Difference between ExecuteNonQuery() and ExecuteScalar()

	ExecuteNonQuery()	ExecuteScalar()
1	It Returns the count of Rows Effected by the Query.	It Returns the First Row and First Column Value of the Query.
2	Int in Return Type.	Object in Return Type.
3	ExecuteNonQuery() works  Queries only. Create,Alter,Drop,Insert,Update,Delete.	ExecuteScalar() works Only Aggregate Functions Max,Min,Count,Sum,Total.
4	Can be assigned to an integer variable. Return value is optional.	Return value is Compulsory.
5	SqlCommand cmd=new SqlCommand(); cmd.ExecuteNonQuery();	SqlCommand cmd=new SqlCommand(); id = (Int16)cmd.ExecuteScalar(); return id;