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-5\" data-shcb-language-name=\"plaintext\" data-shcb-language-slug=\"plaintext\"><span><code class=\"hljs language-plaintext\">        product_name        | gross_weight | average_weight\n----------------------------+--------------+----------------\n Apple AirPods Pro 3        |         0.01 |          10.25\n Samsung Galaxy Buds Pro 2  |         0.01 |          10.25\n Samsung Galaxy Watch 6     |         0.07 |          10.25\n Apple Watch Series 9       |         0.09 |          10.25\n Samsung Galaxy S24         |         0.37 |          10.25\n Apple iPhone 15            |         0.38 |          10.25\n Sony Xperia 1 VI           |         0.42 |          10.25\n Xiaomi Mi 14               |         0.43 |          10.25\n Huawei Mate 60             |         0.46 |          10.25\n Apple iPhone 15 Pro Max    |         0.49 |          10.25\n Samsung Galaxy Z Fold 5    |         0.56 |          10.25\n Samsung Galaxy Tab S9      |         1.10 |          10.25\n Apple iPad Pro 12.9        |         1.42 |          10.25\n Lenovo ThinkPad X1 Carbon  |         2.49 |          10.25\n HP Spectre x360            |         3.09 |          10.25\n Microsoft Surface Laptop 5 |         3.44 |          10.25\n Dell XPS 15                |         3.97 |          10.25\n Bose SoundLink Max         |         6.61 |          10.25\n Apple iMac 24\"             |         9.92 |          10.25\n Dell Inspiron 27           |        17.64 |          10.25\n Sony HT-A7000 Soundbar     |        18.08 |          10.25\n LG OLED TV C3              |        39.68 |          10.25\n Sony Bravia XR A95K        |        44.09 |          10.25\n LG G3 OLED                 |        48.50 |          10.25\n Samsung QN900C Neo QLED    |        52.91 |          10.25<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-5\"><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<h3 class=\"wp-block-heading\" id='finding-the-average-gross-weight-of-products-within-each-category'>Finding the Average Gross Weight of Products within Each Category <a href=\"#finding-the-average-gross-weight-of-products-within-each-category\" class=\"anchor\" id=\"finding-the-average-gross-weight-of-products-within-each-category\" title=\"Anchor for Finding the Average Gross Weight of Products within Each Category\">#<\/a><\/h3>\n\n\n\n<p>The following <code>SELECT<\/code> statement uses the <code>AVG()<\/code> window function to retrieve the average gross weight of products within each category:<\/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  category_id,\n  product_name,\n  gross_weight,\n  AVG(gross_weight) <span class=\"hljs-keyword\">OVER<\/span> (\n    <span class=\"hljs-keyword\">PARTITION<\/span> <span class=\"hljs-keyword\">BY<\/span> category_id\n  )::<span class=\"hljs-type\">DEC<\/span>(<span class=\"hljs-number\">5<\/span>,<span class=\"hljs-number\">2<\/span>) <span class=\"hljs-keyword\">AS<\/span> average_weight\n<span class=\"hljs-keyword\">FROM<\/span>\n  products\n<span class=\"hljs-keyword\">ORDER<\/span> <span class=\"hljs-keyword\">BY<\/span>\n  category_id,\n  gross_weight;<\/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=U0VMRUNUIGNhdGVnb3J5X2lkLCBwcm9kdWN0X25hbWUsIGdyb3NzX3dlaWdodCwgQVZHKGdyb3NzX3dlaWdodCkgT1ZFUiAoIFBBUlRJVElPTiBCWSBjYXRlZ29yeV9pZCApIEFTIGF2ZXJhZ2Vfd2VpZ2h0IEZST00gcHJvZHVjdHMgT1JERVIgQlkgY2F0ZWdvcnlfaWQsIGdyb3NzX3dlaWdodDs%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=\"plaintext\" data-shcb-language-slug=\"plaintext\"><span><code class=\"hljs language-plaintext\"> category_id |        product_name        | gross_weight | average_weight\n-------------+----------------------------+--------------+----------------\n           3 | Samsung Galaxy S24         |         0.37 |           0.44\n           3 | Apple iPhone 15            |         