quote:

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Originally posted by AndrewMurphy

index on MeasurementID, Timestamp

SQL timestamp field <> a date/time field. it's a random hash code.
you may wish to use a formal date column - which implicitly includes a time portion.

if you wish to use partitions, then partitioning on MeasurementID is valid, but the normal way would be to partition on dates.

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CREATE TABLE [dbo].[MeasurementTypes](
	[Id] [int] IDENTITY(1,1) NOT NULL,
	[Name] [nvarchar](50) NULL,
CONSTRAINT [PK_MeasurementTypes] PRIMARY KEY CLUSTERED 
(
	[Id] ASC
) WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
) ON [PRIMARY]

CREATE TABLE [dbo].[Measurements](
	[ID] [int] IDENTITY(1,1) NOT NULL,
	[Timestamp] [datetime] NULL,
	[MeasurementID] [int] NULL,
	[Value] [real] NULL,
CONSTRAINT [PK_Measurements] PRIMARY KEY CLUSTERED 
(
	[ID] ASC
) WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
) ON [PRIMARY]


CREATE NONCLUSTERED INDEX [IX_Measurements] ON [dbo].[Measurements] (
	[MeasurementID] ASC,
	[Timestamp] ASC
) WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, SORT_IN_TEMPDB = OFF, IGNORE_DUP_KEY = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]

ALTER TABLE [dbo].[Measurements]  WITH CHECK ADD  CONSTRAINT [FK_Measurements_MeasurementTypes] FOREIGN KEY([MeasurementID])
REFERENCES [dbo].[MeasurementTypes] ([Id])

ALTER TABLE [dbo].[Measurements] CHECK CONSTRAINT [FK_Measurements_MeasurementTypes]