ExecuteNonQuery() returns number of rows affected(ex: 2 rows updated), so return type of ExecuteNonQuery is Integer. ExecuteScalar() is used to retrieve a single value from database, so return type of ExecuteScalar is Object.
What is the return type of ExecuteNonQuery () method?
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 ExecuteScalar return?
The ExecuteScalar() executes SQL statements as well as Stored Procedure and returned a scalar value on first column of first row in the returned Result Set. If the Result Set contains more than one columns or rows, it will take only the value of first column of the first row, and all other values will ignore.
What data type is returned when calling the ExecuteScalar method of a command object?
Object data type is returned when calling ExecuteScalar method of command object – ADO.NET. Q.
What difference is between 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 the return type of ExecuteScalar () method?
ExecuteScalar() is used to retrieve a single value from database, so return type of ExecuteScalar is Object.
What is use of ExecuteScalar method?
Use the ExecuteScalar method to retrieve a single value (for example, an aggregate value) from a database. This requires less code than using the ExecuteReader method, and then performing the operations that you need to generate the single value using the data returned by a SqlDataReader.
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 ()?
ExecuteScalar() in SqlCommand Object is used for get a single value from Database after its execution. It executes SQL statements or Stored Procedure and returned a scalar value on first column of first row in the Result Set.
What is the use of ExecuteScalar () method Mcq?
– ExecuteScalar: This method returns single value. Its return type is Object. If you call ExecuteScalar method with a SQL statement that returns rows of data, the query executes but returns only the first column of the first row returned by the query.
Which is not an integer data type?
The floating point number is not the integer datatype as the integer data type are not allowed the negative and decimal number. Therefore, floating point is not the integer datatype.
Which is a numeric data type?
Numeric data types are numbers stored in database columns. These data types are typically grouped by: The exact numeric types are INTEGER, BIGINT, DECIMAL, NUMERIC, NUMBER, and MONEY. Approximate numeric types, values where the precision needs to be preserved and the scale can be floating.
What is command object method Mcq?
Command object has three methods:
- Execute: Executes the queries, stored procedures etc.
- Cancel: Stops the method execution.
- CreateParameter: To create a parameter object. Next Page »
What does ExecuteScalar return if no rows?
If the row does not exist, the result of command. ExecuteScalar() is null, which is then casted to a null string and assigned to getusername.
What is ExecuteScalar in VB net?
ExecuteScalar() in SqlCommand Object is used for get a single value from Database after its execution. It executes SQL statements or Stored Procedure and returned a scalar value on first column of first row in the Result Set. If the Result Set is empty it will return a Null reference.
Post navigation
ncG1vNJzZmismJq2r7LIp6CtnZuewaS0xKdlnKedZLS2tcOeZqqtmZi4bq3NrK6eql2staLAjKKqZqyYmnqzsdOuqadlpK69pnnOn2SesJWYwrWxzailqq2Vp8ZuucStn6icXZa7pXnEsZycraSawKSty5qpZqWVqbWwsI4%3D