How do I get the earlist DateTime of a set, where there is a few conditions
- by radbyx
Create script for Product
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
SET ANSI_PADDING ON
GO
CREATE TABLE [dbo].[Product](
[ProductID] [int] IDENTITY(1,1) NOT NULL,
[ProductName] [varchar](50) NOT NULL,
CONSTRAINT [PK_Products] PRIMARY KEY CLUSTERED
(
[ProductID] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
GO
SET ANSI_PADDING OFF
GO
Create script for StateLog
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[StateLog](
[StateLogID] [int] IDENTITY(1,1) NOT NULL,
[ProductID] [int] NOT NULL,
[Status] [bit] NOT NULL,
[TimeStamp] [datetime] NOT NULL,
CONSTRAINT [PK_Uptime] PRIMARY KEY CLUSTERED
(
[StateLogID] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
GO
ALTER TABLE [dbo].[StateLog] WITH CHECK ADD CONSTRAINT [FK_Uptime_Products] FOREIGN KEY([ProductID])
REFERENCES [dbo].[Product] ([ProductID])
GO
ALTER TABLE [dbo].[StateLog] CHECK CONSTRAINT [FK_Uptime_Products]
GO
I have this and it's not enough:
select top 5 [ProductName], [TimeStamp]
from [Product]
inner join StateLog on [Product].ProductID = [StateLog].ProductID
where [Status] = 0 order by TimeStamp desc;
(My query givess the 5 lastest TimeStamp's where Status is 0(false).)
But I need a thing more:
Where there is a set of lastest TimeStamps for a product where Status is 0, i only want the earlist of them (not the lastet).
Example:
Let's say for Product X i have:
TimeStamp1(status = 0) TimeStamp2(status = 1) TimeStamp3(status = 0) TimeStamp4(status = 0) TimeStamp5(status = 1) TimeStamp6(status = 0) TimeStamp7(status = 0) TimeStamp8(status = 0)
Correct answer would then be::
TimeStamp6, because it's the first of the lastest timestamps.
