Elven Soft Blog » Puiu

The server principal is not able to access the database under the current security context

Puiu — Thu, 22 Jul 2010 13:24:21 +0000

If this error message appears when trying to expand the databases node in SQL Server Management Studio and the x64 version of SQL Server 2008 is installed, follow the steps below:

1) Bring Object Explorer Details window by selecting View –> Object Explorer Details in menu (or hitting F7)
2) In Object Explorer window click at Databases folder
3) In Object Explorer Details window right-click at the column header and deselect Collation
4) Refresh Databases folder.

For more details click here.

Unpivot transformation

Puiu — Tue, 04 May 2010 18:05:10 +0000

We have the following excel file that has a pivot table in it:

The first column represents the age (A) while in the columns starting from B to D is the pivoted data. The column names are 10, 11 and 12. In order for SSIS to recognize the numbers as column names you must put a ” ‘ ” in front of the number, like this: ‘10.

Next we open SSIS and create a new project. We add a Data Flow task and in the data flow area we add an Excel source and a unpivot transformation like below:

The red x appears because we have not edited the transformation yet. Let’s do that:

In the Available Input Columns we do not check the columns that we want to remain unchanged. Here we do not want the first column, “Age”, to be changed (unpivoted).

The destination column in the table reprezents the new column where the pivoted values will be stored.

The pivot key column name is the column where the name of the columns will be stored, in our case 10, 11, 12.

After we’ve done all this we can have another excel file or table as a destination for our results.

Cheers!

Filter tables and matrix in reporting services

Puiu — Tue, 22 Dec 2009 10:45:00 +0000

When filtering a table or a matrix in reporting services you might encounter the following error:

Cannot compare data types of System.Int32 and System.String. Please check the data type returned by the filter expression.

This happens when the column to be filtered is of type numeric (integer in our case) and you try to compare it with a number. The correct way to do it is like in the picture below:

In the value field put another “=” sign otherwise the number will be interpreted as a string and not as a number.