diff --git a/backend/sql/08_trade.sql b/backend/sql/08_trade.sql
index 653a716..fa4d20b 100644
--- a/backend/sql/08_trade.sql
+++ b/backend/sql/08_trade.sql
@@ -31,27 +31,27 @@ BEGIN
 
     -- remark 子表
     IF NOT EXISTS (SELECT 1 FROM information_schema.tables WHERE table_name = 'trade_remark') THEN
-        CREATE TABLE remark (
+        CREATE TABLE trade_remark (
             id UUID DEFAULT gen_random_uuid() PRIMARY KEY,
-            trade_id UUID NOT NULL,
+            trade_id UUID NOT NULL REFERENCES trade(id) ON DELETE CASCADE,
             remark VARCHAR NOT NULL,
             deleted BOOLEAN NOT NULL DEFAULT FALSE,
             created_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
             updated_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP
         );
-        CREATE TRIGGER update_remark_updated_at
-            BEFORE UPDATE ON remark
+        CREATE TRIGGER update_trade_remark_updated_at
+            BEFORE UPDATE ON trade_remark
             FOR EACH ROW EXECUTE FUNCTION update_data_modified_column();
-        RAISE NOTICE '2️⃣✅ remark 子表已创建';
+        RAISE NOTICE '2️⃣✅ trade_remark 子表已创建';
     ELSE
-        RAISE NOTICE '2️⃣⏩ remark 子表已存在，跳过';
+        RAISE NOTICE '2️⃣⏩ trade_remark 子表已存在，跳过';
     END IF;
 
     -- open_date 子表
     IF NOT EXISTS (SELECT 1 FROM information_schema.tables WHERE table_name = 'trade_open_date') THEN
-        CREATE TABLE open_date (
+        CREATE TABLE trade_open_date (
             id UUID DEFAULT gen_random_uuid() PRIMARY KEY,
-            trade_id UUID NOT NULL,
+            trade_id UUID NOT NULL REFERENCES trade(id) ON DELETE CASCADE,
             year INT NOT NULL DEFAULT 0,
             month INT NOT NULL DEFAULT 0,
             day INT NOT NULL DEFAULT 0,
@@ -59,92 +59,92 @@ BEGIN
             created_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
             updated_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP
         );
-        CREATE TRIGGER update_open_date_updated_at
-            BEFORE UPDATE ON open_date
+        CREATE TRIGGER update_trade_open_date_updated_at
+            BEFORE UPDATE ON trade_open_date
             FOR EACH ROW EXECUTE FUNCTION update_data_modified_column();
-        RAISE NOTICE '3️⃣✅ open_date 子表已创建';
+        RAISE NOTICE '3️⃣✅ trade_open_date 子表已创建';
     ELSE
-        RAISE NOTICE '3️⃣⏩ open_date 子表已存在，跳过';
+        RAISE NOTICE '3️⃣⏩ trade_open_date 子表已存在，跳过';
     END IF;
 
     -- variety 子表
     IF NOT EXISTS (SELECT 1 FROM information_schema.tables WHERE table_name = 'trade_variety') THEN
-        CREATE TABLE variety (
+        CREATE TABLE trade_variety (
             id UUID DEFAULT gen_random_uuid() PRIMARY KEY,
-            trade_id UUID NOT NULL,
+            trade_id UUID NOT NULL REFERENCES trade(id) ON DELETE CASCADE,
             variety_id UUID NOT NULL,
             variety_name VARCHAR NOT NULL,
             deleted BOOLEAN NOT NULL DEFAULT FALSE,
             created_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
             updated_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP
         );
-        CREATE TRIGGER update_variety_updated_at
-            BEFORE UPDATE ON variety
+        CREATE TRIGGER update_trade_variety_updated_at
+            BEFORE UPDATE ON trade_variety
             FOR EACH ROW EXECUTE FUNCTION update_data_modified_column();
-        RAISE NOTICE '4️⃣✅ variety 子表已创建';
+        RAISE NOTICE '4️⃣✅ trade_variety 子表已创建';
     ELSE
-        RAISE NOTICE '4️⃣⏩ variety 子表已存在，跳过';
+        RAISE NOTICE '4️⃣⏩ trade_variety 子表已存在，跳过';
     END IF;
 
