我的教授告诉我，我的输出对于我必须创建的这个查询是不正确的。谁能指出为什么？也许他希望以不同的方式完成查询？我认为这个问题很简单。ERD，问题，查询和输出如下。任何帮助表示赞赏。谢谢
- 编写一个查询，显示在二级市场上交易超过 50000 股的所有交易。请包括交易编号、股票代码、交易公司名称、证券交易所代码、交易股票数量、总价格和货币代码。
输出：
88 TM Toyota Motors NYSE 50300 4099128.08 $
28 TM Toyota Motors NYSE 50300 4099128.08 $
88 TYO:6201 Toyota Motors NYSE 50300 4099128.08 $
28 TYO:6201 Toyota Motors NYSE 50300 4099128.08 $
71 NYT The New York Times NYSE 84000 1046892 $
11 NYT The New York Times NYSE 84000 1046892 $
78 BA British Airways LSE 72000 14711256 £
18 BA British Airways LSE 72000 14711256 £
SELECT
trade.trade_id,
stock_listing.stock_symbol,
company.name company_name,
stock_exchange.symbol AS stock_exchange_symbol,
trade.shares AS number_of_shares_traded,
trade.price_total,
currency.symbol currency_symbol
FROM trade
JOIN stock_listing
ON stock_listing.stock_id = trade.stock_id
JOIN company
ON company.stock_id = trade.stock_id
JOIN stock_exchange
ON stock_exchange.stock_ex_id = trade.stock_ex_id
JOIN currency
ON currency.currency_id = company.currency_id
WHERE trade.shares > 50000;
