diff --git a/internal/data/business/channel_metrics.go b/internal/data/business/channel_metrics.go
index 95863de..d2e6875 100644
--- a/internal/data/business/channel_metrics.go
+++ b/internal/data/business/channel_metrics.go
@@ -2,11 +2,37 @@ package business
 
 import (
 	"context"
+	"sort"
 
 	"gorm.io/gorm"
 	"kra/internal/biz/business"
 )
 
+func whereMetricChannels(db *gorm.DB, keys []business.ChannelKey) *gorm.DB {
+	bySource := map[string][]uint64{}
+	for _, key := range keys {
+		bySource[key.SourceDB] = append(bySource[key.SourceDB], key.ID)
+	}
+	sources := make([]string, 0, len(bySource))
+	for source := range bySource {
+		sources = append(sources, source)
+	}
+	sort.Strings(sources)
+	if len(sources) == 0 {
+		return db.Where("1=0")
+	}
+	var condition *gorm.DB
+	for _, source := range sources {
+		part := db.Session(&gorm.Session{NewDB: true}).Where("source_db=? AND promote_id IN ?", source, bySource[source])
+		if condition == nil {
+			condition = part
+		} else {
+			condition = condition.Or(part)
+		}
+	}
+	return db.Where(condition)
+}
+
 func (r *channelRepo) Metrics(ctx context.Context, roots, statKeys []business.ChannelKey, dedup bool) (*business.ChannelMetricData, error) {
 	db := r.data.DB().WithContext(ctx)
 	metrics := &business.ChannelMetricData{Games: map[business.ChannelKey]int64{}, Players: map[business.ChannelKey]int64{}, Pay: map[business.ChannelKey]string{}}
@@ -31,7 +57,7 @@ func (r *channelRepo) Metrics(ctx context.Context, roots, statKeys []business.Ch
 	if metrics.GamesAvailable {
 		for start := 0; start < len(roots); start += 300 {
 			var rows []countRow
-			if err := db.Table("tab_promote_apply").Select("source_db,promote_id,COUNT(DISTINCT game_id) AS count").Where("status = 1 AND (source_db,promote_id) IN ?", channelPairs(roots[start:min(start+300, len(roots))])).Group("source_db,promote_id").Scan(&rows).Error; err != nil {
+			if err := whereMetricChannels(db, roots[start:min(start+300, len(roots))]).Table("tab_promote_apply").Select("source_db,promote_id,COUNT(DISTINCT game_id) AS count").Where("status = 1").Group("source_db,promote_id").Scan(&rows).Error; err != nil {
 				return nil, business.ErrStorage
 			}
 			for _, row := range rows {
@@ -41,9 +67,9 @@ func (r *channelRepo) Metrics(ctx context.Context, roots, statKeys []business.Ch
 	}
 	// 每批按平台/渠道一起查询，避免逐个渠道访问数据库，也避免参数数量无限增长。
 	for start := 0; start < len(statKeys); start += 300 {
-		pairs := channelPairs(statKeys[start:min(start+300, len(statKeys))])
+		keys := statKeys[start:min(start+300, len(statKeys))]
 		if metrics.PlayersAvailable {
-			q := db.Table("tab_user").Where("(puid = 0 OR puid IS NULL) AND (source_db,promote_id) IN ?", pairs)
+			q := whereMetricChannels(db, keys).Table("tab_user").Where("puid = 0 OR puid IS NULL")
 			if dedup {
 				var players []struct {
 					SourceDB          string `gorm:"column:source_db"`
@@ -72,7 +98,7 @@ func (r *channelRepo) Metrics(ctx context.Context, roots, statKeys []business.Ch
 				PromoteID uint64
 				Amount    string
 			}
-			if err := db.Table("tab_spend").Select("source_db,promote_id,COALESCE(SUM(pay_amount),0) AS amount").Where("pay_status = 1 AND (source_db,promote_id) IN ?", pairs).Group("source_db,promote_id").Scan(&rows).Error; err != nil {
+			if err := whereMetricChannels(db, keys).Table("tab_spend").Select("source_db,promote_id,COALESCE(SUM(pay_amount),0) AS amount").Where("pay_status = 1").Group("source_db,promote_id").Scan(&rows).Error; err != nil {
 				return nil, business.ErrStorage
 			}
 			for _, row := range rows {
diff --git a/internal/data/business/channel_sort.go b/internal/data/business/channel_sort.go
index c071a8b..9ec5a47 100644
--- a/internal/data/business/channel_sort.go
+++ b/internal/data/business/channel_sort.go
@@ -54,6 +54,10 @@ func channelMetricPage(db, roots *gorm.DB, f business.ChannelFilter, o business.
 	index := "idx_sw_user_report_identity"
 	if table == "tab_spend" {
 		index = "idx_sw_spend_promote_summary"
+	} else if !f.IDCardDedup {
+		// Its source/channel prefix supports both filtering and grouped counting,
+		// without sorting the much wider identity index into a temporary table.
+		index = "idx_alert_user_window"
 	}
 	if db.Dialector.Name() == "mysql" && db.Migrator().HasIndex(table, index) {
 		metricTable += " FORCE INDEX (" + index + ")"
@@ -112,14 +116,20 @@ func channelMetricPage(db, roots *gorm.DB, f business.ChannelFilter, o business.
 			Score    string
 		}
 		if f.SortField == "totalPayAmount" {
-			leaves = leaves.Select("source_db,promote_id,COALESCE(SUM(pay_amount),0) AS score")
+			leaves = leaves.Select("source_db,promote_id AS root_id,promote_id,COALESCE(SUM(pay_amount),0) AS score")
 		} else {
-			leaves = leaves.Select("source_db,promote_id,COUNT(*) AS score")
+			leaves = leaves.Select("source_db,promote_id AS root_id,promote_id,COUNT(*) AS score")
 		}
 		leaves = leaves.Group("source_db,promote_id")
-		q = q.Joins("JOIN (?) leaf ON leaf.source_db=cm.source_db AND leaf.promote_id=cm.leaf_id", leaves).
-			Select("cm.source_db,cm.root_id,SUM(leaf.score) AS score")
-		if err := q.Group("cm.source_db,cm.root_id").Scan(&values).Error; err != nil {
+		if f.IncludeSub {
+			q = q.Joins("JOIN (?) leaf ON leaf.source_db=cm.source_db AND leaf.promote_id=cm.leaf_id", leaves).
+				Select("cm.source_db,cm.root_id,SUM(leaf.score) AS score").Group("cm.source_db,cm.root_id")
+		} else {
+			// A channel's own score needs no membership join or second grouping.
+			// Scores remain internal; pagination below only returns visible roots.
+			q = leaves
+		}
+		if err := q.Scan(&values).Error; err != nil {
 			return nil, business.ErrStorage
 		}
 		for _, value := range values {
diff --git a/internal/data/business/mysql_rehearsal_test.go b/internal/data/business/mysql_rehearsal_test.go
index de9ea9f..8c0408e 100644
--- a/internal/data/business/mysql_rehearsal_test.go
+++ b/internal/data/business/mysql_rehearsal_test.go
@@ -262,6 +262,37 @@ func TestMySQLLaterRegistrationIndexesPreserveMalformedLegacyTimes(t *testing.T)
 	}
 }
 
+func TestMySQLChannelOwnPlayerSortUsesGroupedCoveringIndex(t *testing.T) {
+	db := openRehearsalMySQL(t)
+	for _, sql := range []string{
+		"CREATE TABLE tab_promote(id BIGINT,source_db VARCHAR(10),create_time BIGINT,PRIMARY KEY(id,source_db))",
+		"CREATE TABLE tab_user(id BIGINT,source_db VARCHAR(10),promote_id BIGINT,puid BIGINT,sw_register_time_unix BIGINT,idcard VARCHAR(20),PRIMARY KEY(id,source_db),INDEX idx_alert_user_window(source_db,promote_id,sw_register_time_unix,puid))",
+		"INSERT INTO tab_promote VALUES(1,'lx',1),(2,'lx',2),(1,'hw',3)",
+		"INSERT INTO tab_user VALUES(1,'lx',1,0,1,'a'),(2,'lx',1,0,1,'a'),(3,'lx',2,0,1,'b'),(1,'hw',1,0,1,'c')",
+	} {
+		if err := db.Exec(sql).Error; err != nil {
+			t.Fatal(err)
+		}
+	}
+	keys, err := channelMetricPage(db, db.Table("tab_promote p").Where("p.source_db='lx'"), business.ChannelFilter{Sources: []string{"lx"}, SortField: "playerCount"}, business.NewListOptions(business.ListLimit(1)))
+	if err != nil || len(keys) != 1 || keys[0] != (business.ChannelKey{SourceDB: "lx", ID: 1}) {
+		t.Fatalf("own-channel sort: %v %v", keys, err)
+	}
+	var counts []struct {
+		SourceDB  string
+		PromoteID uint64
+		Count     int64
+	}
+	if err := whereMetricChannels(db, []business.ChannelKey{{SourceDB: "lx", ID: 2}, {SourceDB: "hw", ID: 1}}).Table("tab_user").Select("source_db,promote_id,COUNT(*) AS count").Group("source_db,promote_id").Scan(&counts).Error; err != nil || len(counts) != 2 {
+		t.Fatalf("paired source filter: %v %v", counts, err)
+	}
+	for _, row := range counts {
+		if row.Count != 1 {
+			t.Fatalf("included a same-id channel from another platform: %+v", row)
+		}
+	}
+}
+
 func TestMySQLChannelCreationSerializesAccount(t *testing.T) {
 	db := openRehearsalMySQL(t)
 	if err := db.AutoMigrate(&platformChannelPO{}, &channelSettlementPO{}); err != nil {