{"id":2985,"date":"2013-01-17T01:01:50","date_gmt":"2013-01-17T09:01:50","guid":{"rendered":"http:\/\/www.mysqltutorial.org\/?page_id=2985"},"modified":"2023-09-24T21:10:48","modified_gmt":"2023-09-25T04:10:48","slug":"perl-mysql-select","status":"publish","type":"page","link":"https:\/\/www.mysqltutorial.org\/perl-mysql\/perl-mysql-select\/","title":{"rendered":"Perl MySQL Select Data"},"content":{"rendered":"\n<p><strong>Summary<\/strong>: in this tutorial, we will show you how to query data from MySQL database tables using Perl DBI.<\/p>\n\n\n\n<p>To query data from the MySQL database tables from the Perl program, you use the following steps:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a title=\"Perl MySQL Connect\" href=\"https:\/\/www.mysqltutorial.org\/perl-mysql\/perl-mysql-connect\/\">Connect to the MySQL database<\/a> by calling the&nbsp; <code>connect()<\/code> method.<\/li>\n\n\n\n<li>Prepare a <code>SELECT<\/code> statement for the execution by using the&nbsp; <code>prepare()<\/code> method of the database handle object. The&nbsp; <code>prepare()<\/code> method returns a statement handle object that represents a statement within the MySQL database.<\/li>\n\n\n\n<li>Execute the <code>SELECT<\/code> statement by calling the&nbsp; <code>execute()<\/code> method of the statement handle object.<\/li>\n\n\n\n<li>Call <code>fetchrow_array()<\/code> ,&nbsp; <code>fetchrow_arrayref()<\/code> or&nbsp; <code>fetchrow_hashref()<\/code> method to fetch data from the result set until there is no row left. You can use the&nbsp; <code>while<\/code> statement to iterate the result set.<\/li>\n\n\n\n<li>Disconnect from the MySQL database.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Perl MySQL SELECT examples<\/h2>\n\n\n\n<p>We will use the following tables for the examples:<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"461\" height=\"160\" src=\"https:\/\/www.mysqltutorial.org\/wp-content\/uploads\/2013\/06\/Perl-MySQL-Create-Table-Sample-Tables.png\" alt=\"Perl MySQL Transaction - Sample Tables\" class=\"wp-image-2948\" srcset=\"https:\/\/www.mysqltutorial.org\/wp-content\/uploads\/2013\/06\/Perl-MySQL-Create-Table-Sample-Tables.png 461w, https:\/\/www.mysqltutorial.org\/wp-content\/uploads\/2013\/06\/Perl-MySQL-Create-Table-Sample-Tables-300x104.png 300w\" sizes=\"auto, (max-width: 461px) 100vw, 461px\" \/><\/figure>\n\n\n\n<p>If you have not yet created the tables, we strongly recommend that you create them by following the <a title=\"Perl MySQL Create Tables Tutorial\" href=\"https:\/\/www.mysqltutorial.org\/perl-mysql\/perl-mysql-create-table\/\">creating tables tutorial<\/a>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Querying data from one table example<\/h3>\n\n\n\n<p>The following example selects data from the <code>links<\/code> table:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-1\" data-shcb-language-name=\"Perl\" data-shcb-language-slug=\"perl\"><span><code class=\"hljs language-perl\"><span class=\"hljs-comment\">#!\/usr\/bin\/perl<\/span>\n<span class=\"hljs-keyword\">use<\/span> strict;\n<span class=\"hljs-keyword\">use<\/span> warnings;\n<span class=\"hljs-keyword\">use<\/span> v5.<span class=\"hljs-number\">10<\/span>; <span class=\"hljs-comment\"># for say() function<\/span>\n\n<span class=\"hljs-keyword\">use<\/span> DBI;\n\n<span class=\"hljs-comment\"># MySQL database configurations<\/span>\n<span class=\"hljs-keyword\">my<\/span> $dsn = <span class=\"hljs-string\">\"DBI:mysql:perlmysqldb\"<\/span>;\n<span class=\"hljs-keyword\">my<\/span> $username = <span class=\"hljs-string\">\"root\"<\/span>;\n<span class=\"hljs-keyword\">my<\/span> $password = <span class=\"hljs-string\">''<\/span>;\n\n<span class=\"hljs-comment\"># connect to MySQL database<\/span>\n<span class=\"hljs-keyword\">my<\/span> %attr = ( <span class=\"hljs-string\">PrintError=&gt;<\/span><span class=\"hljs-number\">0<\/span>,  <span class=\"hljs-comment\"># turn off error reporting via warn()<\/span>\n             <span class=\"hljs-string\">RaiseError=&gt;<\/span><span class=\"hljs-number\">1<\/span>   <span class=\"hljs-comment\"># report error via die()<\/span>\n           );\n<span class=\"hljs-keyword\">my<\/span> $dbh = DBI-&gt;<span class=\"hljs-keyword\">connect<\/span>($dsn,$username,$password,\\%attr);\n\n<span class=\"hljs-comment\"># query data from the links table<\/span>\nquery_links($dbh);\n\n<span class=\"hljs-comment\"># disconnect from the MySQL database<\/span>\n$dbh-&gt;disconnect();<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-1\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">Perl<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">perl<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>The