Executes the query, and returns the first column of the first row in the result set returned by the query as a .NET Framework data type. Extra columns or rows are ignored.
Assembly: System.Data.OracleClient (in System.Data.OracleClient.dll)
Use the 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 necessary to generate the single value from the data returned by an OracleDataReader.
A typical query can be formatted as in the following C# example:
CommandText = "SELECT COUNT(*) FROM Region"; Int32 count = (int32) ExecuteScalar();
The following example creates an OracleCommand and then executes it using . The example is passed a string that is an SQL statement that returns an aggregate result, and a string to use to connect to the database.
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.