MySQL Query LEFT JOIN 5表

php
mysql

2015-10-19 116 views -5 likes

-5

我试图根据使用USER ID作为4和公司ID为4来拉3个电话簿。我目前的查询似乎是拉他们几次。我怎样才能得到它只拉一次记录？MySQL Query LEFT JOIN 5表

SELECT 
    users.ID, 
    ownership_company_managers.*, 
    company_user.*, 
    phonebook_list.*, 
    ownership_phonebook.* 
FROM users LEFT JOIN 
(
    phonebook_list, ownership_phonebook, ownership_company_managers, company_user) ON (
    users.ID=ownership_company_managers.USER_ID 
    AND ownership_company_managers.USER_ID=ownership_company_managers.COMPANY_ID 
    AND ownership_company_managers.COMPANY_ID=company_user.COMPANY_ID 
    AND company_user.USER_ID=company_user.COMPANY_ID 
) 
WHERE users.ID='4'

来源

2015-10-19 Frank Thornton

为什么图片而不只是文字 – Drew

图片更容易 –

我想不把一个sqlfiddle放在一起更容易:) – Drew

回答

SELECT users.ID, ownership_company_managers.*, company_user.*, 
     phonebook_list.*, ownership_phonebook.* 

FROM users 
LEFT JOIN phonebook_list ON users.ID = ownership_company_managers.USER_ID 
LEFT JOIN ownership_phonebook ON ... , 
LEFT JOIN ... 
LEFT JOIN ... 

WHERE users.ID='4'

来源

2015-10-19 06:21:21

MySQL Query LEFT JOIN 5表

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