If you really want a free alternative that is similar to MS SQL and supports growth should you need it, you could have a look at MySQL or PostgreSQL. SQLite also seems a good choice.Surely you can afford an old Linux server if you work in a company with 20 employees.
There are no management consoles for SQL Server Express installed by default (e.g. SSMS) so how can I determine the version? I checked from Control Panel -> Programs, and it says I got "Microsoft SQL Server 2017 LocalDB" and the version states "14.0.3223.3". So it means that the version is too old, and I need to follow the instructions here? -us/citrix-virtual-apps-desktops/upgrade-migrate/upgrade.html#replace-sql-server-express-localdb
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A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)
These extra five steps are something I can't remember ever having had to do in a previous version of SQL Server, Express or otherwise. They appear to have been necessary because I'm using a named instance (myservername\SQLEXPRESS) on the server instead of a default instance. See here:
I had never realized that the SQL Server Browser service actually assisted the SQL Server in making connections; I was under the impression that it simply helped populate the dropdowns when you clicked "browse for more" servers to connect to, but it actually helps align client requests with the correct port # to use, if the port # is not explicitly assigned (similar to how website bindings help alleviate the same issue on an IIS web server that hosts multiple websites).
If you are using SQL Server in a client-server scenario (for example,when your application is accessing SQL Server across a network), ifyou stop or disable the SQL Server Browser service, you must assign aspecific port number to each instance and write your clientapplication code to always use that port number. This approach has thefollowing problems:
Because only one instance of SQL Server can use a port or pipe,different port numbers and pipe names are assigned for namedinstances, including SQL Server Express. By default, whenenabled, both named instances and SQL Server Express are configured touse dynamic ports, that is, an available port is assigned when SQLServer starts. If you want, a specific port can be assigned to aninstance of SQL Server. When connecting, clients can specify aspecific port; but if the port is dynamically assigned, the portnumber can change anytime SQL Server is restarted, so the correct portnumber is unknown to the client. ... When SQL Server clients requestSQL Server resources, the client network library sends a UDP messageto the server using port 1434. SQL Server Browser responds with theTCP/IP port or named pipe of the requested instance. The networklibrary on the client application then completes the connection bysending a request to the server using the port or named pipe of thedesired instance
Well, god, it's actually really simple and maybe a bit foolish.When I tried to create a database and Visual Studio suggested the name of the SQL Server it gave me my Windows username and since it's actually the name of the server I went for it.
In my case the database was running on non standard port. Check that the port you are connecting is the same as the port the database is running on. If there are more instances of SQL server, check the correct one.
Node (or more formally Node.js) is an open-source, cross-platform runtime environment that allows developers to create all kinds of server-side tools and applications in JavaScript. The runtime is intended for use outside of a browser context (i.e. running directly on a computer or server OS). As such, the environment omits browser-specific JavaScript APIs and adds support for more traditional OS APIs including HTTP and file system libraries.
There isn't any readily-available and definitive measure of the popularity of server-side frameworks (although you can estimate popularity using mechanisms like counting the number of GitHub projects and StackOverflow questions for each platform). A better question is whether Node and Express are "popular enough" to avoid the problems of unpopular platforms. Are they continuing to evolve? Can you get help if you need it? Is there an opportunity for you to get paid work if you learn Express?
The first two lines require() (import) the express module and create an Express application. This object, which is traditionally named app, has methods for routing HTTP requests, configuring middleware, rendering HTML views, registering a template engine, and modifying application settings that control how the application behaves (e.g. the environment mode, whether route definitions are case sensitive, etc.)
The final block starts up the server on a specified port ('3000') and prints a log comment to the console. With the server running, you could go to localhost:3000 in your browser to see the example response returned.
The code below shows how we import a module by name, using the Express framework as an example. First we invoke the require() function, specifying the name of the module as a string ('express'), and calling the returned object to create an Express application. We can then access the properties and functions of the application object.
Using non-blocking asynchronous APIs is even more important on Node than in the browser because Node is a single-threaded event-driven execution environment. "Single threaded" means that all requests to the server are run on the same thread (rather than being spawned off into separate processes). This model is extremely efficient in terms of speed and server resources, but it does mean that if any of your functions call synchronous methods that take a long time to complete, they will block not just the current request, but every other request being handled by your web application.
Often it is useful to group route handlers for a particular part of a site together and access them using a common route-prefix (e.g. a site with a Wiki might have all wiki-related routes in one file and have them accessed with a route prefix of /wiki/). In Express this is achieved by using the express.Router object. For example, we can create our wiki route in a module named wiki.js, and then export the Router object, as shown below:
You can use the express.static middleware to serve static files, including your images, CSS and JavaScript (static() is the only middleware function that is actually part of Express). For example, you would use the line below to serve images, CSS files, and JavaScript files from a directory named 'public' at the same level as where you call node:
The database itself can be installed locally or on a cloud server. In your Express code you require the driver, connect to the database, and then perform create, read, update, and delete (CRUD) operations. The example below (from the Express documentation) shows how you can find "mammal" records using MongoDB.
\n Node (or more formally Node.js) is an open-source, cross-platform runtime environment that allows developers to create all kinds of server-side tools and applications in JavaScript.\n The runtime is intended for use outside of a browser context (i.e. running directly on a computer or server OS). As such, the environment omits browser-specific JavaScript APIs and adds support for more traditional OS APIs including HTTP and file system libraries.\n
There isn't any readily-available and definitive measure of the popularity of server-side frameworks (although you can estimate popularity using mechanisms like counting the number of GitHub projects and StackOverflow questions for each platform). A better question is whether Node and Express are \"popular enough\" to avoid the problems of unpopular platforms. Are they continuing to evolve? Can you get help if you need it? Is there an opportunity for you to get paid work if you learn Express?
Using non-blocking asynchronous APIs is even more important on Node than in the browser because Node is a single-threaded event-driven execution environment. \"Single threaded\" means that all requests to the server are run on the same thread (rather than being spawned off into separate processes). This model is extremely efficient in terms of speed and server resources, but it does mean that if any of your functions call synchronous methods that take a long time to complete, they will block not just the current request, but every other request being handled by your web application. 2351a5e196
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