In Which Statement the Linq Query Is Executed?
LINQ queries are always executed when the query variable is iterated over, not when the query variable is created. This is called deferred execution. You can also force a query to execute immediately, which is useful for caching query results.

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Considering this, how query will get executed?

In the relational engine, a query is parsed and then processed by the query optimizer, which generates an execution plan. When any query reaches SQL Server, the first place it goes to is the relational engine. Optimization is the last step in the compilation process and generates the query execution plan.

Furthermore, what is Linq deferred execution? Deferred Execution of LINQ Query. Deferred execution means that the evaluation of an expression is delayed until its realized value is actually required. In the above example, you can see the query is materialized and executed when you iterate using the foreach loop. This is called deferred execution.

Consequently, what are LINQ queries?

LINQ (Language Integrated Query) is uniform query syntax in C# and VB.NET to retrieve data from different sources and formats. It is integrated in C# or VB, thereby eliminating the mismatch between programming languages and databases, as well as providing a single querying interface for different types of data sources.

Does AsEnumerable execute the query?

Calling AsEnumerable( ) does not execute the query, enumerating it does. IQueryable is the interface that allows LINQ to SQL to perform its magic. To force query execution, you must call ToList() .

Related Question Answers

How are SQL statements executed?

SELECT Statement Execution Order
In SQL, the first clause that is processed is the FROM clause, while the SELECT clause, which appears first in an SQL query, is processed much later. The phases involved in the logical processing of an SQL query are as follows: SELECT clause.

How does query work?

Queries help you find and work with your data
A query can either be a request for data results from your database or for action on the data, or for both. A query can give you an answer to a simple question, perform calculations, combine data from different tables, add, change, or delete data from a database.
James H. Sterling

James H. Sterling

Environmental Science & Climate Journalist

James Sterling reports on renewable energy developments, climate policy, ecological conservation, and green tech innovations around the globe.