Question

我的数据库包含几个查找表（在UI表单中显示为下拉菜单）。

例如，

customer_data - 客户人口统计信息。

lookup_car - 存储汽车描述（Pinto，Vega，Reliant Robin，Mustang，Corvette）

junction_car_customer - 将客户与一辆或多辆汽车相结合

客户Jeremy Clarkson（cust_id：1）拥有三辆车。他的记录下拉列表显示：

Pinto (car_id=100)
Reliant Robin (car_id=101)
Vega (car_id=102)

junction_car_customer数据如下所示：

cust_id    car_id
1          100
1          101
1          102

我正在尝试返回显示客户名称和所拥有模型的行。

这是我的疑问：

SELECT 
 cd.cust_id,
 cd.name_first,
 cd.name_last,
 jcc.car_id,
 lc.car_desc
FROM
 customer_data AS cd
 LEFT JOIN ju_cust_car AS jcc ON jcc.cust_id = cd.cust_id
 LEFT JOIN lookup_cars AS lc ON lc.car_id = jcc.car_id

ORDER BY 
 cd.name_last

我得到了：

查询表达式'jcc.cust_id =中的语法错误（缺少运算符） cd.cust_id LEFT JOIN lookup_cars AS lc ON lc.car_id = jcc.car_id'

导致此错误的原因是什么？

Answer 1

Access需要多个连接的括号。例如：

select * 
from ((Table1 as t1)
left join Table2 as t2 on t1.id = t2.id)
left join Table3 as t3 on t1.id = t3.id

Answer 2

访问对LEFT / RIGHT JOIN和括号有点挑剔。试试这个

SELECT 
    cd.cust_id,
    cd.name_first,
    cd.name_last,
    jcc.car_id,
    lc.car_desc
FROM
    (
        customer_data AS cd
        LEFT JOIN 
        ju_cust_car AS jcc 
            ON jcc.cust_id = cd.cust_id
    )
    LEFT JOIN lookup_cars AS lc 
        ON lc.car_id = jcc.car_id
ORDER BY 
 cd.name_last

尝试加入Access时出现语法错误

2 个答案: