If a table has Hundreds of millions data,how to do grouping operation in SQL Server 2008?
who can gave me some suggestion?
thanks!
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If a table has Hundreds of millions data,how to do grouping operation in SQL Server 2008?
who can gave me some suggestion?
thanks!
Misunderstandings.
Hundreds of millions = small. I know a table we work on my probject tha gros around 60 million per day, and I have a data set that gros 600 million entries per day.
SQL has grouping operations, you know.
Now, you state “entity framework” as tag. Hereis the deal: you do not use business objects for groups as groups have no functionality anyway and are pure read only projections.
Go SQL (either direct or with a capable LINQ provider). GROUP BY is a SQL Command you may want to read up on.
If oyu need repeatable read, then a materialized view on the server may work, or inserting the data into another table for fast access. Depends a lot on the usage pattern. And make sure you actually have hardware capable enough for your required usage (which I agree many people will never understand). Given proper hardware (Exadata shines here, but it start i thin kat a quarter million USD or so per cluster) you can pull of billion row aggregations in nearly real time.