{"id":102,"date":"2024-11-19T09:27:50","date_gmt":"2024-11-19T02:27:50","guid":{"rendered":"https:\/\/www.pgtutorial.com\/?page_id=102"},"modified":"2025-01-01T16:00:27","modified_gmt":"2025-01-01T09:00:27","slug":"postgresql-select","status":"publish","type":"page","link":"https:\/\/www.pgtutorial.com\/postgresql-tutorial\/postgresql-select\/","title":{"rendered":"PostgreSQL SELECT: Querying Data from a Table"},"content":{"rendered":"\n<p><strong>Summary<\/strong>: in this tutorial, you will learn how to use the PostgreSQL <code>SELECT<\/code> statement to retrieve data from a table.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id='postgresql-select-statement'>PostgreSQL SELECT statement <a href=\"#postgresql-select-statement\" class=\"anchor\" id=\"postgresql-select-statement\" title=\"Anchor for PostgreSQL SELECT statement\">#<\/a><\/h2>\n\n\n\n<p>To retrieve data from a table, you use the PostgreSQL <code>SELECT<\/code> statement.<\/p>\n\n\n\n<p>Here&#8217;s the basic syntax of the <code>SELECT<\/code> statement:<\/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\">SELECT<\/span> column1, column2, ...\n<span class=\"hljs-keyword\">FROM<\/span> <span class=\"hljs-built_in\">table_name<\/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>First, list one or more columns of a table to retrieve data after the <code>SELECT<\/code> keyword. You use a comma to separate multiple columns.<\/li>\n\n\n\n<li>Second, specify the table name in the <code>FROM<\/code> keyword.<\/li>\n<\/ul>\n\n\n\n<p>When executing the <code>SELECT FROM<\/code> statement, PostgreSQL evaluates the <code>FROM<\/code> clause before the <code>SELECT<\/code> clause.<\/p>\n\n\n\n<p>In the <code>SELECT<\/code> clause, you can retrieve data from one column:<\/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> column1\n<span class=\"hljs-keyword\">FROM<\/span> <span class=\"hljs-built_in\">table_name<\/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>Or you can retrieve data from multiple columns:<\/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\">SELECT<\/span> column1, column2\n<span class=\"hljs-keyword\">FROM<\/span> <span class=\"hljs-built_in\">table_name<\/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>If you want to retrieve data from all the columns of a table, you can list out all the columns with the assumption that the <code>table_name<\/code> has three columns:<\/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> column1, column2, column3\n<span class=\"hljs-keyword\">FROM<\/span> <span class=\"hljs-built_in\">table_name<\/span>;<\/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>Or you can use <code>SELECT *<\/code> to retrieve data from all the column of the table:<\/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\">SELECT<\/span> *\n<span class=\"hljs-keyword\">FROM<\/span> <span class=\"hljs-built_in\">table_name<\/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>Asterisk (*) or star is a shortcut for all columns. The <code>SELECT *<\/code> is often pronounced as <code>SELECT star<\/code>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id='selecting-data-from-all-table-columns'>Selecting data from all table columns <a href=\"#selecting-data-from-all-table-columns\" class=\"anchor\" id=\"selecting-data-from-all-table-columns\" title=\"Anchor for Selecting data from all table columns\">#<\/a><\/h2>\n\n\n\n<p>The following example uses the <code>SELECT<\/code> statement to retrieve data from all the columns of the <code>inventories<\/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> * <span class=\"hljs-keyword\">FROM<\/span> inventories;<\/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\/?db=select&amp;q=U0VMRUNUICogRlJPTSBpbnZlbnRvcmllczs\" 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\">       name       |  brand  | quantity |  price\n------------------+---------+----------+---------\n iPhone 14 Pro    | Apple   |       10 |  999.99\n Galaxy S23 Ultra | Samsung |       15 | 1199.99\n Pixel 7 Pro      | Google  |        8 |  899.99\n Xperia 1 IV      | Sony    |        7 | 1299.99<\/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>It returns four rows in the <code>inventories<\/code> table.