Retrieve the files (data file, and log files) name and location path fron sql server backup file say abc.bak
By using the following sql statement we can retrieve the same :)
RESTORE FILELISTONLY FROM DISK='E:\abc.bak'
Wednesday, 26 June 2013
Saturday, 22 June 2013
-- Recursive CTE to return the management chain leading all the way up to the CEO for a specified employee
-- Recursive CTE to return the management chain leading all the way up to the CEO for a specified employee
With EmpCTE as(
Select empid,mgrid, firstname, lastname, 0 as distance
from HR.Employees
where empid = 9
Union ALL
Select M.empid,M.mgrid, M.firstname, M.lastname, S.distance+1 as distance
from EmpCTE As S
Inner Join HR.Employees As M ON M.empid = S.mgrid
)
Select * from EmpCTE
With EmpCTE as(
Select empid,mgrid, firstname, lastname, 0 as distance
from HR.Employees
where empid = 9
Union ALL
Select M.empid,M.mgrid, M.firstname, M.lastname, S.distance+1 as distance
from EmpCTE As S
Inner Join HR.Employees As M ON M.empid = S.mgrid
)
Select * from EmpCTE
Friday, 21 June 2013
NOT IN as same with <> ALL
NOT IN
========
SELECT *
FROM Emptable
WHERE (Departmentid NOT IN (SELECT Departmentid
FROM Emptable AS Emptable_1
WHERE (Empid < 5)
)
)
GO
<> ALL
======
SELECT *
FROM Emptable
WHERE (Departmentid <> ALL (SELECT Departmentid
FROM Emptable AS Emptable_1
WHERE (Empid < 5)
)
)
GO
***both query will produce same output.
========
SELECT *
FROM Emptable
WHERE (Departmentid NOT IN (SELECT Departmentid
FROM Emptable AS Emptable_1
WHERE (Empid < 5)
)
)
GO
<> ALL
======
SELECT *
FROM Emptable
WHERE (Departmentid <> ALL (SELECT Departmentid
FROM Emptable AS Emptable_1
WHERE (Empid < 5)
)
)
GO
***both query will produce same output.
Thursday, 6 June 2013
Why we prefer COALESCE standard function instead of ISNULL Non-standard function
-- Why we prefer COALESCE standard function instead of ISNULL Non-standard function
-- Execute the following sql statement and judge the output
DECLARE
@x AS VARCHAR(3) = NULL,
@y AS VARCHAR(10) = '1234567890';
SELECT ISNULL(@x,@y) AS [ISNULL], COALESCE(@x,@y) AS [COALESCE]
-- Execute the following sql statement and judge the output
DECLARE
@x AS VARCHAR(3) = NULL,
@y AS VARCHAR(10) = '1234567890';
SELECT ISNULL(@x,@y) AS [ISNULL], COALESCE(@x,@y) AS [COALESCE]
Wednesday, 5 June 2013
SQL Server db backup related information
SQL Server db backup related information
SQL Server holds all db backup related information into the
following tables:-
1.
SELECT * FROM msdb.dbo. backupset
2.
SELECT * FROM
msdb.dbo.backupmediafamily
We may use the following query, to find the important backup
related information
---- SQL statement start
select top 5
a.server_name, a.database_name, backup_finish_date, a.backup_size,
CASE a.[type] -- Let's decode the three main types of backup
here
WHEN 'D' THEN 'Full'
WHEN 'I' THEN
'Differential'
WHEN 'L' THEN
'Transaction Log'
ELSE a.[type]
END as BackupType
,b.physical_device_name
from msdb.dbo.backupset a join msdb.dbo.backupmediafamily b
on a.media_set_id =
b.media_set_id
where a.database_name Like 'Paylite4Alubaf%' -- databasename
order by a.backup_finish_date desc
--- SQL statement end
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