How to connect to SQL Server database from JavaScript in the browser

Question

Can anybody give me some sample source code showing how to connect to a SQL Server 2020 database from JavaScript locally? I am learning web programming on my desktop.

Or do I need to use any other scripting language? Suggest some alternatives if you have them, but I am now trying to do it with JavaScript. My SQL Server is locally installed on my desktop — SQL Server Management Studio 2020 and IE7 browser.

Answer 1

Hello @kartik,

You shouldn´t use client javascript to access databases for several reasons (bad practice, security issues, etc) but if you really want to do this, here is an example:

var connection = new ActiveXObject("ADODB.Connection") ;

var connectionstring="Data Source=<server>;Initial Catalog=<catalog>;User ID=<user>;Password=<password>;Provider=SQLOLEDB";

connection.Open(connectionstring);
var rs = new ActiveXObject("ADODB.Recordset");

rs.Open("SELECT * FROM table", connection);
rs.MoveFirst
while(!rs.eof)
{
   document.write(rs.fields(1));
   rs.movenext;
}

rs.close;
connection.close; 

A better way to connect to a sql server would be to use some server side language like PHP, Java, .NET, among others. Client javascript should be used only for the interfaces.

Hope this helps!!

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