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Querying the Database. 2 minutes to read. Contributors. In this article This group of topics describes how to develop and execute queries in LINQ to SQL projects.
Understanding LINQ to SQL Query Translations. Saturday, September 2, 2006.NET ASP.NET Data LINQ SQL Server. I posted two blog posts last weekend about using LINQ to easily perform data access against a database. Several people have asked me for more details on LINQ to SQL since then. Where Clauses and Database Queries; LINQ for SQL Queries. LINQPad can be thought of as a 'scratch pad' for writing and testing LINQ to SQL queries (and for that matter, any type of LINQ query -- LINQ to Objects, LINQ to XML, etc.). In the simplest use case for LINQ to SQL, you create a database connection for your database and start writing LINQ to SQL expressions against it in the editor.
In This Section Briefly shows how LINQ to SQL queries are basically the same as LINQ queries generally. Describes how to increase query performance when no change to the data is planned. Describes how to control which related data is retrieved together with the main target. Describes how to retrieve related data by using a sub-query. Describes how to turn off deferred loading. Describes how to submit queries by using SQL language. Describes how to compile a query one time but use it multiple times with different parameters.
Describes how to include more than one column in a query where the operator takes only a single argument. Describes how to use. Describes another use of. Provides many examples of queries.
Linq-to-Entities Query Here, you will learn how to write LINQ-to-Entities queries and get the result in Entity Framework 6.x as well as in Entity Framework Core. Visit to learn LINQ step by step. The DbSet class is derived from IQuerayable.
So, we can use for querying against DbSet, which will be converted to an SQL query. EF API executes this SQL query to the underlying database, gets the flat result set, converts it into appropriate entity objects and returns it as a query result. The following are some of the standard query operators (or extension methods) that can be used with LINQ-to-Entities queries.