src/Shared/EntityFramework/Core/Objects/ObjectQuery`.cs
/// <summary>Groups the query results by the specified criteria.</summary>
/// <returns>
/// A new <see cref="T:System.Data.Entity.Core.Objects.ObjectQuery`1" /> instance of type
/// <see
///     cref="T:System.Data.Common.DbDataRecord" />
/// that is equivalent to the original instance with GROUP BY applied.
/// </returns>
/// <param name="keys">The key columns by which to group the results.</param>
/// <param name="projection">The list of selected properties that defines the projection. </param>
/// <param name="parameters">Zero or more parameters that are used in this method.</param>
/// <exception cref="T:System.ArgumentNullException">The  query  parameter is null or an empty string 
/// or the  projection  parameter is null or an empty string.</exception>
Groups the query results by the specified criteria.
Groups the query results by the specified criteria .
public ObjectQuery<DbDataRecord> GroupBy(string keys, string projection, params ObjectParameter[] parameters)
        {
            Check.NotEmpty(keys, "keys");
            Check.NotEmpty(projection, "projection");
            Check.NotNull(parameters, "parameters");
            return new ObjectQuery<DbDataRecord>(EntitySqlQueryBuilder.GroupBy(QueryState, Name, keys, projection, parameters));
        }
public ObjectQuery < DbDataRecord > GroupBy ( string keys , string projection , params ObjectParameter [ ] parameters ) { Check . NotEmpty ( keys , " " ) ; Check . NotEmpty ( projection , " " ) ; Check . NotNull ( parameters , " " ) ; return new ObjectQuery < DbDataRecord > ( EntitySqlQueryBuilder . GroupBy ( QueryState , Name , keys , projection , parameters ) ) ; }
Groups the query results by the specified criteria.
Groups the query results by the specified criteria .
A new  instance of type

that is equivalent to the original instance with GROUP BY applied.
A new instance of type that is equivalent to the original instance with GROUP BY applied .
The  query  parameter is null or an empty string
or the  projection  parameter is null or an empty string.
The query parameter is null or an empty string or the projection parameter is null or an empty string .
keys
string
The key columns by which to group the results.
The key columns by which to group the results .
projection
string
The list of selected properties that defines the projection.
The list of selected properties that defines the projection .
parameters
Zero or more parameters that are used in this method.
Zero or more parameters that are used in this method .