Sysbase 中判断某表是否存在（表所对应的烦(ch��)引名是否存在的判断方法）(j��)

MikyTan — Mon, 20 Jul 2009 13:14:00 GMT

今天在写动态徏表及(qi��ng)表所对应的烦(ch��)引时�Q�需要判断表�?qi��ng)�?ch��)引是否存在。现记录如下。�?br />
判断表是否存�?br />

select id,name from sysobjects where type='U' and name='Airbook';

其中 Airbook是所需要创建的表名。�?br />
判断表所对应的烦(ch��)引名是否存在

select sysobjects.id,sysobjects.name ,sysindexes.name
from sysobjects,sysindexes
where sysobjects.id = sysindexes.id  and
      sysobjects.type='U'
        and sysobjects.name='Airbook'
        and sysindexes.name='in_abksaleid'
;

其中 Airbook是指表名�Q?in_abksaleid 是指所建的索引名�?br />
查询表中的某个字�D�|��否存�?br />

select sysobjects.id,sysobjects.name ,syscolumns.name
from sysobjects,syscolumns
where sysobjects.id = syscolumns.id  and
      sysobjects.type='U'
        and sysobjects.name='Airbook'
        and syscolumns.name='Agent_ID'
;

其中Airbook是指表名�Q�Agent_ID为Airbook的字�D?

MikyTan 2009-07-20 21:14 发表评论

产品旉��D?StartDate,EndDate)SQL查询

MikyTan — Thu, 23 Apr 2009 12:50:00 GMT

�?a 字段,id,开始时�?�l�束旉��,��h��
1,2008-01-01,2008-09-10,220.0
2,2008-09-11,2008-09-30,280.0
3,2008-10-01,2008-10-10,320.0
3,2008-10-11,2008-12-31,350.0

输入一个开始时�?一个结束时�?�q�回�q�段旉��内每天的��h��,最好返回每天的日期和对应的��h��
例输入开始时�?008-09-09,�l�束旉��2008-09-13
�q�回
2008-09-09,220
2008-09-10,220
2008-09-11,280
2008-09-12,280
2008-09-13,280

�Ҏ(gu��)��一�Q�采用存储过�E�的�Ҏ(gu��)��!

create table T([id] int,[开始时�?/span>] datetime,[�l�束旉��] datetime,[��h��] numeric(4,1))
insert into T
select 1,'2008-01-01','2008-09-10',220.0 union all
select 2,'2008-09-11','2008-09-30',280.0 union all
select 3,'2008-10-01','2008-10-10',320.0 union all
select 3,'2008-10-13','2008-12-31',350.0

select * from T
go
--Code
create procedure GetTimePrice(@begintime datetime,@endtime datetime)
as
declare @tmptime datetime
declare @tmp table (dt datetime,price numeric(4,1))--�l�果�?/span>
begin
set @tmptime=@begintime
while @tmptime<=@endtime
begin

insert into @tmp
select @tmptime,��h�� from t where @tmptime between 开始时�?nbsp;and �l�束旉��
set @tmptime=DATEADD(dd,1,@tmptime)
end
select * from @tmp
end
go

exec GetTimePrice '2008-09-09','2008-09-14'--执行
--Drop
drop table T
drop procedure GetTimePrice

�Ҏ(gu��)��二：(x��)采用Case�Ҏ(gu��)��

set nocount on
create table T([id] int,[开始时�?/span>] datetime,[�l�束旉��] datetime,[��h��] numeric(4,1))
insert into T
select 1,'2008-01-01','2008-09-10',220.0 union all
select 2,'2008-09-11','2008-09-30',280.0 union all
select 3,'2008-10-01','2008-10-10',320.0 union all
select 3,'2008-10-11','2008-12-31',350.0

declare @bgnTime datetime set @bgnTime = '2008-09-09'
declare @endTime datetime set @endTime = '2008-09-13'
select id
    ,case when [开始时�?/span>]<@bgnTime then @bgnTime else [开始时�?/span>] end as [开始时�?/span>] -- 让输出结果更贴近参数表现出来
    ,case when [�l�束旉��]>@endTime then @endTime else [�l�束旉��] end as [�l�束旉��] -- 让输出结果更贴近参数表现出来
    ,[��h��]
from T
where [开始时�?/span>]<@endTime
and [�l�束旉��]>@bgnTime
-- id,开始时�?�l�束旉��
-- 1,2008-09-09 00:00:00.000,2008-09-10 00:00:00.000
-- 2,2008-09-11 00:00:00.000,2008-09-13 00:00:00.000

drop table T

id          开始时�?nbsp;                                                  �l�束旉��                                                   ��h��
----------- ------------------------------------------------------ ------------------------------------------------------ ------
1           2008-09-09 00:00:00.000                                2008-09-10 00:00:00.000                                220.0
2           2008-09-11 00:00:00.000                                2008-09-13 00:00:00.000                                280.0

MikyTan 2009-04-23 20:50 发表评论

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Sysbase 中判断某表是否存在（表所对应的烦(ch��)引名是否存在的判断方法）(j��)

产品旉����D?StartDate,EndDate)SQL查询

产品旉��D?StartDate,EndDate)SQL查询