0.38 |           0.44\n           3 | Sony Xperia 1 VI           |         0.42 |           0.44\n           3 | Xiaomi Mi 14               |         0.43 |           0.44\n           3 | Huawei Mate 60             |         0.46 |           0.44\n           3 | Apple iPhone 15 Pro Max    |         0.49 |           0.44\n           3 | Samsung Galaxy Z Fold 5    |         0.56 |           0.44\n           4 | Samsung Galaxy Tab S9      |         1.10 |           1.26\n           4 | Apple iPad Pro 12.9        |         1.42 |           1.26\n           5 | Apple AirPods Pro 3        |         0.01 |           0.01\n           5 | Samsung Galaxy Buds Pro 2  |         0.01 |           0.01\n           6 | Samsung Galaxy Watch 6     |         0.07 |           0.08\n           6 | Apple Watch Series 9       |         0.09 |           0.08\n           8 | LG OLED TV C3              |        39.68 |          46.30\n           8 | Sony Bravia XR A95K        |        44.09 |          46.30\n           8 | LG G3 OLED                 |        48.50 |          46.30\n           8 | Samsung QN900C Neo QLED    |        52.91 |          46.30\n           9 | Bose SoundLink Max         |         6.61 |          12.35\n           9 | Sony HT-A7000 Soundbar     |        18.08 |          12.35\n          11 | Lenovo ThinkPad X1 Carbon  |         2.49 |           3.25\n          11 | HP Spectre x360            |         3.09 |           3.25\n          11 | Microsoft Surface Laptop 5 |         3.44 |           3.25\n          11 | Dell XPS 15                |         3.97 |           3.25\n          12 | Apple iMac 24\"             |         9.92 |          13.78\n          12 | Dell Inspiron 27           |        17.64 |          13.78<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-7\"><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>How it works:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>The <code>PARTITION BY<\/code> clause divides the rows by <code>category_id<\/code> into partitions (or categories).<\/li>\n\n\n\n<li>The <code>AVG()<\/code> window function returns the average gross weight within each category.<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id='using-avg-window-function-with-join'>Using AVG Window Function with Join <a href=\"#using-avg-window-function-with-join\" class=\"anchor\" id=\"using-avg-window-function-with-join\" title=\"Anchor for Using AVG Window Function with Join\">#<\/a><\/h3>\n\n\n\n<p>To retrieve the category names, you can <a href=\"https:\/\/www.pgtutorial.com\/postgresql-tutorial\/postgresql-inner-join\/\">join<\/a> the <code>products<\/code> table with the <code>categories<\/code> table:<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"378\" height=\"254\" src=\"https:\/\/www.pgtutorial.com\/wp-content\/uploads\/2024\/12\/products-inventories-1.png\" alt=\"Using PostgreSQL AVG Window Function with JOIN\" class=\"wp-image-1050\" srcset=\"https:\/\/www.pgtutorial.com\/wp-content\/uploads\/2024\/12\/products-inventories-1.png 378w, https:\/\/www.pgtutorial.com\/wp-content\/uploads\/2024\/12\/products-inventories-1-300x202.png 300w\" sizes=\"auto, (max-width: 378px) 100vw, 378px\" \/><\/figure>\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\">SELECT<\/span>\n  category_name,\n  product_name,\n  gross_weight,\n  AVG(gross_weight) <span class=\"hljs-keyword\">OVER<\/span> (\n    <span class=\"hljs-keyword\">PARTITION<\/span> <span class=\"hljs-keyword\">BY<\/span> category_id\n  ):: <span class=\"hljs-type\">DEC<\/span>(<span class=\"hljs-number\">5<\/span>,<span class=\"hljs-number\">2<\/span>) <span class=\"hljs-keyword\">AS<\/span> average_weight\n<span class=\"hljs-keyword\">FROM<\/span>\n  products\n  <span class=\"hljs-keyword\">JOIN<\/span> categories <span class=\"hljs-keyword\">USING<\/span> (category_id)\n<span class=\"hljs-keyword\">ORDER<\/span> <span