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Published on 2010-04-11T13:24:23Z
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2010/04/11
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what are the uses of the different join operations in sql? Like i want to know why do we need the different inner and outer joins?
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Here is the query:
INSERT INTO @TempTable
SELECT UserID,
Name,
Address1 =
(SELECT TOP 1 [Address] FROM
(SELECT TOP 1 [Address] FROM [UserAddress] ua INNER JOIN UserAddressOrder uo ON ua.UserID = uo.UserID WHERE ua.UserID = u.UserID
ORDER BY uo.AddressOrder ASC) q
ORDER BY AddressOrder…
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What is the best way of handling many-to-many relations in a RDBMS database like mySQL?
Have tried using a pivot table to keep track of the relationships, but it leads to either one of the following:
Normalization gets left behind
Columns that is empty or null
What approach have you taken in…
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Since there are a few already proven…
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I was always taught to strive for the highest Normal Form of database normalization, and we were taught Bernstein's Synthesis algorithm to achieve 3NF. This is all very well and it feels nice to normalize your database, knowing that fields can be modified while retaining consistency.
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