     -- direction 子表
     IF NOT EXISTS (SELECT 1 FROM information_schema.tables WHERE table_name = 'trade_direction') THEN
-        CREATE TABLE direction (
+        CREATE TABLE trade_direction (
             id UUID DEFAULT gen_random_uuid() PRIMARY KEY,
-            trade_id UUID NOT NULL,
+            trade_id UUID NOT NULL REFERENCES trade(id) ON DELETE CASCADE,
             direction VARCHAR NOT NULL,
             deleted BOOLEAN NOT NULL DEFAULT FALSE,
             created_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
             updated_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP
         );
-        CREATE TRIGGER update_direction_updated_at
-            BEFORE UPDATE ON direction
+        CREATE TRIGGER update_trade_direction_updated_at
+            BEFORE UPDATE ON trade_direction
             FOR EACH ROW EXECUTE FUNCTION update_data_modified_column();
-        RAISE NOTICE '5️⃣✅ direction 子表已创建';
+        RAISE NOTICE '5️⃣✅ trade_direction 子表已创建';
     ELSE
-        RAISE NOTICE '5️⃣⏩ direction 子表已存在，跳过';
+        RAISE NOTICE '5️⃣⏩ trade_direction 子表已存在，跳过';
     END IF;
 
     -- open_price 子表
     IF NOT EXISTS (SELECT 1 FROM information_schema.tables WHERE table_name = 'trade_open_price') THEN
-        CREATE TABLE open_price (
+        CREATE TABLE trade_open_price (
             id UUID DEFAULT gen_random_uuid() PRIMARY KEY,
-            trade_id UUID NOT NULL,
+            trade_id UUID NOT NULL REFERENCES trade(id) ON DELETE CASCADE,
             open_price NUMERIC(10,6) NOT NULL CHECK (open_price >= 0.00) DEFAULT 0.00,
             deleted BOOLEAN NOT NULL DEFAULT FALSE,
             created_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
             updated_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP
         );
-        CREATE TRIGGER update_open_price_updated_at
-            BEFORE UPDATE ON open_price
+        CREATE TRIGGER update_trade_open_price_updated_at
+            BEFORE UPDATE ON trade_open_price
             FOR EACH ROW EXECUTE FUNCTION update_data_modified_column();
-        RAISE NOTICE '6️⃣✅ open_price 子表已创建';
+        RAISE NOTICE '6️⃣✅ trade_open_price 子表已创建';
     ELSE
-        RAISE NOTICE '6️⃣⏩ open_price 子表已存在，跳过';
+        RAISE NOTICE '6️⃣⏩ trade_open_price 子表已存在，跳过';
     END IF;
 
     -- open_fee 子表
     IF NOT EXISTS (SELECT 1 FROM information_schema.tables WHERE table_name = 'trade_open_fee') THEN
-        CREATE TABLE open_fee (
+        CREATE TABLE trade_open_fee (
             id UUID DEFAULT gen_random_uuid() PRIMARY KEY,
-            trade_id UUID NOT NULL,
+            trade_id UUID NOT NULL REFERENCES trade(id) ON DELETE CASCADE,
             open_fee NUMERIC(10,6) NOT NULL CHECK (open_fee >= 0.00) DEFAULT 0.00,
             deleted BOOLEAN NOT NULL DEFAULT FALSE,
             created_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
             updated_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP
         );
-        CREATE TRIGGER update_open_fee_updated_at
-            BEFORE UPDATE ON open_fee
+        CREATE TRIGGER update_trade_open_fee_updated_at
+            BEFORE UPDATE ON trade_open_fee
             FOR EACH ROW EXECUTE FUNCTION update_data_modified_column();
-        RAISE NOTICE '7️⃣✅ open_fee 子表已创建';
+        RAISE NOTICE '7️⃣✅ trade_open_fee 子表已创建';
     ELSE
-        RAISE NOTICE '7️⃣⏩ open_fee 子表已存在，跳过';
+        RAISE NOTICE '7️⃣⏩ trade_open_fee 子表已存在，跳过';
     END IF;
 
     -- close_date 子表
     IF NOT EXISTS (SELECT 1 FROM information_schema.tables WHERE table_name = 'trade_close_date') THEN
-        CREATE TABLE close_date (
+        CREATE TABLE trade_close_date (
             id UUID DEFAULT gen_random_uuid() PRIMARY KEY,
-            trade_id UUID NOT NULL,
+            trade_id UUID NOT NULL REFERENCES trade(id) ON DELETE CASCADE,
             year INT NOT NULL DEFAULT 0,
             month INT NOT NULL DEFAULT 0,
             day INT NOT NULL DEFAULT 0,
@@ -152,55 +152,55 @@ BEGIN
             created_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
             updated_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP
         );
-        CREATE TRIGGER update_close_date_updated_at
-            BEFORE UPDATE ON close_date
+        CREATE TRIGGER update_trade_close_date_updated_at
+            BEFORE UPDATE ON trade_close_date
             FOR EACH ROW EXECUTE FUNCTION update_data_modified_column();
-        RAISE NOTICE '8️⃣✅ close_date 子表已创建';
+        RAISE NOTICE '8️⃣✅ trade_close_date 子表已创建';
     ELSE
-        RAISE NOTICE '8️⃣⏩ close_date 子表已存在，跳过';
+        RAISE NOTICE '8️⃣⏩ trade_close_date 子表已存在，跳过';
     END IF;
 