class=\"hljs-keyword\">BY<\/span>\n  category_name,\n  gross_weight;<\/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=U0VMRUNUIGNhdGVnb3J5X25hbWUsIHByb2R1Y3RfbmFtZSwgZ3Jvc3Nfd2VpZ2h0LCBBVkcoZ3Jvc3Nfd2VpZ2h0KSBPVkVSICggUEFSVElUSU9OIEJZIGNhdGVnb3J5X2lkICk6OiBERUMoNSwyKSBBUyBhdmVyYWdlX3dlaWdodCBGUk9NIHByb2R1Y3RzIEpPSU4gY2F0ZWdvcmllcyBVU0lORyAoY2F0ZWdvcnlfaWQpIE9SREVSIEJZIGNhdGVnb3J5X25hbWUsIGdyb3NzX3dlaWdodDs%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-9\" data-shcb-language-name=\"plaintext\" data-shcb-language-slug=\"plaintext\"><span><code class=\"hljs language-plaintext\"> category_name |        product_name        | gross_weight | average_weight\n---------------+----------------------------+--------------+----------------\n Accessories   | Samsung Galaxy Buds Pro 2  |         0.01 |           0.01\n Accessories   | Apple AirPods Pro 3        |         0.01 |           0.01\n Audio Systems | Bose SoundLink Max         |         6.61 |          12.35\n Audio Systems | Sony HT-A7000 Soundbar     |        18.08 |          12.35\n Desktops      | Apple iMac 24\"             |         9.92 |          13.78\n Desktops      | Dell Inspiron 27           |        17.64 |          13.78\n Laptops       | Lenovo ThinkPad X1 Carbon  |         2.49 |           3.25\n Laptops       | HP Spectre x360            |         3.09 |           3.25\n Laptops       | Microsoft Surface Laptop 5 |         3.44 |           3.25\n Laptops       | Dell XPS 15                |         3.97 |           3.25\n Smartphones   | Samsung Galaxy S24         |         0.37 |           0.44\n Smartphones   | Apple iPhone 15            |         0.38 |           0.44\n Smartphones   | Sony Xperia 1 VI           |         0.42 |           0.44\n Smartphones   | Xiaomi Mi 14               |         0.43 |           0.44\n Smartphones   | Huawei Mate 60             |         0.46 |           0.44\n Smartphones   | Apple iPhone 15 Pro Max    |         0.49 |           0.44\n Smartphones   | Samsung Galaxy Z Fold 5    |         0.56 |           0.44\n Tablets       | Samsung Galaxy Tab S9      |         1.10 |           1.26\n Tablets       | Apple iPad Pro 12.9        |         1.42 |           1.26\n Televisions   | LG OLED TV C3              |        39.68 |          46.30\n Televisions   | Sony Bravia XR A95K        |        44.09 |          46.30\n Televisions   | LG G3 OLED                 |        48.50 |          46.30\n Televisions   | Samsung QN900C Neo QLED    |        52.91 |          46.30\n Wearables     | Samsung Galaxy Watch 6     |         0.07 |           0.08\n Wearables     | Apple Watch Series 9       |         0.09 |           0.08<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-9\"><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>AVG()<\/code> window function to retrieve the average value in a set of values within a partition.<\/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=avg-window-function\"\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 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Getting Started with the PostgreSQL AVG() Window Function # In PostgreSQL, the AVG() window function returns the average value in a set of values within a partition. Here&#8217;s [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":1072,"menu_order":13,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-1248","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 AVG Window Function<\/title>\n<meta name=\"description\" content=\"You&#039;ll learn how to use the PostgreSQL AVG() window function to calculate the average value in a set of values within a partition.\" \/>\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-window-functions\/postgresql-avg-window-function\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta 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