|-
| <code>for $db in ('db1', 'db2')<br/>return db:get($db)</code>
| Read lock of {{Code|db1}} and {{Code|db2}}, as the query is [[XQuery OptimizationOptimizations#Loop Unrolling|unrolled at compile time]].
|-
| <code>let $db := 'test'<br/>return insert nodes <test/> into db:get($db)</code>