{"id":3939,"date":"2024-07-15T17:27:07","date_gmt":"2024-07-15T10:27:07","guid":{"rendered":"https:\/\/www.sqlservertutorial.net\/?page_id=3939"},"modified":"2024-07-22T07:51:32","modified_gmt":"2024-07-22T00:51:32","slug":"nodejs-sql-server-select","status":"publish","type":"page","link":"https:\/\/www.sqlservertutorial.net\/nodejs-sql-server\/nodejs-sql-server-select\/","title":{"rendered":"Node.js SQL Server: Select"},"content":{"rendered":"\n<p><strong>Summary<\/strong>: in this tutorial, you will learn how to use query data from the SQL Server in Node.js.<\/p>\n\n\n\n<p class=\"note\">This tutorial begins where\u00a0the <a href=\"https:\/\/www.sqlservertutorial.net\/nodejs-sql-server\/nodejs-sql-server-update\/\">Updating data from the Node.js tutorial<\/a>\u00a0left off.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id='selecting-a-single-row'>Selecting a single row <a href=\"#selecting-a-single-row\" class=\"anchor\" id=\"selecting-a-single-row\" title=\"Anchor for Selecting a single row\">#<\/a><\/h2>\n\n\n\n<p>Step 1. Create a new file in the project directory called <code>select.js<\/code><\/p>\n\n\n\n<p>Step 2. Define a new function that finds the author by id:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-1\" data-shcb-language-name=\"JavaScript\" data-shcb-language-slug=\"javascript\"><span><code class=\"hljs language-javascript\"><span class=\"hljs-keyword\">import<\/span> sql <span class=\"hljs-keyword\">from<\/span> <span class=\"hljs-string\">'mssql'<\/span>;\n<span class=\"hljs-keyword\">import<\/span> { config } <span class=\"hljs-keyword\">from<\/span> <span class=\"hljs-string\">'.\/config.js'<\/span>;\n\n<span class=\"hljs-keyword\">const<\/span> findAuthorById = <span class=\"hljs-keyword\">async<\/span> (id) =&gt; {\n  <span class=\"hljs-keyword\">try<\/span> {\n    <span class=\"hljs-comment\">\/\/ Connect to the database<\/span>\n    <span class=\"hljs-keyword\">const<\/span> pool = <span class=\"hljs-keyword\">await<\/span> sql.connect(config);\n\n    <span class=\"hljs-comment\">\/\/ Execute the query<\/span>\n    <span class=\"hljs-keyword\">const<\/span> result = <span class=\"hljs-keyword\">await<\/span> pool\n      .request()\n      .input(<span class=\"hljs-string\">'id'<\/span>, sql.Int, id)\n      .query(<span class=\"hljs-string\">`SELECT * FROM Authors WHERE AuthorID = @id`<\/span>);\n\n    <span class=\"hljs-comment\">\/\/ return the result<\/span>\n    <span class=\"hljs-keyword\">return<\/span> result.recordset.length &gt; <span class=\"hljs-number\">0<\/span> ? result.recordset&#91;<span class=\"hljs-number\">0<\/span>] : <span class=\"hljs-literal\">null<\/span>;\n  } <span class=\"hljs-keyword\">catch<\/span> (err) {\n    <span class=\"hljs-built_in\">console<\/span>.error(err);\n  }\n};<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-1\"><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>This <code>findAuthorById<\/code>  function does the following: <\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Connect to the database.<\/li>\n\n\n\n<li>Execute a query to find an author by ID using a parameterized query to prevent SQL injection.<\/li>\n\n\n\n<li>Return the author object if found.<\/li>\n<\/ul>\n\n\n\n<p>How it works.<\/p>\n\n\n\n<p>First, import <code>sql<\/code> object from <code>mssql<\/code> package and <code>config<\/code> object from the <code>config.js<\/code> module:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-2\" data-shcb-language-name=\"JavaScript\" data-shcb-language-slug=\"javascript\"><span><code class=\"hljs language-javascript\"><span class=\"hljs-keyword\">import<\/span> sql <span class=\"hljs-keyword\">from<\/span> <span class=\"hljs-string\">'mssql'<\/span>;\n<span class=\"hljs-keyword\">import<\/span> { config } <span class=\"hljs-keyword\">from<\/span> <span class=\"hljs-string\">'.\/config.js'<\/span>;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-2\"><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>The <code>mssql<\/code> package allows you to interact with the SQL Server. The <code>config<\/code> is an object that contains database parameters for the connection.