# Does aql support multiple ehrids?
**URL:** https://discourse.openehr.org/t/does-aql-support-multiple-ehrids/14364
**Category:** Technical (archive)
**Created:** [27 October 2017 06:20 UTC](https://discourse.openehr.org/t/does-aql-support-multiple-ehrids/14364 "2017-10-27T06:20:42Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@system](https://discourse.openehr.org/u/system)
#### Post date: [27 October 2017 06:20 UTC](https://discourse.openehr.org/t/does-aql-support-multiple-ehrids/14364/1 "2017-10-27T06:20:42Z")
Hi,
I have tested aql with single ehr and across all ehrs(without any ehrid). Can we pass an array of ehrids in an aql to limit the query to selected ehrs?
regards
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### Author:  [@system](https://discourse.openehr.org/u/system)
#### Post date: [27 October 2017 09:40 UTC](https://discourse.openehr.org/t/does-aql-support-multiple-ehrids/14364/2 "2017-10-27T09:40:59Z")
Marand THinkEHR supports this …
WHERE e/ehr\_id/value MATCHES {
‘e241715b-3ca7-435e-a474-718579aadaa2’,
‘0e7ac1d6-2dc6-40ec-8259-ac9f9a9727d1’,
‘ed74f788-4bd6-4e47-ab98-211643cc4b0c’}
---
### Author:  [@system](https://discourse.openehr.org/u/system)
#### Post date: [27 October 2017 09:52 UTC](https://discourse.openehr.org/t/does-aql-support-multiple-ehrids/14364/3 "2017-10-27T09:52:02Z")
Thanks Ian
Regards
Dileep V S
Founder
HealtheLife Ventures LLP
+91 9632888113
103, Innovation Centre, IIIT, Electronics City, Bangalore 560100, [healthelife.in](http://healthelife.in)
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### Author:  [@system](https://discourse.openehr.org/u/system)
#### Post date: [1 November 2017 20:38 UTC](https://discourse.openehr.org/t/does-aql-support-multiple-ehrids/14364/4 "2017-11-01T20:38:24Z")
There is a lot of use-cases involving multiple EHRs. The answer from Ian is defined in AQL specification.
In an upcoming version of the REST API I think population queries will be added to give client even more control on this kind of use-cases. We have already implemented this a while ago.
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