* __filter
*
* Parses the selection criteria, extracts the database rows that match those criteria, and
* returns that subset of rows.
*
* @access private
*
* SUMIF
*
* Counts the number of cells that contain numbers within the list of arguments
*
* Excel Function:
* SUMIF(value1[,value2[, ...]],condition)
*
* @access public
* @category Mathematical and Trigonometric Functions
*
* AVERAGEIF
*
* Returns the average value from a range of cells that contain numbers within the list of arguments
*
* Excel Function:
* AVERAGEIF(value1[,value2[, ...]],condition)
*
* @access public
* @category Mathematical and…
* COUNTIF
*
* Counts the number of cells that contain numbers within the list of arguments
*
* Excel Function:
* COUNTIF(value1[,value2[, ...]],condition)
*
* @access public
* @category Statistical Functions
*
* MAXIF
*
* Counts the maximum value within a range of cells that contain numbers within the list of arguments
*
* Excel Function:
* MAXIF(value1[,value2[, ...]],condition)
*
* @access public
* @category Mathematical and Trigonometric…
* MINIF
*
* Returns the minimum value within a range of cells that contain numbers within the list of arguments
*
* Excel Function:
* MINIF(value1[,value2[, ...]],condition)
*
* @access public
* @category Mathematical and…