Question

我正在编写一个SQL脚本来从表中删除一些行。

我需要删除具有特定类型（简单）的行，其中估值时间戳是创建日期小于下午4点的当天的16:00。这有意义吗？

delete from cfo_daily_trans_hist where dh_dd_type_id = 'valuation' --and dh_val_time_stamp is today at 16:00 where the dh_create_dt is today at a time earlier than 16:00

我真的不知道进行确切日期比较的语法。

谢谢你们。

Answer 1

DELETE [dbo].[cfo_daily_trans_hist]
WHERE [dh_dd_type_id] = 'valuation' 
AND [dh_val_time_stamp] = DATEADD(HH, 16, CONVERT(DATETIME,CONVERT(DATE,GETDATE()))) -- is today at 16:00 
AND [the dh_create_dt] < DATEADD(HH, 16, CONVERT(DATETIME,CONVERT(DATE,GETDATE())))-- is today at a time earlier than 16:00

Answer 2

And dh_val_time_stamp = DateAdd(Hour, 16, DateAdd(Day, DateDiff(Day, 0, GetDate()), 0))
And dh_create_dt >= DateAdd(Day, DateDiff(Day, 0, GetDate()), 0)
And dh_create_dt < DateAdd(Hour, 16, DateAdd(Day, DateDiff(Day, 0, GetDate()), 0))

Answer 3

-- =================
-- sample data
-- =================
declare @t table
(
    dh_val_time_stamp datetime,
    dh_create_dt datetime
)

declare @d datetime
set @d = cast(cast(cast(getdate() as float) as int) as datetime)

insert into @t values (dateadd(hh, 16, @d), dateadd(hh, 14, @d))
insert into @t values (dateadd(hh, 1, @d), dateadd(hh, 2, @d))


-- =================
-- solution
-- =================
select 
    *
from @t t1
cross apply
(
    select d = dateadd(hh, 16, cast(cast(cast(getdate() as float) as int) as datetime))
) t2
where dh_val_time_stamp = d
and dh_create_dt < d

根据日期比较删除行 - sql

3 个答案: