How do you do SQL versioning?

How do you do SQL versioning?

7 Answers

1. You have a separate table that mimics the original table + a date/time column for the date it was changed. Whenever a record is updated, you insert the existing contents into the history table just prior to the update.
2. You have a separate warehouse database.

Can you use SQL for statistics?

If you wonder whether you can perform statistical analysis in SQL, the answer is ‘yes’. Read my article to learn how to do this!

How often should statistics be updated in SQL Server?

This means the statistics will be updated every 44,721 modifications. In SQL Server 2008 R2 through SQL Server 2014 (12.x), or in SQL Server 2016 (13.x) and later under database compatibility level 120 and lower, enable trace flag 2371 so that SQL Server uses a decreasing, dynamic statistics update threshold.

How to handle versioning in a SQL table?

Idea number 2:Keep an archive table and a main table. Before updating the main table, insert the row I’m about to overwrite into archive table, and use the main table as I normally would as if I wasn’t concerned about versioning.

What do you need to know about versioning data?

Typically, for versioning or storing historical data you do one of two (or both) things. You have a separate table that mimics the original table + a date/time column for the date it was changed. Whenever a record is updated, you insert the existing contents into the history table just prior to the update.

Why are my SQL server statistics out of date?

Due to these operations, statistics might be out of date, and it might cause issues with the query optimizer efficiency. By default, the SQL Server database has an option Auto Update Statistics true. With this Auto Update Statistics option, query optimizer updates the SQL Server update statistics when the statistics are out of date.