NoSQL operator: rndtable
Pick one or more records at random from a table.
Usage: rndtable [options]
Options:
--input (-i) 'file'
Read input from 'file' instead of STDIN.
--output (-o) 'file'
Write output to 'file' instead of STDOUT.
--help (-h)
Display this help text.
--no-header (-N)
Remove header from output.
--lines (-L) 'N'
Pick at most 'N' input records. By default only one
input record is printed.
--zero (-z)
By default at least one record is selected. This option
specifies that selecting no records is ok.
--key (-K)
Instead of printing complete records, just print their
first (leftmost) field, supposedly the record key.
This will save us a subsequent call to 'column' if all
we need is to extract the record keys.
Notes:
Not many tests have been done to assess how uniform is the random
selection of input records.