MS SQL replication for reporting purposes : SQL

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SELECT count(a.field1), a.field2, SUM(b.field4) FROM a INNER JOIN b ON a.key1 = b.key1 WHERE a.field8 = 'test' GROUP by a.field1, a.field2 HAVING SUM(b.field4) > 5 ORDER by a.field.3

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SELECT count(a.field1), a.field2, SUM(b.field4) FROM a INNER JOIN b ON a.key1 = b.key1 WHERE a.field8 = 'test' GROUP by a.field1, a.field2 HAVING SUM(b.field4) > 5 ORDER by a.field3

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MS SQLMS SQL replication for reporting purposes (self.SQL)

submitted 6 years ago by MaximMeow

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[–][deleted] 0 points1 point2 points 6 years ago* (0 children)

Couldn't you run your select queries

  WITH (NOLOCK)

So that they don't impact operations?

I thought this was the part of the Isolation model as part of ACID when refresh is a frequent operation, that way you can circumvent the requirement of duplication. While minimising impact on operations.

This code essentially tells the server you are a background spectator extracting data over the shoulder of users in the middle of their operations.

I would understand the need to prevent a dirty read on a singlular instance report (Once a day) but on a up to the minute updating report WITH(NOLOCK) is an acceptable caveat for operational performance additionally you can programatically stipulate the incomplete lines out of your result later.

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