     -- close_price 子表
     IF NOT EXISTS (SELECT 1 FROM information_schema.tables WHERE table_name = 'trade_close_price') THEN
-        CREATE TABLE close_price (
+        CREATE TABLE trade_close_price (
             id UUID DEFAULT gen_random_uuid() PRIMARY KEY,
-            trade_id UUID NOT NULL,
+            trade_id UUID NOT NULL REFERENCES trade(id) ON DELETE CASCADE,
             close_price NUMERIC(10,6) NOT NULL CHECK (close_price >= 0.00) DEFAULT 0.00,
             deleted BOOLEAN NOT NULL DEFAULT FALSE,
             created_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
             updated_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP
         );
-        CREATE TRIGGER update_close_price_updated_at
-            BEFORE UPDATE ON close_price
+        CREATE TRIGGER update_trade_close_price_updated_at
+            BEFORE UPDATE ON trade_close_price
             FOR EACH ROW EXECUTE FUNCTION update_data_modified_column();
-        RAISE NOTICE '9️⃣✅ close_price 子表已创建';
+        RAISE NOTICE '9️⃣✅ trade_close_price 子表已创建';
     ELSE
-        RAISE NOTICE '9️⃣⏩ close_price 子表已存在，跳过';
+        RAISE NOTICE '9️⃣⏩ trade_close_price 子表已存在，跳过';
     END IF;
 
     -- close_fee 子表
     IF NOT EXISTS (SELECT 1 FROM information_schema.tables WHERE table_name = 'trade_close_fee') THEN
-        CREATE TABLE close_fee (
+        CREATE TABLE trade_close_fee (
             id UUID DEFAULT gen_random_uuid() PRIMARY KEY,
-            trade_id UUID NOT NULL,
+            trade_id UUID NOT NULL REFERENCES trade(id) ON DELETE CASCADE,
             close_fee NUMERIC(10,6) NOT NULL CHECK (close_fee >= 0.00) DEFAULT 0.00,
             deleted BOOLEAN NOT NULL DEFAULT FALSE,
             created_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
             updated_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP
         );
-        CREATE TRIGGER update_close_fee_updated_at
-            BEFORE UPDATE ON close_fee
+        CREATE TRIGGER update_trade_close_fee_updated_at
+            BEFORE UPDATE ON trade_close_fee
             FOR EACH ROW EXECUTE FUNCTION update_data_modified_column();
-        RAISE NOTICE '🔟✅ close_fee 子表已创建';
+        RAISE NOTICE '🔟✅ trade_close_fee 子表已创建';
     ELSE
-        RAISE NOTICE '🔟⏩ close_fee 子表已存在，跳过';
+        RAISE NOTICE '🔟⏩ trade_close_fee 子表已存在，跳过';
     END IF;
 
     -- profit 子表
     IF NOT EXISTS (SELECT 1 FROM information_schema.tables WHERE table_name = 'trade_profit') THEN
-        CREATE TABLE profit (
+        CREATE TABLE trade_profit (
             id UUID DEFAULT gen_random_uuid() PRIMARY KEY,
-            trade_id UUID NOT NULL,
+            trade_id UUID NOT NULL REFERENCES trade(id) ON DELETE CASCADE,
             variety_tick NUMERIC(12,6) NOT NULL DEFAULT 0.00,
             variety_tick_price NUMERIC(12,6) NOT NULL CHECK (variety_tick_price >= 0.00) DEFAULT 0.00,
             win_tick NUMERIC(12,6) NOT NULL DEFAULT 0.00,
@@ -211,12 +211,12 @@ BEGIN
             created_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
             updated_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP
         );
-        CREATE TRIGGER update_profit_updated_at
-            BEFORE UPDATE ON profit
+        CREATE TRIGGER update_trade_profit_updated_at
+            BEFORE UPDATE ON trade_profit
             FOR EACH ROW EXECUTE FUNCTION update_data_modified_column();
-        RAISE NOTICE '1️⃣1️⃣✅ profit 子表已创建';
+        RAISE NOTICE '1️⃣1️⃣✅ trade_profit 子表已创建';
     ELSE
-        RAISE NOTICE '1️⃣1️⃣⏩ profit 子表已存在，跳过';
+        RAISE NOTICE '1️⃣1️⃣⏩ trade_profit 子表已存在，跳过';
     END IF;
 END $$;
 
