Author: Soheil Bakhshi

Administartion, SQL Server, T-SQL

How to query extended properties

If you are working in a company that your managers are getting database documentation seriously, thumbs up! One of the ways to write useful documentation that is really effective is using SQL Server extended properties.

We can add extended properties to almost all SQL Server objects by right clicking on the object-> select properties-> select “Extended Properties” and add new properties to the object.

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So, after adding the new properties we might need to query those properties in the future.

Executing the following T-SQL script retrieves what we need:

select O.name ObjectName, e.name PropertyName, value

from sys.extended_properties e inner join sys.objects o on e.major_id=o.object_id

 

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All done!

T-SQL

How to create schema dynamically using dynamic SQL

In this short post I’ll show you how to create database schema using dynamic SQL.

It’s easy, just take a look at the following code:

declare @SchemaName varchar(max)

set @SchemaName = ‘YOUR_SCHEMA_NAME’

if not exists (select 0 from sys.schemas where name=@SchemaName)

exec(‘create schema [‘+@SchemaName+‘]’)

go

 

Enjoy!

Business Intelligence - BI, Data Warehousing - DW, SQL Server Management Studio - SSMS, T-SQL

Digging into SQL Server 2012 columnstore index

The SQL Server 11.0 release (code named “Denali”) introduces a new data warehouse query acceleration feature based on a new type of index called the columnstore. Columnstore indexing is officially announced in SQL Server 2012. It is working based on xVelocity memory optimised technology and it improves data warehouse query performance significantly. Due to the fact that data warehousing, decision support systems and business intelligence applications are growing very quickly, we need to be able to read and process very large data sets quickly and accurately into useful information and knowledge. Columnstore index technology is especially appropriate for data warehousing data sets. It improves the common data warehousing queries’ performance significantly.

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Business Intelligence - BI, SQL Server Integration Services - SSIS

How to send more precise SSIS logs (errors) through email

First of all you need to read my previous article called “How to send SSIS logs (errors) through email” as the processes are pretty the same. However, you need to create some changes in the Execute SQL Task (ref.: section “J” number 5 and 12 of “How to send SSIS logs (errors) through email”). As an Execute SQL Task is used to collect the logs stored in SQL Server you need to be familiar with parameter mapping in Execute SQL task and know how it works. Assume that we need to just send the “Error” logs that are happened between “Event Handler Start Time” and the current time for the current package execution. As you can imagine it is slightly different from what we did in the previous article to email the SSIS logs to the system administrators. As there was just one system variable that we mapped in parameter mapping section in the Execute SQL Task. But, here we need to have one more system variable mapped to a parameter. Please note that we are using OLEDB connection to connect to the SSIS log database that we created before to store SSIS logs. So there are some important points with OLEDB Connection and Execute SQL Task parameter mapping and its SQL statement.

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