# Data types in the pivot table

Some pivot table properties use the set data types Column Selector and Order Specifier.

- Column Selector
- A comma-separated list of positive integers numbering 0 for the first column and
`n`-1 for the last column in a table of`n`columns. - Order Specifier
- A comma-separated list of positive integers numbering 0 for the first column and
`n`-1 for the last column in a table of`n`columns. Positive values specify ascending values, and negative values specify descending order.

There is a difference between not setting a value and specifying an empty value. If a value is not set, all or nothing may be selected, depending on the context. The empty value always means the empty set.