# Does aql support multiple ehrids?

**Category:** [Technical (archive)](https://discourse.openehr.org/c/technical-archive/156)
**Created:** 2017-10-27 06:20 UTC
**Views:** 1
**Replies:** 3
**URL:** https://discourse.openehr.org/t/does-aql-support-multiple-ehrids/14364

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## Post #1 by @system

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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## Post #2 by @system

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'}

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## Post #3 by @system

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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## Post #4 by @system

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.

Vennlig hilsen
Bjørn Næss
Produktansvarlig
DIPS ASA

Mobil +47 93 43 29 10

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**Canonical:** https://discourse.openehr.org/t/does-aql-support-multiple-ehrids/14364
**Original content:** https://discourse.openehr.org/t/does-aql-support-multiple-ehrids/14364