Kerberos is a widely accepted network authentication protocol that is used to provide a highly secure method to authenticate users. Reliance is placed upon. Walkthrough Accessing a SQL Database by Using Type Providers FNote. This guide was written for F 3. See FSharp. Data for up to date, cross platform type providers. Note. The API reference links will take you to MSDN. The docs. microsoft. API reference is not complete. Cannot Generate Sspi Context Using Windows Authentication For Sql' title='Cannot Generate Sspi Context Using Windows Authentication For Sql' />This walkthrough explains how to use the Sql. Data. Connection LINQ to SQL type provider that is available in F 3. SQL database when you have a live connection to a database. If you do not have a live connection to a database, but you do have a LINQ to SQL schema file DBML file, see Walkthrough Generating F Types from a DBML File. This walkthrough illustrates the following tasks. These tasks must be performed in this order for the walkthrough to succeed Preparing a test database. Cannot Generate Sspi Context Using Windows Authentication For Sql' title='Cannot Generate Sspi Context Using Windows Authentication For Sql' />Fixing error Cannot generate SSPI context after changing SQL service account 17 October 2013 Comments Posted in SQL Server, Windows. Everyone knows that it is good. Learn about 2 common scenarios for SQL Server login failures and what you can do about them. I am struggling to get a SQL Server connection from machine A to machine B which is running the SQL Server. I have Googled extensively and all the things I have found. Creating the project. Setting up a type provider. Querying the data. Working with nullable fields. Calling a stored procedure. Updating the database. Executing Transact SQL code. Using the full data context. Deleting data. Create a test database as neededPreparing a Test Database. On a server thats running SQL Server, create a database for testing purposes. You can use the database create script at the bottom of this page in the section Creating a test database to do this. To prepare a test database. To run the My. Database Create Script, open the View menu, and then choose SQL Server Object Explorer or choose the Ctrl, CtrlS keys. In SQL Server Object Explorer window, open the shortcut menu for the appropriate instance, choose New Query, copy the script at the bottom of this page, and then paste the script into the editor. Download Anime To Love Ru Episode 1 Sub Indo Moon more. To run the SQL script, choose the toolbar icon with the triangular symbol, or choose the CtrlQ keys. For more information about SQL Server Object Explorer, see Connected Database Development. Creating the project. Next, you create an F application project. To create and set up the project. Create a new F Application project. Add references to FSharp. Data. Type. Providers, as well as System. Data, and System. Data. Linq. Open the appropriate namespaces by adding the following lines of code to the top of your F code file Program. System. open System. Data. open System. Data. Linq. open Microsoft. FSharp. Data. Type. Providers. open Microsoft. FSharp. Linq. As with most F programs, you can execute the code in this walkthrough as a compiled program, or you can run it interactively as a script. If you prefer to use scripts, open the shortcut menu for the project node, select Add New Item, add an F script file, and add the code in each step to the script. You will need to add the following lines at the top of the file to load the assembly references. System. Data. dll. FSharp. Data. Type. Providers. System. Data. Linq. You can then select each block of code as you add it and press AltEnter to run it in F Interactive. Setting up a type provider. In this step, you create a type provider for your database schema. To set up the type provider from a direct database connection. There are two critical lines of code that you need in order to create the types that you can use to query a SQL database using the type provider. First, you instantiate the type provider. To do this, create what looks like a type abbreviation for a Sql. Data. Connection with a static generic parameter. Sql. Data. Connection is a SQL type provider, and should not be confused with Sql. Connection type that is used in ADO. NET programming. If you have a database that you want to connect to, and have a connection string, use the following code to invoke the type provider. Substitute your own connection string for the example string given. For example, if your server is MYSERVER and the database instance is INSTANCE, the database name is My. Database, and you want to use Windows Authentication to access the database, then the connection string would be as given in the following example code. Schema Sql. Data. Connectionlt Data SourceMYSERVERINSTANCE Initial CatalogMy. Database Integrated SecuritySSPI. Schema. Get. Data. Context. Enable the logging of database activity to the console. Data. Context. Log lt System. Console. Out. Now you have a type, db. Schema, which is a parent type that contains all the generated types that represent database tables. You also have an object, db, which has as its members all the tables in the database. The table names are properties, and the type of these properties is generated by the F compiler. The types themselves appear as nested types under db. Schema. Service. Types. Therefore, any data retrieved for rows of these tables is an instance of the appropriate type that was generated for that table. The name of the type is Service. Types. Table. 1. To familiarize yourself with how the F language interprets queries into SQL queries, review the line that sets the Log property on the data context. To further explore the types created by the type provider, add the following code. Table. 1. Hover over table. Its type is System. Data. Linq. Tablelt db. Schema. Service. Types. Table. 1 and the generic argument implies that the type of each row is the generated type, db. Schema. Service. Types. Table. 1. The compiler creates a similar type for each table in the database. Querying the data. In this step, you write a query using F query expressions. To query the data. Now create a query for that table in the database. Add the following code. Table. 1 do. select row. Seq. iter fun row printfn s d row. Name row. Test. Data. The appearance of the word query indicates that this is a query expression, a type of computation expression that generates a collection of results similar of a typical database query. If you hover over query, you will see that it is an instance of Linq. Query. Builder Class, a type that defines the query computation expression. If you hover over query. System. Linq. IQueryable. As the name suggests, System. Linq. IQueryable represents data that may be queried, not the result of a query. A query is subject to lazy evaluation, which means that the database is only queried when the query is evaluated. The final line passes the query through Seq. Queries are enumerable and may be iterated like sequences. For more information, see Query Expressions. Now add a query operator to the query. There are a number of query operators available that you can use to construct more complex queries. This example also shows that you can eliminate the query variable and use a pipeline operator instead. Table. 1 do. where row. Test. Data. 1 2. Seq. Test. Data. 1 row. Name. Add a more complex query with a join of two tables. Table. 1 do. join row. Table. 2 on row. Id row. Id. Seq. iteri fun index row. Table. 1. Id Test. Data. 1 Test. Data. Name Table. 2. Id Test. Data. 1 Test. Data. Name. printfn d d f s d d f s row. Id row. 1. Test. Data. Test. Data. 2 row. Name. row. 2. Id row. Test. Data. 1. Get. Value. Or. Default row. Test. Data. 2. Get. Value. Or. Default row. Name. In real world code, the parameters in your query are usually values or variables, not compile time constants. Add the following code that wraps a query in a function that takes a parameter, and then calls that function with the value 1. Data param. for row in db. Table. 1 do. where row. Test. Data. 1 param. Data 1. 0 Seq. Found row d d f s row. Id row. Test. Data. Test. Data. 2 row. Name. Working with nullable fields. In databases, fields often allow null values.