SQL系列学习 存储过程&事物语法

 /*学习事物基本语法*/

 /*增加课室名的唯一索引*/
 ALTER table class add constraint uni_ClassName unique(name)

 /*创建存储过程，其中增加教师，并增加课室*/
 CREATE proc pro_AddClass
 @className varchar(50),
 @teacherName varchar(50)
 as
 begin
 declare @teacherid int
 select @teacherid=id from teacher a where a.name=@teachername

 begin tran
 IF(@teacherid=0 or @teacherid is null)
 begin
 insert into teacher(name) VALUES(@teachername)
 select @teacherid=IDENT_CURRENT('teacher')
 end

 insert into class(teacherid,name) VALUES(@teacherid,@classname)

 IF @@error<>0
 begin
 rollback tran
 end
 else
 commit tran
 end

 /*执行存储过程，查看结果*/
 exec pro_AddClass 'Soft','Teacher Li'

 exec pro_AddClass 'Math','Teacher Ann'

主要还是记录自己学习的过程，这些基础的知识相信园内已经有很多分享，参考了各位的资料，再作为自学的记录而已，如有差错，请指正