Sql database space details query

Find Sql database recovery model, Space used and space freed by MDF and LDF files on all databases.

------------------------------Data file size----------------------------
IF EXISTS (
  SELECT *
  FROM tempdb.sys.all_objects
  WHERE NAME LIKE '%#dbsize%'
  )
 DROP TABLE #dbsize

CREATE TABLE #dbsize (
 Dbname VARCHAR(30)
 ,dbstatus VARCHAR(20)
 ,Recovery_Model VARCHAR(10) DEFAULT('NA')
 ,file_Size_MB DECIMAL(20, 2) DEFAULT(0)
 ,Space_Used_MB DECIMAL(20, 2) DEFAULT(0)
 ,Free_Space_MB DECIMAL(20, 2) DEFAULT(0)
 )
GO

INSERT INTO #dbsize (
 Dbname
 ,dbstatus
 ,Recovery_Model
 ,file_Size_MB
 ,Space_Used_MB
 ,Free_Space_MB
 )
EXEC sp_msforeachdb 'use [?];
  select DB_NAME() AS DbName,
    CONVERT(varchar(20),DatabasePropertyEx(''?'',''Status'')) , 
    CONVERT(varchar(20),DatabasePropertyEx(''?'',''Recovery'')), 
sum(size)/128.0 AS File_Size_MB,
sum(CAST(FILEPROPERTY(name, ''SpaceUsed'') AS INT))/128.0 as Space_Used_MB,
SUM( size)/128.0 - sum(CAST(FILEPROPERTY(name,''SpaceUsed'') AS INT))/128.0 AS Free_Space_MB 
from sys.database_files  where type=0 group by type'
GO

-------------------log size--------------------------------------
IF EXISTS (
  SELECT *
  FROM tempdb.sys.all_objects
  WHERE NAME LIKE '#logsize%'
  )
 DROP TABLE #logsize

CREATE TABLE #logsize (
 Dbname VARCHAR(30)
 ,Log_File_Size_MB DECIMAL(20, 2) DEFAULT(0)
 ,log_Space_Used_MB DECIMAL(20, 2) DEFAULT(0)
 ,log_Free_Space_MB DECIMAL(20, 2) DEFAULT(0)
 )
GO

INSERT INTO #logsize (
 Dbname
 ,Log_File_Size_MB
 ,log_Space_Used_MB
 ,log_Free_Space_MB
 )
EXEC sp_msforeachdb 'use [?];
  select DB_NAME() AS DbName,
sum(size)/128.0 AS Log_File_Size_MB,
sum(CAST(FILEPROPERTY(name, ''SpaceUsed'') AS INT))/128.0 as log_Space_Used_MB,
SUM( size)/128.0 - sum(CAST(FILEPROPERTY(name,''SpaceUsed'') AS INT))/128.0 AS log_Free_Space_MB 
from sys.database_files  where type=1 group by type'
GO

--------------------------------database free size
IF EXISTS (
  SELECT *
  FROM tempdb.sys.all_objects
  WHERE NAME LIKE '%#dbfreesize%'
  )
 DROP TABLE #dbfreesize

CREATE TABLE #dbfreesize (
 NAME VARCHAR(50)
 ,database_size VARCHAR(50)
 ,Freespace VARCHAR(50) DEFAULT(0.00)
 )

INSERT INTO #dbfreesize (
 NAME
 ,database_size
 ,Freespace
 )
EXEC sp_msforeachdb 
 'use ?;SELECT database_name = db_name()
    ,database_size = ltrim(str((convert(DECIMAL(15, 2), dbsize) + convert(DECIMAL(15, 2), logsize)) * 8192 / 1048576, 15, 2) + ''MB'')
    ,''unallocated space'' = ltrim(str((
                CASE 
                    WHEN dbsize >= reservedpages
                        THEN (convert(DECIMAL(15, 2), dbsize) - convert(DECIMAL(15, 2), reservedpages)) * 8192 / 1048576
                    ELSE 0
                    END
                ), 15, 2))
FROM (
    SELECT dbsize = sum(convert(BIGINT, CASE 
                    WHEN type = 0
                        THEN size
                    ELSE 0
                    END))
        ,logsize = sum(convert(BIGINT, CASE 
                    WHEN type <> 0
                        THEN size
                    ELSE 0
                    END))
    FROM sys.database_files
) AS files
,(
    SELECT reservedpages = sum(a.total_pages)
        ,usedpages = sum(a.used_pages)
        ,pages = sum(CASE 
                WHEN it.internal_type IN (
                        202
                        ,204
                        ,211
                        ,212
                        ,213
                        ,214
                        ,215
                        ,216
                        )
                    THEN 0
                WHEN a.type <> 1
                    THEN a.used_pages
                WHEN p.index_id < 2
                    THEN a.data_pages
                ELSE 0
                END)
    FROM sys.partitions p
    INNER JOIN sys.allocation_units a
        ON p.partition_id = a.container_id
    LEFT JOIN sys.internal_tables it
        ON p.object_id = it.object_id
) AS partitions'