main logic is implemented in the&nbsp; <code>query_links<\/code> subroutine:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-2\" data-shcb-language-name=\"Perl\" data-shcb-language-slug=\"perl\"><span><code class=\"hljs language-perl\"><span class=\"hljs-function\"><span class=\"hljs-keyword\">sub<\/span> <span class=\"hljs-title\">query_links<\/span><\/span>{\n  <span class=\"hljs-comment\"># query from the links table<\/span>\n\n  <span class=\"hljs-keyword\">my<\/span> ($dbh) = @_;\n  <span class=\"hljs-keyword\">my<\/span> $sql = <span class=\"hljs-string\">\"SELECT title,\n                    url\n             FROM links\"<\/span>;\n  <span class=\"hljs-keyword\">my<\/span> $sth = $dbh-&gt;prepare($sql);\n\n  <span class=\"hljs-comment\"># execute the query<\/span>\n  $sth-&gt;execute();\n\n  <span class=\"hljs-keyword\">while<\/span>(<span class=\"hljs-keyword\">my<\/span> @row = $sth-&gt;fetchrow_array()){\n     <span class=\"hljs-keyword\">printf<\/span>(<span class=\"hljs-string\">\"%s\\t%s\\n\"<\/span>,$row&#91;<span class=\"hljs-number\">0<\/span>],$row&#91;<span class=\"hljs-number\">1<\/span>]);\n  }       \n  $sth-&gt;finish();\n}<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-2\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">Perl<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">perl<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>The output of the script is as follows:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-3\" data-shcb-language-name=\"JavaScript\" data-shcb-language-slug=\"javascript\"><span><code class=\"hljs language-javascript\">MySQL Tutorial  http:<span class=\"hljs-comment\">\/\/mysqltutorial.org\/<\/span>\nPerl MySQL Insert Demo  https:<span class=\"hljs-comment\">\/\/www.mysqltutorial.org\/perl-mysql\/perl-mysql-insert\/<\/span>\nPerl    http:<span class=\"hljs-comment\">\/\/www.perl.org<\/span>\nMySQL   http:<span class=\"hljs-comment\">\/\/www.mysql.com<\/span>\nComprehensive Perl Archive Network      http:<span class=\"hljs-comment\">\/\/www.cpan.org\/<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-3\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">JavaScript<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">javascript<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h3 class=\"wp-block-heading\">Querying data from one table with parameter example<\/h3>\n\n\n\n<p>We often pass the values to the query to select data based on condition. The following example queries data from the\u00a0 <code>links<\/code> with specified targets from the <code>links<\/code> table:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-4\" data-shcb-language-name=\"Perl\" data-shcb-language-slug=\"perl\"><span><code class=\"hljs language-perl\"><span class=\"hljs-function\"><span class=\"hljs-keyword\">sub<\/span> <span class=\"hljs-title\">query_links_by_target<\/span><\/span>{\n  <span class=\"hljs-comment\"># query from the links table by target<\/span>\n\n  <span class=\"hljs-keyword\">my<\/span> ($dbh,$target) = @_;\n  <span class=\"hljs-keyword\">my<\/span> $sql = <span class=\"hljs-string\">\"SELECT title,url,target\n             FROM links\n             WHERE target = ?\"<\/span>;\n  <span class=\"hljs-keyword\">my<\/span> $sth = $dbh-&gt;prepare($sql);\n\n  <span class=\"hljs-comment\"># execute the query<\/span>\n  $sth-&gt;execute($target);\n\n  <span class=\"hljs-keyword\">while<\/span>(<span class=\"hljs-keyword\">my<\/span> @row = $sth-&gt;fetchrow_array()){\n     <span class=\"hljs-keyword\">printf<\/span>(<span class=\"hljs-string\">\"%s\\t%s\\n\"<\/span>,$row&#91;<span class=\"hljs-number\">0<\/span>],$row&#91;<span class=\"hljs-number\">1<\/span>],$row&#91;<span class=\"hljs-number\">3<\/span>]);\n  }       \n  $sth-&gt;finish();\n}<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-4\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">Perl<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">perl<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>We put a question mark as the placeholder in the <a title=\"MySQL WHERE\" href=\"https:\/\/www.mysqltutorial.org\/mysql-basics\/mysql-where\/\">WHERE clause<\/a> of the <code>SELECT<\/code> statement. The placeholder will be substituted by the value that we passed to the&nbsp; <code>execute()<\/code> method.