如何在mysql中连接三个或更多表

如何在mysql中连接三个或更多表,mysql,Mysql,我有三个表,我想从中检索值,我使用下面的查询,这给了我错误,有人能告诉我出了什么问题吗 SELECT a.VISITOR_TEXT,a.COMPANY_TEXT,a.CONTACT,a.PERSON_TO_MEET,a.DEPARTMENT_TEXT,a.FLOOR,b.BELONGING_T YPE,b.BELONGING_TEXT ,a.INTIME, c.EXIT_TIME FROM tm_visitor a LEFT JOIN tm_belonging b , tm_exit c ON

我有三个表,我想从中检索值,我使用下面的查询,这给了我错误,有人能告诉我出了什么问题吗

SELECT a.VISITOR_TEXT,a.COMPANY_TEXT,a.CONTACT,a.PERSON_TO_MEET,a.DEPARTMENT_TEXT,a.FLOOR,b.BELONGING_T
YPE,b.BELONGING_TEXT ,a.INTIME, c.EXIT_TIME FROM tm_visitor a  LEFT JOIN tm_belonging b , tm_exit c ON a.ID=b.
BID AND a.ID=c.ID;

这就是您正在寻找的:

SELECT  a.VISITOR_TEXT,
        a.COMPANY_TEXT,
        a.CONTACT,
        a.PERSON_TO_MEET,
        a.DEPARTMENT_TEXT,
        a.FLOOR,
        b.BELONGING_TYPE,
        b.BELONGING_TEXT,
        a.INTIME,
        c.EXIT_TIME 
FROM    tm_visitor a  
        LEFT JOIN tm_belonging b ON b.BID = a.id
        LEFT JOIN tm_exit c ON c.ID = a.ID

不能将
与联接语法一起使用。仅在from语法中。使用

SELECT  a.VISITOR_TEXT, a.COMPANY_TEXT,a.CONTACT, a.PERSON_TO_MEET,a.DEPARTMENT_TEXT, a.FLOOR,b.BELONGING_TYPE,b.BELONGING_TEXT, a.INTIME, c.EXIT_TIME 
FROM tm_visitor a  
LEFT JOIN tm_belonging b  ON a.ID=b.BID
left join tm_exit c ON a.ID=c.ID

@jcho360:我什么时候没有对帮助我的ppl表示感谢,我也表示了感谢,并接受了提供给我的答案
SELECT  a.VISITOR_TEXT, a.COMPANY_TEXT,a.CONTACT, a.PERSON_TO_MEET,a.DEPARTMENT_TEXT, a.FLOOR,b.BELONGING_TYPE,b.BELONGING_TEXT, a.INTIME, c.EXIT_TIME 
FROM tm_visitor a  
LEFT JOIN tm_belonging b  ON a.ID=b.BID
left join tm_exit c ON a.ID=c.ID