DBA

Database Administration


T-SQL: Change Tracking Retention Period – How Long the Changes are Kept?

As we mentioned in Change Tracking – What is this and how it works, the retention period is the one that determines how long the changes are kept. Create database:

Enable Change Tracking on Database Level:

After the Change Tracking is enabled on database level, we can edit its […]

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T-SQL: Change Tracking – What is this and how it works

Change tracking was introduced in SQL Server 2008. This is a tool that keeps the fact that there are changes in tracked tables for a specified period of time. It doesn’t show what the changes are, it tells that a data has been changed. It answers if a change has been […]

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T-SQL: (Migration) Export the definition of Stored Procedures

Very often we need to bulk export database objects and move them to another server. Manually we do this by right click on the database –> Tasks –> Generate Scripts… In this example I show how we can export Stored Procedures with T-SQL and SQLCMD. This model gives us the […]

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T-SQL: NVARCHAR(255) vs. NVARCHAR(MAX) Disk Space Comparison

In some scenarios like ETL or load data into a DB, we need to insert the data into a staging table, where all the columns are String data type and on the next step to cleanse and manipulate the data. I heard a discussion about the data type of the […]

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