| 1234567891011121314151617181920 |
- declare option output:method 'json';
- (
- let $map := map { 'R': 'red', 'G': 'green', 'B': 'blue' }
- return (
- $map?* (: 1. returns all values; same as: map:keys($map) ! $map(.) :),
- $map?R (: 2. returns the value associated with the key 'R'; same as: $map('R') :),
- $map?('G','B') (: 3. returns the values associated with the key 'G' and 'B' :)
- ),
- ('A', 'B', 'C') => count(),
- for $country in db:open('factbook')//country
- where $country/@population > 100000000
- let $name := $country/name[1]
- for $city in $country//city[population > 1000000]
- group by $name
- return <country name='{ $name }'>{ $city/name }</country>
- )
|
