環境：sql server2005個人版，在最後多表查詢時搞了好久，想想這個東東以後可能有用。先記下！
sql **
create
database test;
use test;
drop
table if exists addresses;
/*位址表*/
create
table addresses(
id int
primary
key identity,
address varchar(20) not
null,/*位址*/
zipcode int/*郵編*/
);
drop
table if exists family;
/*家庭表*/
create
table family(
id int
unique identity not
null,
name
varchar(20), /*家長名*/
address_id int
notnull, /*位址id*/
primary
key(id) ,
constraint family_address foreign
key(address_id) references addresses(id)
);
drop
table if exists person;
/*個人資訊表*/
create
table person(
id int
primary
key identity,
family_id int
notnull, /*家庭id*/
com_address_id int
notnull,/*公司位址id*/
name
varchar(20) not
null,/*姓名*/
*** varchar(5)not
null,/*性別*/
constraint person_family_address foreign
key(family_id) references family(id),
constraint person_complay foreign
key(com_address_id) references addresses(id)
) /*檢視個人家庭資訊*/
select person.name
as '姓名', person.*** as '性別',family.name
as '家長名',
addresses.address as '家庭住址' ,b.address as '公司位址'
from person,addresses,family,
(select addresses.id,addresses.address from person,addresses
where addresses.id=person.com_address_id)b
where
addresses.id=family.address_id and family.id=person.family_id
and person.com_address_id=b.id;
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