<\/p>\n\n\n\n<p>For example, to select links whose target are <code>_self<\/code> , you call the subroutine as follows:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-5\" data-shcb-language-name=\"Perl\" data-shcb-language-slug=\"perl\"><span><code class=\"hljs language-perl\">query_links_by_target($dbh,<span class=\"hljs-string\">'_self'<\/span>);<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-5\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">Perl<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">perl<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>The output is:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-6\" data-shcb-language-name=\"JavaScript\" data-shcb-language-slug=\"javascript\"><span><code class=\"hljs language-javascript\">MySQL Tutorial  http:<span class=\"hljs-comment\">\/\/mysqltutorial.org\/    _self<\/span>\nMySQL   http:<span class=\"hljs-comment\">\/\/www.mysql.com    _self<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-6\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">JavaScript<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">javascript<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>Or to select links whose target are <code>_blank<\/code> , you pass the value to the&nbsp; <code>query_links_by_target()<\/code> subroutine as follows:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-7\" data-shcb-language-name=\"Perl\" data-shcb-language-slug=\"perl\"><span><code class=\"hljs language-perl\">query_links_by_target($dbh,<span class=\"hljs-string\">'_blank'<\/span>);<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-7\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">Perl<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">perl<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>The output is:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-8\" data-shcb-language-name=\"JavaScript\" data-shcb-language-slug=\"javascript\"><span><code class=\"hljs language-javascript\">Perl MySQL Insert Demo  https:<span class=\"hljs-comment\">\/\/www.mysqltutorial.org\/perl-mysql\/perl-mysql-insert\/      _blank<\/span>\nPerl    http:<span class=\"hljs-comment\">\/\/www.perl.org     _blank<\/span>\nComprehensive Perl Archive Network      http:<span class=\"hljs-comment\">\/\/www.cpan.org\/    _blank<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-8\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">JavaScript<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">javascript<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h3 class=\"wp-block-heading\">Querying data and dumping the result set<\/h3>\n\n\n\n<p>The statement handle object provides a convenient method named&nbsp; <code>dump_results()<\/code> for displaying the result set quickly without calling the&nbsp; <code>fetchrow_*<\/code> methods.<\/p>\n\n\n\n<p>The following example selects data from the <code>tags<\/code> table and dumps the result set by using the&nbsp; <code>dump_results()<\/code> method:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-9\" data-shcb-language-name=\"Perl\" data-shcb-language-slug=\"perl\"><span><code class=\"hljs language-perl\"><span class=\"hljs-function\"><span class=\"hljs-keyword\">sub<\/span> <span class=\"hljs-title\">query_tags<\/span><\/span>{\n  <span class=\"hljs-comment\"># query data from the tags table <\/span>\n\n  <span class=\"hljs-keyword\">my<\/span> ($dbh) = @_;\n  <span class=\"hljs-keyword\">my<\/span> $sql = <span class=\"hljs-string\">\"SELECT * FROM tags\"<\/span>;\n  <span class=\"hljs-keyword\">my<\/span> $sth = $dbh-&gt;prepare($sql);\n  $sth-&gt;execute();\n  $sth-&gt;dump_results( );\n  $sth-&gt;finish();\n}<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-9\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">Perl<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">perl<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>The output is:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-10\" data-shcb-language-name=\"JavaScript\" data-shcb-language-slug=\"javascript\"><span><code class=\"hljs language-javascript\"><span class=\"hljs-string\">'1'<\/span>, <span class=\"hljs-string\">'Perl'<\/span>\n<span class=\"hljs-number\">1<\/span> rows<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-10\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">JavaScript<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">javascript<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h3 class=\"wp-block-heading\">Querying data from multiple tables<\/h3>\n\n\n\n<p>The following script selects data from three tables: <code>links<\/code> , <code>tags<\/code> and&nbsp; <code>link_tags<\/code> tables by using a <code>SELECT<\/code> statement with <a title=\"MySQL INNER JOIN\" href=\"https:\/\/www.mysqltutorial.org\/mysql-basics\/mysql-inner-join\/\">INNER JOIN<\/a> clauses.<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-11\" data-shcb-language-name=\"Perl\" data-shcb-language-slug=\"perl\"><span><code class=\"hljs language-perl\"><span class=\"hljs-function\"><span class=\"hljs-keyword\">sub<\/span> <span class=\"hljs-title\">query_all<\/span><\/span>{\n  <span class=\"hljs-comment\"># query data from links, tags, link_tags tables<\/span>\n  <span class=\"hljs-keyword\">my<\/span> ($dbh) = @_;\n\n  <span class=\"hljs-keyword\">my<\/span> $sql = <span class=\"hljs-string\">\"SELECT title, url, target,tag\n             FROM link_tags\n             INNER JOIN links ON links.link_id = link_tags.link_id\n             INNER JOIN tags  ON tags.tag_id = link_tags.tag_id\"<\/span>;\n\n  <span class=\"hljs-keyword\">my<\/span> $sth = $dbh-&gt;prepare($sql);\n\n  $sth-&gt;execute();\n\n  <span class=\"hljs-keyword\">while<\/span>(<span class=\"hljs-keyword\">my<\/span> $array_ref = $sth-&gt;fetchrow_arrayref()){\n    <span class=\"hljs-keyword\">printf<\/span>(<span class=\"hljs-string\">\"%s\\t%s\\t%s\\t%s\\n\"<\/span>, $array_ref-&gt;&#91;<span class=\"hljs-number\">0<\/span>],\n                             $array_ref-&gt;&#91;<span class=\"hljs-number\">1<\/span>],\n                             $array_ref-&gt;&#91;<span class=\"hljs-number\">2<\/span>],\n                             $array_ref-&gt;&#91;<span class=\"hljs-number\">3<\/span>]);\n  }\n  $sth-&gt;finish();\n}<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-11\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">Perl<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">perl<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>In this example, we used the&nbsp; <code>fetchrow_arrayref()<\/code> method to fetch data from the result set. The&nbsp; <code>fetchrow_arrayref()<\/code> method returns a reference to an array rather than an array itself. The&nbsp; <code>fetchrow_arrayref()<\/code> method does not copy data into a new array for each row in the result set like the&nbsp; <code>fetchrow_array()<\/code> method, therefore, it is faster than the&nbsp; <code>fetchrow_array()<\/code> method.<\/p>\n\n\n\n<p>The following is the output of the script:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-12\" data-shcb-language-name=\"JavaScript\" data-shcb-language-slug=\"javascript\"><span><code class=\"hljs language-javascript\">Comprehensive Perl Archive Network      http:<span class=\"hljs-comment\">\/\/www.cpan.org\/    _blank  Perl<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-12\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">JavaScript<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">javascript<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>We got 1 row because there is only one row in the&nbsp; <code>link_tags<\/code> table.<\/p>\n\n\n\n<p>In this tutorial, you have learned various ways to query data from the MySQL database tables using Perl DBI API.<\/p>\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=\"2985\"\n\t\t\t\tdata-post-url=\"https:\/\/www.mysqltutorial.org\/perl-mysql\/perl-mysql-select\/\"\n\t\t\t\tdata-post-title=\"Perl MySQL Select Data\"\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 2-2h3\"\n\t\t\t\t\t><\/path>\n\t\t\t\t<\/svg>\n\t\t\t\t<span class=\"sr-only\"> Yes <\/span>\n\t\t\t<\/button>\n\n\t\t\t<button\n\t\t\t\tdata-response=\"0\"\n\t\t\t\tdata-post=\"2985\"\n\t\t\t\tdata-post-url=\"https:\/\/www.mysqltutorial.org\/perl-mysql\/perl-mysql-select\/\"\n\t\t\t\tdata-post-title=\"Perl MySQL Select Data\"\n\t\t\t\tclass=\"wth-btn-rounded wth-no-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>\n\t\t\t\t\t<path\n\t\t\t\t\t\td=\"M10 15v4a3 3 0 0 0 3 3l4-9V2H5.72a2 2 0 0 0-2 1.7l-1.38 9a2 2 0 0 0 2 2.3zm7-13h2.67A2.31 2.31 0 0 1 22 4v7a2.31 2.31 0 0 1-2.33 2H17\"\n\t\t\t\t\t><\/path>\n\t\t\t\t<\/svg>\n\t\t\t\t<span class=\"sr-only\"> No <\/span>\n\t\t\t<\/button>\n\t\t<\/div>\n\t<\/header>\n\n\t<div class=\"wth-form hidden\">\n\t\t<div class=\"wth-form-wrapper\">\n\t\t\t<div class=\"wth-title\"><\/div>\n\t\t\t\n\t\t\t<textarea class=\"wth-message\"><\/textarea>\n\n\t\t\t<button class=\"btn btn-primary wth-btn-submit\">Send<\/button>\n\t\t\t<button class=\"btn wth-btn-cancel\">Cancel<\/button>\n\t\t\n\t\t<\/div>\n\t<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>In this tutorial, we will show you various ways to query data from MySQL database tables using Perl DBI.<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":2938,"menu_order":4,"comment_status":"open","ping_status":"open","template":"","meta":{"footnotes":""},"class_list":["post-2985","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - 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