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id='selecting-data-from-some-columns'>Selecting data from some columns <a href=\"#selecting-data-from-some-columns\" class=\"anchor\" id=\"selecting-data-from-some-columns\" title=\"Anchor for Selecting data from some columns\">#<\/a><\/h2>\n\n\n\n<p>The following example uses the <code>SELECT<\/code> statement to retrieve data from the <code>name<\/code> and <code>price<\/code> columns:<\/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\">SELECT<\/span>\n  <span class=\"hljs-type\">name<\/span>,\n  price\n<span class=\"hljs-keyword\">FROM<\/span>\n  inventories;<\/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\/?db=select&amp;q=U0VMRUNUIG5hbWUsIHByaWNlIEZST00gaW52ZW50b3JpZXM7\" 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\">       name       |  price\n------------------+---------\n iPhone 14 Pro    |  999.99\n Galaxy S23 Ultra | 1199.99\n Pixel 7 Pro      |  899.99\n Xperia 1 IV      | 1299.99<\/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<p>The <code>SELECT<\/code> statement returns data from the <code>name<\/code> and <code>price<\/code> columns only.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id='using-postgresql-select-statement-to-transform-data'>Using PostgreSQL SELECT statement to transform data <a href=\"#using-postgresql-select-statement-to-transform-data\" class=\"anchor\" id=\"using-postgresql-select-statement-to-transform-data\" title=\"Anchor for Using PostgreSQL SELECT statement to transform data\">#<\/a><\/h2>\n\n\n\n<p>So far, you learned how to pull the data stored from the table using the <code>SELECT<\/code> statement. The <code>SELECT<\/code> statement can also retrieve and transform the data from a table.<\/p>\n\n\n\n<p>For example, you can use the <code>SELECT<\/code> statement to calculate the inventory amount by multiplying the quantity with the price for each product in the <code>inventories<\/code> table:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-10\" 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-type\">name<\/span>,\n  quantity * price\n<span class=\"hljs-keyword\">FROM<\/span>\n  inventories;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-10\"><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\/?db=select&amp;q=U0VMRUNUIG5hbWUsIHF1YW50aXR5ICogcHJpY2UgRlJPTSBpbnZlbnRvcmllczs\" 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-11\" data-shcb-language-name=\"plaintext\" data-shcb-language-slug=\"plaintext\"><span><code class=\"hljs language-plaintext\">       name       | ?column?\n------------------+----------\n iPhone 14 Pro    |  9999.90\n Galaxy S23 Ultra | 17999.85\n Pixel 7 Pro      |  7199.92\n Xperia 1 IV      |  9099.93<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-11\"><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 statement, we retrieve data from the <code>name<\/code> column of the <code>inventories<\/code> table. Additionally, we retrieve data from the <code>quantity<\/code> and <code>price<\/code> columns and multiply them at the same time.<\/p>\n\n\n\n<p>Besides the multiplication operator (<code>*<\/code>) you can use other mathematical operators such as addition (<code>+<\/code>), subtraction (<code>-<\/code>), and division (<code>\/<\/code>).<\/p>\n\n\n\n<p>If you perform a calculation on columns in the <code>SELECT<\/code> statement, the column is often referred to as a calculated column.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id='column-aliases'>Column aliases <a href=\"#column-aliases\" class=\"anchor\" id=\"column-aliases\" title=\"Anchor for Column aliases\">#<\/a><\/h2>\n\n\n\n<p>Note that the output of the calculated column (quantity * price) is <code>?column?<\/code>. This is a temporary column name that PostgreSQL assign to it. However, its name is not meaningful.<\/p>\n\n\n\n<p>To assign a meaningful column name to a calculated column (or a regular column), you can use a column alias.<\/p>\n\n\n\n<p>A column alias is a temporary column name that you assign to the column in the <code>SELECT<\/code> statement.<\/p>\n\n\n\n<p>Here&#8217;s the syntax for defining a column alias:<\/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-built_in\">column_name<\/span> <span class=\"hljs-keyword\">AS<\/span> column_alias<\/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>In this syntax, you specify the <code>AS<\/code> keyword and the column alias after the column name.