例子1.
create table profession
( id int not null identity primary key, profession varchar(20) )insert into profession (profession)
select profession from my_contacts group by profession order by profession本文共 251 字，大约阅读时间需要 1 分钟。
例子1.
create table profession
( id int not null identity primary key, profession varchar(20) )insert into profession (profession)
select profession from my_contacts group by profession order by profession转载于:https://blog.51cto.com/kaixinbuliao/881363