/**
* Appends the expression(s) that will condense into a single row all selected rows that share
* the same values for the grouped expressions.
*
* Multiple arguments implementing ISqlValueExpression are accepted.
*
* Expression can be an input column name, or the name or ordinal number of an output column
* (SELECT list item), or an arbitrary expression formed from input-column value.
*
* @param ISqlValueExpression ...
* @return SelectQuery itself
*/
function groupBy(ISqlValueExpression $expression)
{
$expressions = func_get_args();
foreach ($expressions as $expression) {
$this->groups->append($expression);
}
return $this;
}
/**
* Appends the expression that will condense into a single row all selected rows that share
* the same values for the grouped expressions.
*
* Expression can be an input column name, or the name or ordinal number of an output column
* (SELECT list item), or an arbitrary expression formed from input-column value.
*
* @param ISqlValueExpression
* @return SelectQuery itself
*/
function addGroupBy(ISqlValueExpression $expression)
{
$this->groups->append($expression);
return $this;
}