<\/p>\n\n\n\n<p>Second, connect to the database using the provided configuration object:<\/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\"><span class=\"hljs-keyword\">const<\/span> pool = <span class=\"hljs-keyword\">await<\/span> sql.connect(config);<\/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<p>The <code>sql.connect()<\/code> function returns a <code>ConnectionPool<\/code> object which allows you to execute queries.<\/p>\n\n\n\n<p>Third, execute a query:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-4\" data-shcb-language-name=\"JavaScript\" data-shcb-language-slug=\"javascript\"><span><code class=\"hljs language-javascript\"><span class=\"hljs-keyword\">const<\/span> result = <span class=\"hljs-keyword\">await<\/span> pool\n  .request()\n  .input(<span class=\"hljs-string\">'id'<\/span>, sql.Int, id)\n  .query(<span class=\"hljs-string\">`SELECT * FROM Authors WHERE AuthorID = @id`<\/span>);<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-4\"><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>In this statement:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>pool.request()<\/code> creates a new <code>Request<\/code> instance representing a single query you want to execute against the database.<\/li>\n\n\n\n<li><code>.input(name, type, value)<\/code> defines input parameters for the query. In this case, it defines the id with the type <code>sql.Int<\/code> and the value is id.<\/li>\n\n\n\n<li><code>.query(<code>sqlQuery<\/code>)<\/code>executes the SQL query. In this case, it uses the input parameters defined earlier (<code>@id<\/code> is replaced with the value of the <code>id<\/code> parameter.<\/li>\n<\/ul>\n\n\n\n<p>Fourth, return the first record or null if no records were found:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-5\" data-shcb-language-name=\"JavaScript\" data-shcb-language-slug=\"javascript\"><span><code class=\"hljs language-javascript\"><span class=\"hljs-keyword\">return<\/span> result.recordset.length &gt; <span class=\"hljs-number\">0<\/span> ? result.recordset&#91;<span class=\"hljs-number\">0<\/span>] : <span class=\"hljs-literal\">null<\/span>;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-5\"><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>Step 3. Modify the <code>index.js<\/code> file to use the <code>findAuthorById<\/code> function:<\/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\"><span class=\"hljs-keyword\">import<\/span> { findAuthorById } <span class=\"hljs-keyword\">from<\/span> <span class=\"hljs-string\">'.\/select.js'<\/span>;\n\n<span class=\"hljs-keyword\">const<\/span> author = <span class=\"hljs-keyword\">await<\/span> findAuthorById(<span class=\"hljs-number\">1<\/span>);\n<span class=\"hljs-built_in\">console<\/span>.log(author);<\/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>How it works.<\/p>\n\n\n\n<p>First, import the function <code>findAuthorById<\/code>  from the <code>select.js<\/code> module:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-7\" data-shcb-language-name=\"JavaScript\" data-shcb-language-slug=\"javascript\"><span><code class=\"hljs language-javascript\"><span class=\"hljs-keyword\">import<\/span> { findAuthorById } <span class=\"hljs-keyword\">from<\/span> <span class=\"hljs-string\">'.\/select.js'<\/span>;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-7\"><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>Second, call the <code>findAuthorById<\/code> function to find the author with id 1:<\/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\"><span class=\"hljs-keyword\">const<\/span> author = <span class=\"hljs-keyword\">await<\/span> findAuthorById(<span class=\"hljs-number\">1<\/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<p>Third, display the author:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-9\" data-shcb-language-name=\"JavaScript\" data-shcb-language-slug=\"javascript\"><span><code class=\"hljs language-javascript\"><span class=\"hljs-built_in\">console<\/span>.log(author);<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-9\"><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>Step 4. Run the <code>index.js<\/code> file:<\/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\">npm start<\/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<p>Output:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-11\" data-shcb-language-name=\"JavaScript\" data-shcb-language-slug=\"javascript\"><span><code class=\"hljs language-javascript\">{\n  <span class=\"hljs-attr\">AuthorID<\/span>: <span class=\"hljs-number\">1<\/span>,\n  <span class=\"hljs-attr\">FirstName<\/span>: <span class=\"hljs-string\">'George'<\/span>,\n  <span class=\"hljs-attr\">LastName<\/span>: <span class=\"hljs-string\">'Orwell'<\/span>,\n  <span class=\"hljs-attr\">BirthDate<\/span>: <span class=\"hljs-number\">1903<\/span><span class=\"hljs-number\">-06<\/span><span class=\"hljs-number\">-25<\/span>T00:<span class=\"hljs-number\">00<\/span>:<span class=\"hljs-number\">00.000<\/span>Z\n}<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-11\"><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\" id='selecting-multiple-rows'>Selecting multiple rows <a href=\"#selecting-multiple-rows\" class=\"anchor\" id=\"selecting-multiple-rows\" title=\"Anchor for Selecting multiple rows\">#<\/a><\/h3>\n\n\n\n<p>We&#8217;ll find the authors by their last names using the <code><a href=\"https:\/\/www.sqlservertutorial.net\/sql-server-basics\/sql-server-like\/\">LIKE<\/a><\/code> operator.<\/p>\n\n\n\n<p>Step 1. Modify the <code>select.js<\/code> file by adding the <code>findAuthorsByLastName<\/code> function:<\/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\"><span class=\"hljs-keyword\">async<\/span> <span class=\"hljs-function\"><span class=\"hljs-keyword\">function<\/span> <span class=\"hljs-title\">findAuthorsByLastName<\/span>(<span class=\"hljs-params\">term<\/span>) <\/span>{\n  <span class=\"hljs-keyword\">try<\/span> {\n    <span class=\"hljs-comment\">\/\/ Connect to the database<\/span>\n    <span class=\"hljs-keyword\">const<\/span> pool = <span class=\"hljs-keyword\">await<\/span> sql.connect(config);\n\n    <span class=\"hljs-comment\">\/\/ Execute a query<\/span>\n    <span class=\"hljs-keyword\">const<\/span> result = <span class=\"hljs-keyword\">await<\/span> pool\n      .request()\n      .input(<span class=\"hljs-string\">'term'<\/span>, sql.VarChar, <span class=\"hljs-string\">`%<span class=\"hljs-subst\">${term}<\/span>%`<\/span>)\n      .query(<span class=\"hljs-string\">`SELECT * FROM Authors WHERE LastName LIKE @term`<\/span>);\n\n    <span class=\"hljs-keyword\">return<\/span> result.recordset;\n  } <span class=\"hljs-keyword\">catch<\/span> (err) {\n    <span class=\"hljs-built_in\">console<\/span>.error(<span class=\"hljs-string\">'Error finding authors by last name:'<\/span>, err);\n  }\n}<\/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>How it works.<\/p>\n\n\n\n<p>First, connect to the SQL Server:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-13\" data-shcb-language-name=\"JavaScript\" data-shcb-language-slug=\"javascript\"><span><code class=\"hljs language-javascript\"><span class=\"hljs-keyword\">const<\/span> pool = <span class=\"hljs-keyword\">await<\/span> sql.connect(config);<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-13\"><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>Second, find the authors whose last names contain the input term using the <code>LIKE<\/code> operator with the % wildcards:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-14\" data-shcb-language-name=\"JavaScript\" data-shcb-language-slug=\"javascript\"><span><code class=\"hljs language-javascript\"><span class=\"hljs-keyword\">const<\/span> result = <span class=\"hljs-keyword\">await<\/span> pool\n  .request()\n  .input(<span class=\"hljs-string\">'term'<\/span>, sql.VarChar, <span class=\"hljs-string\">`%<span class=\"hljs-subst\">${term}<\/span>%`<\/span>)\n  .query(<span class=\"hljs-string\">`SELECT * FROM Authors WHERE LastName LIKE @term`<\/span>);<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-14\"><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>Third, return the record set:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-15\" data-shcb-language-name=\"JavaScript\" data-shcb-language-slug=\"javascript\"><span><code class=\"hljs language-javascript\"><span class=\"hljs-keyword\">return<\/span> result.recordset;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-15\"><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>Step 2. Modify the <code>index.js<\/code> file to use the <code>findAuthorsByLastName()<\/code> function:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-16\" data-shcb-language-name=\"JavaScript\" data-shcb-language-slug=\"javascript\"><span><code class=\"hljs language-javascript\"><span class=\"hljs-keyword\">import<\/span> { findAuthorsByLastName } <span class=\"hljs-keyword\">from<\/span> <span class=\"hljs-string\">'.\/select.js'<\/span>;\n\n<span class=\"hljs-keyword\">const<\/span> authors = <span class=\"hljs-keyword\">await<\/span> findAuthorsByLastName(<span class=\"hljs-string\">'He'<\/span>);\n<span class=\"hljs-built_in\">console<\/span>.log(authors);<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-16\"><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>Step 3. Run the following command on the terminal to execute the <code>index.js<\/code> file:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-17\" data-shcb-language-name=\"JavaScript\" data-shcb-language-slug=\"javascript\"><span><code class=\"hljs language-javascript\">npm start<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-17\"><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>Output:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-18\" data-shcb-language-name=\"JavaScript\" data-shcb-language-slug=\"javascript\"><span><code class=\"hljs language-javascript\">&#91;\n  {\n    <span class=\"hljs-attr\">AuthorID<\/span>: <span class=\"hljs-number\">11<\/span>,\n    <span class=\"hljs-attr\">FirstName<\/span>: <span class=\"hljs-string\">'Ernest'<\/span>,\n    <span class=\"hljs-attr\">LastName<\/span>: <span class=\"hljs-string\">'Hemingway'<\/span>,\n    <span class=\"hljs-attr\">BirthDate<\/span>: <span class=\"hljs-number\">1899<\/span><span class=\"hljs-number\">-07<\/span><span class=\"hljs-number\">-21<\/span>T00:<span class=\"hljs-number\">00<\/span>:<span class=\"hljs-number\">00.000<\/span>Z\n  },\n  {\n    <span class=\"hljs-attr\">AuthorID<\/span>: <span class=\"hljs-number\">20<\/span>,\n    <span class=\"hljs-attr\">FirstName<\/span>: <span class=\"hljs-string\">'Mary'<\/span>,\n    <span class=\"hljs-attr\">LastName<\/span>: <span class=\"hljs-string\">'Shelley'<\/span>,\n    <span class=\"hljs-attr\">BirthDate<\/span>: <span class=\"hljs-number\">1797<\/span><span class=\"hljs-number\">-08<\/span><span class=\"hljs-number\">-30<\/span>T00:<span class=\"hljs-number\">00<\/span>:<span class=\"hljs-number\">00.000<\/span>Z\n  }\n]<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-18\"><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<h2 class=\"wp-block-heading\" id='download-the-project-source-code'>Download the project source code <a href=\"#download-the-project-source-code\" class=\"anchor\" id=\"download-the-project-source-code\" title=\"Anchor for Download the project source code\">#<\/a><\/h2>\n\n\n\n<p><a href=\"https:\/\/www.sqlservertutorial.net\/wp-content\/uploads\/Node.js-SQL-Server-Select.zip\">Download the project source code<\/a><\/p>\n\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>input()<\/code> method to parameterize the query to prevent SQL injections.<\/li>\n\n\n\n<li>Use the <code>query()<\/code> method to select one or more rows from the database.<\/li>\n<\/ul>\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=\"3939\"\n\t\t\t\tdata-post-url=\"https:\/\/www.sqlservertutorial.net\/nodejs-sql-server\/nodejs-sql-server-select\/\"\n\t\t\t\tdata-post-title=\"Node.js SQL Server: Select\"\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 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