Changing Default Database File Locations in SQL

I missed to specify the default location for the data file and the log file while installing SQL SERVER . So when I created a database and did not specify the default location for the files it will be created on the location defined in the server settings. So if we want  always the data files and log files to be created on a particular location we can
change the server properties through SSMS - > Database Settings -> Database default locations .

However this requires the sql instance to be restarted for the changes to take effect.

How to export data from database tables to an XML file using SSIS

I had a project where I had to generate a xml file with data from database tables using SSIS.

The components involved were

Data Flow Task
OLE DB Source - which had the SQL command at the stored proc that called the XML data
Flat File Destination  that used a Flat File Connection Manager.

The important thing to remember here was the  FFCM set up .
Here are the screen shots to show I set it up .

The DFT consisted of OLEDB Sour Editor calling a procedure that generated XML data.

Below is the Flat File Connection Manager used. The format was DELIMITED.

 

 

In the Columns section a new column COL_XML is added which is the ONLY column returned by the stored procedure that has the XML data.

 

 

 

 



The final important part was the below where we set up the data type which had to be Unicode text stream

Error: Could not continue scan with NOLOCK due to SQL Server data movement

Ran  the following

DBCC CHECKDB(MY_DATABASE) WITH PHYSICAL_ONLY
I got table error something like below

Msg 8909, Level 16, State 1, Line 1
Table error: Object ID 0, index ID -1, partition ID 0, alloc unit ID 0 (type Unknown),
page ID (1:219356) contains an incorrect page ID in its page header.
The PageId in the page header = (0:0).
Msg 8909, Level 16, State 1, Line 1
Table error: Object ID 0, index ID -1, partition ID 0, alloc unit ID 144115188075921408

So I ran the following

USE [master]
GO
ALTER DATABASE [MY_DATABASE] SET SINGLE_USER WITH ROLLBACK IMMEDIATE
GO
USE [DATABASE]
GO
DBCC CHECKTABLE(MY-Badtable, 'REPAIR_REBUILD')
GO
ALTER DATABASE [MY_DATABASE] SET MULTI_USER WITH ROLLBACK IMMEDIATE

Then  ran the following again
DBCC CHECKDB(MY_DATABASE)


This worked, no errors!

Script:Code to Find the Size and Growth Percentage of the tempdb Data and Log Files

Code to Find the Size and Growth Percentage of the tempdb Data and Log Files

SELECT
  name AS FileName,
  size*1.0/128 AS FileSizeinMB,
  CASE max_size
    WHEN 0 THEN 'Autogrowth is off.'
    WHEN -1 THEN 'Autogrowth is on.'
    ELSE 'Log file will grow to a maximum size of 2 TB.'
  END,
  growth AS 'GrowthValue',
  'GrowthIncrement' =
  CASE
    WHEN growth = 0 THEN 'Size is fixed and will not grow.'
    WHEN growth > 0 AND is_percent_growth = 0
      THEN 'Growth value is in 8-KB pages.'
    ELSE 'Growth value is a percentage.'
  END
FROM tempdb.sys.database_files;
GO

Script: Log file size to a user table

DECLARE @rowcnt INT
DECLARE @iterator INT
DECLARE @dbname VARCHAR(200)
DECLARE @exec_sql VARCHAR(500)
SET @rowcnt = 0
SET @iterator = 1
CREATE TABLE #db_file_info ( [Database_Name] SYSNAME NOT NULL, [File_ID] SMALLINT NOT NULL, [File_Type] VARCHAR(10) NOT NULL, [File_Name] SYSNAME NOT NULL, [File_Path] VARCHAR(500) NOT NULL, [File_Size_in_MB] INT NOT NULL, [Space_Used_in_MB] INT NOT NULL, [Space_Left_in_MB] INT NOT NULL, [Time_collected] smalldatetime )
CREATE TABLE #db ( dbid INT, name VARCHAR(200))
INSERT INTO #db
SELECT database_id, name FROM sys.databases
WHERE --database_id <> 11 AND [state] <> 6
SET @rowcnt = @@ROWCOUNT
WHILE @iterator <= @rowcnt
BEGIN
SELECT @dbname = '['+ name + ']' FROM #db
SET @exec_sql = ' USE ' + @dbname + ';
Insert into #DB_FILE_INFO Select db_name(),fileid,case when groupid = 0 then ''log file'' else ''data file'' end, name,filename, [file_size] = convert(int,round ((sysfiles.size*1.000)/128.000,0)), [space_used] = convert(int,round(fileproperty(sysfiles.name,''SpaceUsed'')/128.000,0)), [space_left] = convert(int,round((sysfiles.size-fileproperty(sysfiles.name,''SpaceUsed''))/128.000,0)), getdate() from dbo.sysfiles; '
EXEC( @exec_sql)
SET @iterator = @iterator + 1
END
INSERT INTO SQLAdmin_Monitor_db_file_info
SELECT * FROM #db_file_info
DROP TABLE #db
DROP TABLE #db_file_info

Modifying database file

All the database files are set to autogrowth to 10% from the initial sizes. But,the auto growth can happen any time during business hours causing the database slow down. Therefore I am taking the following approach -

1 I have set up a sql job ( calls a script listed here) that logs the current datafile and the log file size in a table in interval of 4 hours daily. I use that historical data to research when the data file needs to grow.
2. Then I run this script from the table to find which database file has more than 95% filled up and those are the candidate for me to manually resize ( expand) the data file.
3. I use the follwing script to resize the datafile
use db1
Go

---select * from sys.sysfiles

alter database client_343
modify file
(
name = client_343,
size = 1024MB
);

Script: To find the database file where the file space is used more than 94 % of the current file size

--The historic data is logged in a table in every 4 hours and the following query in run in the table to find the current grown rate of the databse file

SELECT Database_Name,Space_Used_in_MB,File_Size_in_MB,(cast(Space_Used_in_MB as float)/cast(File_Size_in_MB as float)) * 100 as newval
FROM Monitor_db..SQLAdmin_Monitor_db_file_info
WHERE FILE_ID = 1 AND (cast(Space_Used_in_MB as float)/cast(File_Size_in_MB as float)) * 100 >= 95 AND Time_collected IN (SELECT MAX(time_collected) FROM hCFS_SQLMonitor..SQLAdmin_Monitor_db_file_info )
ORDER BY File_Size_in_MB