diff --git a/db/updatesql/20260903-watch_monitor_data新增字段.sql b/db/updatesql/20260903-watch_monitor_data新增字段.sql
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+-- WATCH_MONITOR_DATA 新增 EVENT_ID（事件ID）和 LOCATE_TIME（定位时间）字段
+-- 数据库：118-DM 达梦数据库，SQL 全大写规范
+ALTER TABLE "WATCH_MONITOR_DATA" ADD "EVENT_ID" VARCHAR(64) DEFAULT NULL;
+ALTER TABLE "WATCH_MONITOR_DATA" ADD "LOCATE_TIME" DATETIME DEFAULT NULL;
+
+COMMENT ON COLUMN "WATCH_MONITOR_DATA"."EVENT_ID" IS '事件ID';
+COMMENT ON COLUMN "WATCH_MONITOR_DATA"."LOCATE_TIME" IS '定位时间';
+
+CREATE INDEX "IDX_EVENT_ID" ON "WATCH_MONITOR_DATA"("EVENT_ID");
+CREATE INDEX "IDX_WATCH_NO_EVENT_ID" ON "WATCH_MONITOR_DATA"("WATCH_NO", "EVENT_ID");