summ

Produces "summary" information about the rdbtable. If no columns are given then information about all columns is produced. A Count of the data rows is always shown.

This operator reads an rdbtable via STDIN and writes a summary report via STDOUT. Options may be abbreviated.

Options:

• -cu - A Count of the unique values for each column given.
• -cun - Like option '-cu' but also shows counts of null (empty) and blank values (have only space chars), if either exist.
• -cuu - A Count of each unique value for each column given.
• -help - Print this help information.
• -m - The min, average, max, for each column given.
• -v - Inverse option. Selects all columns except those named.