What does ExecuteNonQuery mean?
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.
What will an ExecuteNonQuery return after execution?
Although the ExecuteNonQuery returns no rows, any output parameters or return values mapped to parameters are populated with data. For UPDATE, INSERT, and DELETE statements, the return value is the number of rows affected by the command. For all other types of statements, the return value is -1.
What does ExecuteNonQuery return on failure?
ExecuteNonQuery() Method:ExecuteNonQuery() method is used to manipulate data in database and is used for statements without results such as CREATE, INSERT, UPDATE and DELETE commands. It does not return any data but it returns number of rows affected.
What is use of ExecuteNonQuery () method?
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.
What is ExecuteScalar and ExecuteNonQuery?
ExecuteScalar() only returns the value from the first column of the first row of your query. ExecuteReader() returns an object that can iterate over the entire result set. ExecuteNonQuery() does not return data at all: only the number of rows affected by an insert, update, or delete.
What is difference between ExecuteNonQuery and Executequery?
Execute Scalar Use ExecuteReader for getting result set with multiple rows/columns (e.g., SELECT col1, col2 from MyTable . Use ExecuteNonQuery for SQL statements which will not retrieve results from database but make updation in existing database (e.g., UPDATE, INSERT, etc.).
What is the difference between ExecuteScalar and ExecuteNonQuery?
What is difference between ExecuteNonQuery and executeQuery?
What is the use of ExecuteNonQuery in Ado net?
ExecuteNonQuery method is used to execute SQL Command or the storeprocedure performs, INSERT, UPDATE or Delete operations. It doesn’t return any data from the database. Instead, it returns an integer specifying the number of rows inserted, updated or deleted.
When should ExecuteNonQuery not be called?
Not if they are INSERTs, DELETEs, CREATE TABLEs, etc. But a method that can execute a query (i.e., SELECT) should not be called ExecuteNonQuery. That’s what bothers me. It can execute a SELECT , but there’s no point using ExecuteNonQuery with a SELECT , because it doesn’t actually return a result.
What is difference between ExecuteReader and ExecuteNonQuery?
ExecuteReader is used for any result set with multiple rows/columns (e.g., SELECT col1, col2 from sometable ). ExecuteNonQuery is typically used for SQL statements without results (e.g., UPDATE, INSERT, etc.).
What is ExecuteNonQuery in VB net?
ExecuteNonQuery : 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.