From d6d8bfe685eee153269fede774a7b5de7ac67842 Mon Sep 17 00:00:00 2001
From: dapan1121 <72057773+dapan1121@users.noreply.github.com>
Date: Thu, 9 Nov 2023 08:57:07 +0800
Subject: [PATCH] Update 12-distinguished.md

---
 docs/en/12-taos-sql/12-distinguished.md | 15 +++++----------
 1 file changed, 5 insertions(+), 10 deletions(-)

diff --git a/docs/en/12-taos-sql/12-distinguished.md b/docs/en/12-taos-sql/12-distinguished.md
index 328fb62bf3..502b7562f3 100644
--- a/docs/en/12-taos-sql/12-distinguished.md
+++ b/docs/en/12-taos-sql/12-distinguished.md
@@ -38,20 +38,15 @@ Aggregation by time window is supported in TDengine. For example, in the case wh
 window_clause: {
     SESSION(ts_col, tol_val)
   | STATE_WINDOW(col)
-  | INTERVAL(interval [, offset]) [SLIDING (interval)] [FILL({NONE | VALUE | PREV | NULL | LINEAR | NEXT})]
+  | INTERVAL(interval_val [, offset]) [SLIDING (sliding_value)] [FILL({NONE | VALUE | PREV | NULL | LINEAR | NEXT})]
   | EVENT_WINDOW START WITH start_trigger_condition END WITH end_trigger_condition
 }
-interval:
-    TK_NUMBER
-  | TK_STRING
-  | TK_DURATION
 ```
 
-The parameters of INTERVAL(`interval` or `offset`) and SLIDING are time durations which have 3 forms of representation.
-
-- `INTERVAL(1s, 500a) SLIDING(1s)`, the unit char should be one of `a (millisecond), b (nanosecond), d (day), h (hour), m (minute), n (month), s (second), u (microsecond), w (week), y (year)`.
-- `INTERVAL(1000, 500) SLIDING(1000)`, the unit will the same as the database.
-- `INTERVAL('1s', '500a') SLIDING('1s')`, or double quoted. Unit must be specified, no spaces allowed.
+Both interval_val and sliding_value are time durations which have 3 forms of representation.
+- INTERVAL(1s, 500a) SLIDING(1s), the unit char should be any one of a (millisecond), b (nanosecond), d (day), h (hour), m (minute), n (month), s (second), u (microsecond), w (week), y (year).
+- INTERVAL(1000, 500) SLIDING(1000), the unit will the same as the queried database, if there are more than one databases, higher precision will be used.
+- INTERVAL('1s', '500a') SLIDING('1s'), unit must be specified, no spaces allowed.
 
 The following restrictions apply: