percentile_approx

Syntax

percentile_approx(DOUBLE col, p [, B])

Parameters

Return Values

The return value is of the DOUBLE type.

Example Code

• Calculates the 0.5 percentile of all offering inventories (items), with an accuracy of 100. An example command is as follows:

  select stddev_samp(items,0.5, 100) from warehouse;

  The command output is as follows:

  _c0        
  500        

• When used with group by, it groups all offerings by warehouse (warehourseId) and returns the 0.5 percentile of the offering inventory (items) in the same group, with an accuracy of 100. An example command is as follows:

  select warehourseId, stddev_samp(items, 0.5, 100) from warehourse group by warehourseId; 

  The command output is as follows:

  warehouseId _c1        
  city1     499        
  city2     354        
  city3     565