MYSQL QUERY LEFT JOIN;

Question

SQL丢失我查询的第一行

这是我的查询

$strSQL = "SELECT * FROM bill  LEFT JOIN bstock on bstock.Buy_Stock_ID = bill.Buy_Stock_ID
LEFT JOIN product on product.Product_ID = bstock.Product_ID
LEFT JOIN customer on customer.Customer_ID = bstock.Customer_ID WHERE Bill_ID = $Bill_ID";