在ORACLE和sql server中简单备份table的方法
如果temp_t1不存在,
oracle:
create table temp_t1
as
select * from t1
sql server:
select * into temp_t1 from t1
如果temp_t1存在,
oracle:
insert into table temp_t1
select * from t1
sql server:
insert into table temp_t1
select * from t1
相关文档:
oracle表空间操作详解
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3作者: 来源: 更新日期:2006-01-04
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7建立表空间
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9CREATE TABLESPACE data01
10DATAFILE '/ora ......
查询:select语句,多表查询,group by 分组,having 对分组后的每一个组进行过滤,order by 排序。(select语句多表查询这个最重要)
DML语句:insert into emp() values(),insert into emp (select * from emp2),
delete from emp where...
update emp set sal =.. where ..
rollback;恢复 ......
//取出源数据
select groupname,totalnum,inputdate,groupid into #temp from
(select count(*)as totalnum,p.groupid,g.groupname,convert(nvarchar(10),inputdate,120) as 'inputdate'
from person p left join admin_group g on p.groupid = g.groupid and deleteflag = '0'
where p.inactive=' ......
这里介绍sql server2005里面的一个使用实例:
CREATE TABLE tb(province nvarchar(10),city nvarchar(10),score int)
INSERT tb SELECT '陕西','西安',3
UNION ALL SELECT '陕西','安康',4
UNION ALL SELECT '陕西','汉中',2
UNION ALL SELECT '广东','广州',5
UNION ALL SELECT '广东','珠海',2
UNION ......
drop table #t
create table #t(req_spid int,obj_name sysname)
declare @s nvarchar(4000)
,@rid int,@dbname sysname,@id int,@objname sysnam ......