Retrieving normalized data

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I have a sells tables that stores every sell operation
i know that it's not good to store every sell data row and give it the product name or client name as strings, that will use large data size
i've to store the sell operation with the client id as int
but what to do when retrieveing data by select query?
it returns the client id's but i need a query to returns client name as it stored in clients table
what is the best query to do that?

What I have tried:

is that join statements or union or what?
after 1 year(for example) there will be a huge number of rows related to clients and product names by id
what statement should i use to handle that huge number of rows?

Posted 16-May-17 8:34am

XRushdy

Updated 16-May-17 9:43am

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[no name] 16-May-17 14:48pm

SELECT
SELLS.X,
SELLS.Y,
SELLS.Z,
CLIENT.ID,
CLIENT.NAME
FROM SELLS
LEFT JOIN CLIENT ON CLIENT.ID = SELLS.CLIENT_ID
WHERE ...

Maciej Los 16-May-17 15:30pm

We cannot read in your mind or direct from your screen. You have to provide more details...

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Maciej Los · Answer 1 · 2017-05-16T09:43:00

Please, read the comments to the question first.

I'd suggest to start with basics: Tutorial: Writing Transact-SQL Statements | Microsoft Docs[^]

As Bruno (0x01AA[^]) mentioned in the comment to the question, to fetch data, you have to use SELECT statement[^]. You can "link" 2 tables by using joins[^], see: Visual Representation of SQL Joins[^]

So, an example SELECT statement can look like this:

SQL

SELECT so.OperationId, so.Stuff, so.ClientId, ci.ClientName
FROM SellOperation AS so INNER JOIN Clients AS ci ON so.ClientId = ci.ClientId
WHERE so.ClientId = @ClientId

Good luck!