Question

我编写了一个SQL查询来更新“ tbl_products”的数据。这是查询

update tbl_products 
set product_count = (product_count - tbl_order_details.product_sales_quantity) 
from tbl_products 
join tbl_order_details on tbl_order_details.product_id = tbl_products.product_id 
join tbl_order on tbl_order.order_id = tbl_order_details.order_id 
where tbl_order.order_id = 54;

但这给了我以下错误 “＃1064-您的SQL语法有误；请在与您的MariaDB服务器版本相对应的手册中找到正确的语法，以在第1行的'from tbl_products join tbl_order_details on tbl_order_details.product_id = tbl_p'附近使用”

这是怎么了？

Answer 1

在MySQL中，正确的语法是：

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
    <session-factory>
        <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
        <property name="hibernate.show_sql">true</property>
        <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
    </session-factory>
</hibernate-configuration>

正确的语法是什么？

1 个答案: