如何将多个表连接在一起

Question

我正在尝试将多个表连接在一起，但我似乎无法正确使用它。我得到的错误是：

#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '.egr_name = egr.name
            JOIN dirEgr
                dirEgr' at line 4

我拥有的SQL sintax是以下

SELECT egr.*, carEgr.*, dirEgr.*, egrEmp.*, emp.*, boss.*, asoci.*, snip.*, pro.*
            FROM egr 
            JOIN carEgr
                carEgr.egr_name = egr.name
            JOIN dirEgr
                dirEgr.egr_name = egr.name
            JOIN egrEmp
                egrEmp.egr_name = egr.name
            JOIN emp
                emp.idEmp = egrEmp.emp_idEmp
            JOIN boss
                boss.emp_idEmp = emp.idEmp
            JOIN asosi
                asoci.egr_name = egr.name
            JOIN snip
                snip.egr_name = egr.name
            JOIN pro
                pro.egr_name = egr.name

除了emp和boss之外，

egr_name是大多数表的主键。另外，如何将boss连接到egr表或egr_name主键？我的表是：

egr
name

carEgr
egr_name //primary foreign key from egr table
idCarEgr //primary key
nameCarEgr

dirEgr
idDirEgr //primary key
egr_name //primary foreign key from egr table
nameDirEgr

egrEmp
emp_idEmp //primary key
egr_name //primary foreign key from egr table
nameEmp

emp
idEmp //primary key
nameEmp

boss
idBoss //primary key
emp_idEmp //primary foreign key from emp table
nameBoss

snip
idSNIP //primary key
egr_name //primary foreign key from egr table
nameSNIP

asoci
idAsoci //primary key
egr_name //primary foreign key from egr table
nameAsoci

pro
idPro //primary key
egr_name //primary foreign key from egr table
namePro

Answer 1

您缺少git stash pop

的ON条款

JOINS

Answer 2

egrEmp.egr_name = egresado.name

egresado的参考在哪里。这没有定义。除了以上评论之外，请更改此设置并运行您的查询。