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Create Azure Functions with the SQL bindings extension for Visual Studio Code

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Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance Azure Synapse Analytics

Azure Functions support for SQL bindings is available in preview for input and output bindings, making connecting to an Azure SQL database or SQL Server database to Azure Functions easier. The SQL bindings extension for Visual Studio Code (VS Code) facilitates the process of developing Azure Functions with SQL bindings and is automatically installed with the mssql extension for VS Code extension pack. This article shows how the SQL bindings extension for Visual Studio Code can be used to create Azure Functions with SQL bindings.

Note

Currently, the SQL bindings extension only supports C# Azure Functions. JavaScript and Python Azure Functions support SQL bindings but are not supported by the SQL bindings extension at this time.

From the Object Explorer

To create an Azure Function from a specific Table or View in object explorer (OE), right-click on a table or view from a connected server in SQL Server object explorer and select Create Azure Function with SQL Binding.

Table OE Command: Screenshot of object explorer context menu to add a SQL binding from Table.

View OE Command: Screenshot of object explorer context menu to add a SQL binding from View.

See further documentation to create an Azure function with SQL bindings from the SQL Server object explorer here.

From the Command Palette

Run the MS SQL: Create Azure Function with SQL Binding command from the command palette to create a new function with a SQL binding.

VS Code command palette command `MS SQL: Create Azure Function with SQL Binding (preview).

See further documentation to create an Azure function with SQL bindings from the command palette here.

In an existing Azure Function

Open the C# Azure Function in an editor and then run the MS SQL: Add SQL Binding command from the command palette to add a SQL binding to an existing function.

VS Code command palette command `MS SQL: Add SQL Binding (preview).

See further documentation here.

Generated Code for Azure Functions with SQL Bindings

The code generated for the Azure function with SQL Input Binding:

using System;
using System.Collections.Generic;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Azure.WebJobs;
using Microsoft.Azure.WebJobs.Extensions.Http;
using Microsoft.Extensions.Logging;

namespace Company.Function
{
    public static class dboEmployees
    {
        // Visit https://aka.ms/sqlbindingsinput to learn how to use this input binding
    [FunctionName("dboEmployees")]
        public static IActionResult Run(
            [HttpTrigger(AuthorizationLevel.Function, "get", Route = null)] HttpRequest req,
            [Sql("SELECT * FROM [dbo].[Employees]",
            CommandType = System.Data.CommandType.Text,
            ConnectionStringSetting = "SqlConnectionString")] IEnumerable<Object> result,
            ILogger log)
        {
            log.LogInformation("C# HTTP trigger with SQL Input Binding function processed a request.");

            return new OkObjectResult(result);
        }
    }
}

The code generated for the Azure function with SQL Output Binding:

using System;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Azure.WebJobs;
using Microsoft.Azure.WebJobs.Extensions.Http;
using Microsoft.Extensions.Logging;

namespace Company.Function
{
    public static class dboEmployees
    {
        // Visit [https://aka.ms/sqlbindingsoutput] to learn how to use this output binding
        [FunctionName("dboEmployees")]
        public static CreatedResult Run(
            [HttpTrigger(AuthorizationLevel.Function, "get", Route = "addtodoitem")] HttpRequest req,
            [Sql("[dbo].[Test2]", ConnectionStringSetting = "NewSQLConnectionString")] out ToDoItem output,
            ILogger log)
        {
            log.LogInformation("C# HTTP trigger with SQL Output Binding function processed a request.");

            output = new ToDoItem
            {
                Id = "1",
                Priority = 1,
                Description = "Hello World"
            };

            return new CreatedResult($"/api/addtodoitem", output);
        }
    }

    public class ToDoItem
    {
        public string Id { get; set; }
        public int Priority { get; set; }
        public string Description { get; set; }
    }
}

Next steps