diff --git a/src/pra/doc.ts b/src/pra/doc.ts
index a0f0e45..c30380b 100644
--- a/src/pra/doc.ts
+++ b/src/pra/doc.ts
@@ -1,4 +1,4 @@
-import type { Agd, Soc, Usr } from "../eid/typ.ts"
+import type { Agd, Rec, Soc, Usr } from "../eid/typ.ts"
 import { coll } from "../eid/db.ts"
 import { id, idadm, idnam } from "../eid/id.ts"
 import { usr_r } from "../eid/usr.ts"
@@ -76,3 +76,16 @@ export async function agd(
 	const [soc] = await idnam(coll.soc, [a.soc])
 	return { ...a, soc }
 }
+
+export async function rec(
+	q: "cdt" | "dbt" | "ern",
+	id: { usr: Rec["_id"]["usr"] } | { soc: Rec["_id"]["soc"] },
+	utc: Rec["_id"]["utc"],
+) {
+	const r = await rec_f(coll[q], id, { to: utc })
+	const [usr, soc] = await Promise.all([
+		idnam(coll.usr, r.flatMap(({ _id: { usr }, sec }) => sec ? [usr, sec] : [usr])),
+		idnam(coll.soc, r.map(r => r._id.soc)),
+	])
+	return { rec: r, usr, soc }
+}
diff --git a/src/pra/que.ts b/src/pra/que.ts
index 26173fd..352cace 100644
--- a/src/pra/que.ts
+++ b/src/pra/que.ts
@@ -1,7 +1,7 @@
 import type { Agd, Msg, Rec, Soc, Usr } from "../eid/typ.ts"
 import { json } from "../ont/json.ts"
 import { Ret } from "./can.ts"
-import { adm, agd, soc, usr } from "./doc.ts"
+import { adm, agd, rec, soc, usr } from "./doc.ts"
 
 export type Que = {
 	que: "adm",
@@ -35,6 +35,9 @@ export type QueRet = {
 	usr: Ret<typeof usr>,
 	soc: Ret<typeof soc>,
 	agd: Ret<typeof agd>,
+	cdt: Ret<typeof rec>,
+	dbt: Ret<typeof rec>,
+	ern: Ret<typeof rec>,
 }
 
 export function que(
@@ -47,6 +50,8 @@ export function que(
 		case "usr": return usr("nam" in q ? { nam: q.nam } : { _id: q.usr })
 		case "soc": return soc(q.soc)
 		case "agd": return agd(q.agd)
+		case "cdt": case "dbt": case "ern":
+			return rec(q.que, "usr" in q ? { usr: q.usr } : { soc: q.soc }, q.utc)
 	}
 
 	return null
diff --git a/tst/que.test.ts b/tst/que.test.ts
index 745d0fa..ef55736 100644
--- a/tst/que.test.ts
+++ b/tst/que.test.ts
@@ -53,4 +53,5 @@ Deno.test("que", async () => {
 	assertEquals(usr, { ...await que(`?que="usr"&nam="用户"`) as QueRet["usr"], utc: now })
 	assertEquals(soc, { ...await que(`?que="soc"&soc=1`) as QueRet["soc"], utc: now })
 	assertEquals(agd, { ...await que(`?que="agd"&agd=1`) as QueRet["agd"], utc: now })
+	assertEquals(cdt, (await que(`?que="cdt"&usr=2&utc=0`) as QueRet["cdt"])?.rec.reverse())
 })