<\/p>\n\n\n\n<p>Since the <code>AS<\/code> keyword is optional, you can omit it like this:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-13\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"><span class=\"hljs-built_in\">column_name<\/span> column_alias<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-13\"><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, you can assign a column alias to the calculated column as follows:<\/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  <span class=\"hljs-type\">name<\/span>,\n  quantity * price <span class=\"hljs-keyword\">AS<\/span> amount\n<span class=\"hljs-keyword\">FROM<\/span>\n  inventories;<\/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\/?db=select&amp;q=U0VMRUNUIG5hbWUsIHF1YW50aXR5ICogcHJpY2UgQVMgYW1vdW50IEZST00gaW52ZW50b3JpZXM7\" 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\">       name       |  amount\n------------------+----------\n iPhone 14 Pro    |  9999.90\n Galaxy S23 Ultra | 17999.85\n Pixel 7 Pro      |  7199.92\n Xperia 1 IV      |  9099.93<\/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<p>The output shows that the <code>?column?<\/code> becomes <code>amount<\/code>.<\/p>\n\n\n\n<p>Alternatively, you can use a column alias without the <code>AS<\/code> keyword:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-16\" 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-type\">name<\/span>,\n  quantity * price amount\n<span class=\"hljs-keyword\">FROM<\/span>\n  inventories;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-16\"><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\/?db=select&amp;q=U0VMRUNUIG5hbWUsIHF1YW50aXR5ICogcHJpY2UgYW1vdW50IEZST00gaW52ZW50b3JpZXM7\" target=\"_blank\" rel=\"noreferrer noopener\">Try it<\/a><\/p>\n\n\n\n<p>It returns the same output.<\/p>\n\n\n\n<p>It&#8217;s important to note that you can assign a column alias to any column, not limited to the calculated column.<\/p>\n\n\n\n<p>For example, the following statement assigns the column alias <code>product_name<\/code> to the <code>name<\/code> column:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-17\" 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-type\">name<\/span> <span class=\"hljs-keyword\">AS<\/span> product_name,\n  quantity * price <span class=\"hljs-keyword\">AS<\/span> amount\n<span class=\"hljs-keyword\">FROM<\/span>\n  inventories;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-17\"><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\/?db=select&amp;q=U0VMRUNUIG5hbWUgQVMgcHJvZHVjdF9uYW1lLCBxdWFudGl0eSAqIHByaWNlIEFTIGFtb3VudCBGUk9NIGludmVudG9yaWVzOw\" 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-18\" data-shcb-language-name=\"plaintext\" data-shcb-language-slug=\"plaintext\"><span><code class=\"hljs language-plaintext\">   product_name   |  amount\n------------------+----------\n iPhone 14 Pro    |  9999.90\n Galaxy S23 Ultra | 17999.85\n Pixel 7 Pro      |  7199.92\n Xperia 1 IV      |  9099.93<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-18\"><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 PostgreSQL <code>SELECT<\/code> statement to retrieve data from one or more column of a table.<\/li>\n\n\n\n<li>Use the <code>SELECT *<\/code>  to retrieve data from all columns of a table.<\/li>\n\n\n\n<li>PostgreSQL evaluates the <code>FROM<\/code> clause before the <code>SELECT<\/code> clause.<\/li>\n\n\n\n<li>Use a column alias to assign a temporary column to a column in the <code>SELECT<\/code> statement<\/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  src=\"\/quiz\/?quiz=select\"\n  height=\"800\"\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=\"102\"\n\t\t\t\tdata-post-url=\"https:\/\/www.pgtutorial.com\/postgresql-tutorial\/postgresql-select\/\"\n\t\t\t\tdata-post-title=\"PostgreSQL SELECT: Querying Data from a Table\"\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 24\"\n\t\t\t\t\tfill=\"none\"\n\t\t\t\t\tstroke=\"currentColor\"\n\t\t\t\t\tstroke-width=\"2\"\n\t\t\t\t\tstroke-linecap=\"round\"\n\t\t\t\t\tstroke-linejoin=\"round\"\n\t\t\t\t\tclass=\"feather feather-thumbs-up block w-full h-full\"\n\t\t\t\t>\n\t\t\t\t\t<path\n\t\t\t\t\t\td=\"M14 9V5a3 3 0 0 0-3-3l-4 9v11h11.28a2 2 0 0 0 2-1.7l1.38-9a2 2 0 0 0-2-2.3zM7 22H4a2 2 0 0 1-2-2v-7a2 2 0 0 1 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PostgreSQL SELECT statement # To retrieve data from a table, you use the PostgreSQL SELECT statement. Here&#8217;s the basic syntax of the SELECT statement: In this syntax: When executing the SELECT FROM statement, PostgreSQL evaluates [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":13,"menu_order":3,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-102","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 SELECT Statement: Retrieving Data from a Table<\/title>\n<meta name=\"description\" content=\"In this tutorial, you will learn how to use the PostgreSQL SELECT statement to retrieve data from a table.\" \/>\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-select\/\" \/>\n<meta property=\"og:locale\" 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