-----------------------------------
IF EXISTS (
  SELECT *
  FROM tempdb.sys.all_objects
  WHERE NAME LIKE '%#alldbstate%'
  )
 DROP TABLE #alldbstate

CREATE TABLE #alldbstate (
 dbname VARCHAR(25)
 ,DBstatus VARCHAR(25)
 ,R_model VARCHAR(20)
 )

--select * from sys.master_files
INSERT INTO #alldbstate (
 dbname
 ,DBstatus
 ,R_model
 )
SELECT NAME
 ,CONVERT(VARCHAR(20), DATABASEPROPERTYEX(NAME, 'status'))
 ,recovery_model_desc
FROM sys.databases

--select * from #dbsize
INSERT INTO #dbsize (
 Dbname
 ,dbstatus
 ,Recovery_Model
 )
SELECT dbname
 ,dbstatus
 ,R_model
FROM #alldbstate
WHERE DBstatus <> 'online'

INSERT INTO #logsize (Dbname)
SELECT dbname
FROM #alldbstate
WHERE DBstatus <> 'online'

INSERT INTO #dbfreesize (NAME)
SELECT dbname
FROM #alldbstate
WHERE DBstatus <> 'online'

SELECT d.Dbname
 ,d.dbstatus
 ,d.Recovery_Model
 ,(file_size_mb + log_file_size_mb) AS DBsize
 ,d.file_Size_MB
 ,d.Space_Used_MB
 ,d.Free_Space_MB
 ,l.Log_File_Size_MB
 ,log_Space_Used_MB
 ,l.log_Free_Space_MB
 ,fs.Freespace AS DB_Freespace_MB
FROM #dbsize d
INNER JOIN #logsize l ON d.Dbname = l.Dbname
INNER JOIN #dbfreesize fs ON d.Dbname = fs.NAME
ORDER BY Dbname

Finding recovery model type for all sql databases in a server.

Finding recovery model type for all sql databases in a server.

SELECT NAME AS [Database Name]
 ,recovery_model_desc AS [Recovery Model]
FROM sys.databases
GO

determining index fragmentation and business rules.

Index Fragmentation: It plays an important role in improving the performance of the sql server. The indexes get fragments as more and more records are inserted and updated to the respective table. so in order to check the fragmentation, use the following query to get all information: 

PS: Business Rules defined by Microsoft to determine the fragmentation of the indexes. 
1. If the index fragmentation average is greater than and equal to 30 percent, then rebuild/ recreate the index to reduce fragmentation.
2. If the index fragmentation average is between 5 to 30 percent then reorganize a respective index.
3. If the index fragmentation average is below 5 percent, then no action is required.

Also, in general for page_count, we use to practice page_count=>2000.

So, for example, if certain index at avg_Fragmentation_percent>30 but page_count= 100 (assuming), then we can ignore that index.

Query to determine fragmentation is defined below: 

SELECT ps.database_id
 ,ps.OBJECT_ID
 ,ps.index_id
 ,b.NAME
 ,ps.avg_fragmentation_in_percent
 ,ps.avg_fragment_size_in_pages
 ,ps.page_count
FROM sys.dm_db_index_physical_stats(DB_ID(), NULL, NULL, NULL, NULL) AS ps
INNER JOIN sys.indexes AS b ON ps.OBJECT_ID = b.OBJECT_ID
 AND ps.index_id = b.index_id
WHERE ps.database_id = DB_ID()
 AND ps.avg_fragmentation_in_percent >= 5
 AND page_count >= 2000
 AND b.NAME IS NOT NULL
ORDER BY ps.avg_fragmentation_in_percent DESC
GO

Useful System functions in Sql server

Following are the some of the most useful system functions   which helps us to get useful information.

·         Command: sp_helpdb ‘database_name’

Example: EXEC sp_helpdb N'AdventureWorks2012';

Details: informs about a specified database.

·         Command: sp_helpindex ‘table_name’

Example: EXEC sp_helpindex N'tblEmployee';

Details: gives information about all the indexes created on defined table.

·         Command: sp_helpstats ‘table_name’

Example: EXEC sp_helpstats N'tblEmployee';

Details: gives information about columns and indexes on the specified table.

·         Command: sp_ helptext ‘table_name’

Example: EXEC sp_helptext N'sp_getAllEmployees';

Details: gives the definition of Stored Procedures, User defined Functions, User defined Rule, Trigger, view, Computed Column.

·         Command: sp_help  ‘Object_name’

Example: EXEC sp_help N'sp_getAllEmployees';

Details: gives information about database object, like in this case, for SP, it gets sp details and parameters information like name, type, length etc .