php mysql 4 tables join

Question

I have 4 tables, in table's 'tbl_Order' has single record of each cusotmer. in table's 'tbl_OrderDetail' there are more then 1 Services (records) of each customer. in table's 'tbl_services' there are more then 10 pre-define services. inch table's 'tbl_users' there are customer's basic information.

my question is : how I can fetch data by each customer using PHP with MySql. My tables details are below:

tbl_Order:   Order_ID,Order_Type,Order_Date,Time,Customer_ID,Booking_Type,Booking_Status,Order_No,Car_No,Booking_Date

tbl_OrderDetail: ID,Order_ID,Service_ID     

tbl_services :  Service_ID,S_Name,S_Price

tbl_users : Customer_ID ,User_Name

Answer 1

您可以使用一个表的主键与另一个表的外键联接四个表，并且在查询的处仅使用User_Name的顺序

Answer 2

select *
from
    tbl_Order a
        inner join
    tbl_OrderDetail b
        on a.Order_ID = b.Order_ID
        inner join 
    tbl_services  c
        on b.Service_ID = c.Service_ID
    tbl_users  d
        on d.Customer_ID = c.Customer_ID

I would advice you to select the columns you want instead of using * . EG : a.Order_ID, b.Service_ID

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