@@ -245,30 +245,32 @@ SELECT
     format_numeric_to_original(p.fee_cost) AS fee_cost,
     format_numeric_to_original(p.trade_win) AS trade_win
 FROM trade t
-LEFT JOIN remark r ON t.id = r.trade_id AND r.deleted = FALSE
-LEFT JOIN open_date od ON t.id = od.trade_id AND od.deleted = FALSE
-LEFT JOIN variety v ON t.id = v.trade_id AND v.deleted = FALSE
-LEFT JOIN direction d ON t.id = d.trade_id AND d.deleted = FALSE
-LEFT JOIN open_price op ON t.id = op.trade_id AND op.deleted = FALSE
-LEFT JOIN open_fee of ON t.id = of.trade_id AND of.deleted = FALSE
-LEFT JOIN close_date cd ON t.id = cd.trade_id AND cd.deleted = FALSE
-LEFT JOIN close_price cp ON t.id = cp.trade_id AND cp.deleted = FALSE
-LEFT JOIN close_fee cf ON t.id = cf.trade_id AND cf.deleted = FALSE
-LEFT JOIN profit p ON t.id = p.trade_id AND p.deleted = FALSE
+LEFT JOIN trade_remark r ON t.id = r.trade_id AND r.deleted = FALSE
+LEFT JOIN trade_open_date od ON t.id = od.trade_id AND od.deleted = FALSE
+LEFT JOIN trade_variety v ON t.id = v.trade_id AND v.deleted = FALSE
+LEFT JOIN trade_direction d ON t.id = d.trade_id AND d.deleted = FALSE
+LEFT JOIN trade_open_price op ON t.id = op.trade_id AND op.deleted = FALSE
+LEFT JOIN trade_open_fee of ON t.id = of.trade_id AND of.deleted = FALSE
+LEFT JOIN trade_close_date cd ON t.id = cd.trade_id AND cd.deleted = FALSE
+LEFT JOIN trade_close_price cp ON t.id = cp.trade_id AND cp.deleted = FALSE
+LEFT JOIN trade_close_fee cf ON t.id = cf.trade_id AND cf.deleted = FALSE
+LEFT JOIN trade_profit p ON t.id = p.trade_id AND p.deleted = FALSE
 WHERE t.deleted = FALSE;
 
 RAISE NOTICE '4️⃣✅ trade_info_view 已创建/更新';
 
 -- 5️⃣ 性能索引 ------------------------------------------------
-CREATE INDEX IF NOT EXISTS idx_remark_trade_id_deleted ON remark(trade_id, deleted);
-CREATE INDEX IF NOT EXISTS idx_open_date_trade_id_deleted ON open_date(trade_id, deleted);
-CREATE INDEX IF NOT EXISTS idx_variety_trade_id_deleted ON variety(trade_id, deleted);
-CREATE INDEX IF NOT EXISTS idx_direction_trade_id_deleted ON direction(trade_id, deleted);
-CREATE INDEX IF NOT EXISTS idx_open_price_trade_id_deleted ON open_price(trade_id, deleted);
-CREATE INDEX IF NOT EXISTS idx_open_fee_trade_id_deleted ON open_fee(trade_id, deleted);
-CREATE INDEX IF NOT EXISTS idx_close_date_trade_id_deleted ON close_date(trade_id, deleted);
-CREATE INDEX IF NOT EXISTS idx_close_price_trade_id_deleted ON close_price(trade_id, deleted);
-CREATE INDEX IF NOT EXISTS idx_close_fee_trade_id_deleted ON close_fee(trade_id, deleted);
+CREATE INDEX IF NOT EXISTS idx_trade_remark_trade_id_deleted ON trade_remark(trade_id, deleted);
+CREATE INDEX IF NOT EXISTS idx_trade_open_date_trade_id_deleted ON trade_open_date(trade_id, deleted);
+CREATE INDEX IF NOT EXISTS idx_trade_variety_trade_id_deleted ON trade_variety(trade_id, deleted);
+CREATE INDEX IF NOT EXISTS idx_trade_direction_trade_id_deleted ON trade_direction(trade_id, deleted);
+CREATE INDEX IF NOT EXISTS idx_trade_open_price_trade_id_deleted ON trade_open_price(trade_id, deleted);
+CREATE INDEX IF NOT EXISTS idx_trade_open_fee_trade_id_deleted ON trade_open_fee(trade_id, deleted);
+CREATE INDEX IF NOT EXISTS idx_trade_close_date_trade_id_deleted ON trade_close_date(trade_id, deleted);
+CREATE INDEX IF NOT EXISTS idx_trade_close_price_trade_id_deleted ON trade_close_price(trade_id, deleted);
+CREATE INDEX IF NOT EXISTS idx_trade_close_fee_trade_id_deleted ON trade_close_fee(trade_id, deleted);
+-- 🔍 补 profit 表索引
+CREATE INDEX IF NOT EXISTS idx_trade_profit_trade_id_deleted ON trade_profit(trade_id, deleted);
 
 RAISE NOTICE '5️⃣✅ 全部索引已确保存在';