anchor.diff:              + Members
                   + INTEGER - for numbers without a decimal point
                   + DOUBLE - for number with a decimal point
  -
  +    + orderBy[] (optional) - Snowflake only
  +        + column (required) - name of column used for sorting
  +        + order (optional, enum[string])
  +            + Members
  +                + ASC - ascending sort
  +                + DESC - descending sort
  +            + Default ASC
  +        + dataType (optional, enum[string]) - required when sorting by column contains numeric value
  +            + Members
  +                + INTEGER - for numbers without a decimal point
  +                + DOUBLE - for number with a decimal point
   
   + Request
       + Headers
  
positive.code:             + Default: eq
          + values[] (required, array) - array of variables to compare
          + dataType (optional, enum[string]) - Snowflake only - for comparing ([gt|lt|le|ge]) numeric values you have to specify data type
              + Members
                  + INTEGER - for numbers without a decimal point
                  + DOUBLE - for number with a decimal point
  
negative.code: 
   - For multiple filters use `whereFilters[0]...&whereFilters[1]...&whereFilters[2]...`. All filters are joined by AND expression.
  
  #### Rows sorting
  Exported rows can be sorted by multiple column. Examples of sorting:
  
  - `orderBy[0][column]=UserId`
  Sorting ascending by column UserId.
  Equals to `ORDER BY UserId ASC`.
  
  - `orderBy[0][column]=UserId&orderBy[0][order]=DESC`
  Sorting descending by column UserId.
  Equals to `ORDER BY UserId DESC`.
  
  - `orderBy[0][column]=Price&orderBy[0][order]=DESC&orderBy[0][dataType]=DOUBLE`
  Sorting descending by column Price with casting column Price to DOUBLE
  Equals to `ORDER BY try_to_double(Price) DESC`.
  
   - For multiple sort condititions use `orderBy[0]...&orderBy[1]...&orderBy[2]`.
  
  The comparison operator essentially behaves like the [SQL IN](http://www.w3schools.com/sql/sql_in.asp) (and NOT IN) operator. That is, the
  `eq` value matches if any `whereValues` match, and the `new` value matches if none `whereValues` match.
  