add trading state

examples/examples.sql

@@ -11,4 +11,17 @@ create table if not exists user_account(
   key(update_time)
 );
 
-insert into user_account (user_id, balance) values (1, 10000), (2, 10000) on DUPLICATE KEY UPDATE balance=values (balance);
+insert into user_account (user_id, balance) values (1, 10000), (2, 10000) on DUPLICATE KEY UPDATE balance=values (balance);
+
+drop table if exists user_account_trading;
+create table if not exists user_account_trading( -- 表示交易中被冻结的金额
+  id int(11) PRIMARY KEY AUTO_INCREMENT,
+  user_id int(11) UNIQUE ,
+  frozen DECIMAL(10, 2) not null default '0',
+  create_time datetime DEFAULT now(),
+  update_time datetime DEFAULT now(),
+  key(create_time),
+  key(update_time)
+);
+
+insert into user_account_trading (user_id, balance) values (1, 0), (2, 0) on DUPLICATE KEY UPDATE balance=values (balance);