/// <summary>
/// 求和
/// </summary>
/// <typeparam name="TEntity">实体类型</typeparam>
/// <param name="expression">列名表达式</param>
/// <param name="columnAlias">列别名</param>
/// <returns></returns>
public ISqlBuilder Sum <TEntity>(Expression <Func <TEntity, object> > expression, string columnAlias = null) where TEntity : class
{
SelectClause.Sum(expression, columnAlias);
return(this);
}
public void TestSum_1()
{
_clause.Sum("a");
Assert.Equal("Select Sum([a])", GetSql());
}
/// <summary>
/// 求和
/// </summary>
/// <param name="column">列名</param>
/// <param name="columnAlias">列别名</param>
/// <returns></returns>
public ISqlBuilder Sum(string column, string columnAlias = null)
{
SelectClause.Sum(column, columnAlias);
return(this);
}