상속: Shaolinq.Persistence.Linq.Expressions.SqlExpressionVisitor
		public static Expression Coalesce(Expression expression)
		{
			var coalescer = new SqlSumAggregatesDefaultValueCoalescer();

			return coalescer.Visit(expression);
		}
        public static Expression Coalesce(Expression expression)
        {
            var coalescer = new SqlSumAggregatesDefaultValueCoalescer();

            return(coalescer.Visit(expression));
        }