What is non query?

Apr, 2016 1. ExecuteNonQuery used for executing queries that does not return any data. It is used to execute the sql statements like update, insert, delete etc. ExecuteNonQuery executes the command and returns the number of rows affected. Jan, 2018 20.

Why do we need SqlCommand in C#?

SqlCommand in C# allow the user to query and send the commands to the database. SQL command is specified by the SQL connection object. Two methods are used, ExecuteReader method for results of query and ExecuteNonQuery for insert, Update, and delete commands. It is the method that is best for the different commands.

Why do we use SqlConnection?

A SqlConnection object represents a unique session to a SQL Server data source. With a client/server database system, it is equivalent to a network connection to the server. SqlConnection is used together with SqlDataAdapter and SqlCommand to increase performance when connecting to a Microsoft SQL Server database.

What is the use of SqlCommand?

A SqlCommand object allows you to specify what type of interaction you want to perform with a database. For example, you can do select, insert, modify, and delete commands on rows of data in a database table.

Does SqlCommand open connection?

Remarks. The SqlConnection draws an open connection from the connection pool if one is available. Otherwise, it establishes a new connection to an instance of SQL Server. If the SqlConnection goes out of scope, it is not closed.

What is the use of ExecuteNonQuery?

ExecuteNonQuery: Use this operation to execute any arbitrary SQL statements in SQL Server if you do not want any result set to be returned. You can use this operation to create database objects or change data in a database by executing UPDATE, INSERT, or DELETE statements.

How do I use SqlConnection?

Using a SqlConnection

1. Instantiate the SqlConnection.
2. Open the connection.
3. Pass the connection to other ADO.NET objects.
4. Perform database operations with the other ADO.NET objects.
5. Close the connection.

What is the use of sqlcecommand?

When an instance of SqlCeCommand is created, the read/write properties are set to their initial values. For a list of these values, see the SqlCeCommand constructor. Executes commands that return rows. Executes SQL commands such as INSERT, DELETE, and UPDATE statements.

What is the use of SqlCommand in C?

This program uses the SqlCommand data object in C#. We use SqlCommand in the context of a complete but trivial program that reads data from a specific database on the disk. Info The SqlCommand type has a public parameterized constructor and it can be used with one or more arguments.

What are the sqlcecommand read/write properties?

When an instance of SqlCeCommand is created, the read/write properties are set to their initial values. For a list of these values, see the SqlCeCommand constructor. Executes commands that return rows. Executes SQL commands such as INSERT, DELETE, and UPDATE statements. Retrieves a single value (for example, an aggregate value) from a database.

Is sqlcecommand thread safe?

The following example uses SqlCeCommand, along with SqlCeConnection, to select rows from a database. Any public static (Shared in Microsoft Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.