Issue:
I have created a link server in MS SQL server.
Connect to database with "windows Auhtentication" - Connection successful
Conneect to database server with " SQL server Auhtentication - Test connection fail
most proabably you will get an error like below
Cannot create an instance of OLE DB provider "OraOLEDB.Oracle" for linked server "YourLinkServerName". (Microsoft SQL Server, Error: 7302)
Solution :
Enable "Allow inprocess" to "OraOLEDB.Oracle"
How to do this
---------
Server Objects --> Linked Servers -->Providers --> OraOLEDB.Oracle
tick Enable "Allow inprocess"
make sure you have link server using this provider
Thursday, November 3, 2016
Tuesday, October 25, 2016
Maven jar dependencies are displayed outside `Maven Dependencies` view
showing the all jars listed in eclipse is a real headache. let's see how to get rid of that.
3. Import project using wizard - existing maven project. You will get rid of the issue.
| jars shown outside |
- Just delete the project from the eclipse. (do not delete from disk, if you not sure about this - better to backup below delete)
- go to folder structure of the project and delete generated files. (".settings" folder, "target" folder, "classpath" file, ".project" file )
| delete generated folders |
| import again as a existing maven project |
| issue sorted - libraries are not shown now |
Friday, October 21, 2016
Microsoft SQL server - Restore dates
It's handy stuff if you can find the refresh dates of a database. All details are inside db server and it's a matter of finding the correct query.
Below query will help to get the required information on refresh/ db restoration
Below query will help to get the required information on refresh/ db restoration
SELECT [rs].[destination_database_name], [rs].[restore_date], [bs].[backup_start_date], [bs].[backup_finish_date], [bs].[database_name] as [source_database_name], [bmf].[physical_device_name] as [backup_file_used_for_restore] FROM msdb..restorehistory rs INNER JOIN msdb..backupset bs ON [rs].[backup_set_id] = [bs].[backup_set_id] INNER JOIN msdb..backupmediafamily bmf ON [bs].[media_set_id] = [bmf].[media_set_id] ORDER BY [rs].[restore_date] DESC
Saturday, October 15, 2016
Few Good Youtube links for Understand Finacial Markets
The Causes and Effects of the 2008 Financial Crisis
https://www.youtube.com/watch?v=N9YLta5Tr2A
Economic Schools of Thought: Crash Course Economics
Friday, September 23, 2016
Copying logins from one Sql server to another SQL server 2012
when you restoring data base you may need to copy the users also. sql server gives a easy way of scripting out this process using two sps.
Steps:
For more information refer below links
https://support.microsoft.com/en-us/kb/918992
https://support.microsoft.com/en-us/kb/246133
Below are the script for two sps
-------------------------------start script----------------------------------------------------------------
- sp_help_revlogin
- sp_hexadecimal
Steps:
- create two sps. naming " sp_help_revlogin " and "sp_hexadecimal "
- script out the user details by running "sp_help_revlogin"
- exec sp_help_revlogin
- If you need to run only for specific user run sp with user name.
- exec sp_help_revlogin 'Alex'
- once you run scripts , you will get the script to be run on the other server. It's just a matter of copying it and run on the server you need to create/copy users
For more information refer below links
https://support.microsoft.com/en-us/kb/918992
https://support.microsoft.com/en-us/kb/246133
Below are the script for two sps
-------------------------------start script----------------------------------------------------------------
USE master
GO
IF OBJECT_ID ('sp_hexadecimal') IS NOT NULL
DROP PROCEDURE sp_hexadecimal
GO
CREATE PROCEDURE sp_hexadecimal
@binvalue varbinary(256),
@hexvalue varchar (514) OUTPUT
AS
DECLARE @charvalue varchar (514)
DECLARE @i int
DECLARE @length int
DECLARE @hexstring char(16)
SELECT @charvalue = '0x'
SELECT @i = 1
SELECT @length = DATALENGTH (@binvalue)
SELECT @hexstring = '0123456789ABCDEF'
WHILE (@i <= @length)
BEGIN
DECLARE @tempint int
DECLARE @firstint int
DECLARE @secondint int
SELECT @tempint = CONVERT(int, SUBSTRING(@binvalue,@i,1))
SELECT @firstint = FLOOR(@tempint/16)
SELECT @secondint = @tempint - (@firstint*16)
SELECT @charvalue = @charvalue +
SUBSTRING(@hexstring, @firstint+1, 1) +
SUBSTRING(@hexstring, @secondint+1, 1)
SELECT @i = @i + 1
END
SELECT @hexvalue = @charvalue
GO
IF OBJECT_ID ('sp_help_revlogin') IS NOT NULL
DROP PROCEDURE sp_help_revlogin
GO
CREATE PROCEDURE sp_help_revlogin @login_name sysname = NULL AS
DECLARE @name sysname
DECLARE @type varchar (1)
DECLARE @hasaccess int
DECLARE @denylogin int
DECLARE @is_disabled int
DECLARE @PWD_varbinary varbinary (256)
DECLARE @PWD_string varchar (514)
DECLARE @SID_varbinary varbinary (85)
DECLARE @SID_string varchar (514)
DECLARE @tmpstr varchar (1024)
DECLARE @is_policy_checked varchar (3)
DECLARE @is_expiration_checked varchar (3)
DECLARE @defaultdb sysname
IF (@login_name IS NULL)
DECLARE login_curs CURSOR FOR
SELECT p.sid, p.name, p.type, p.is_disabled, p.default_database_name, l.hasaccess, l.denylogin FROM
sys.server_principals p LEFT JOIN sys.syslogins l
ON ( l.name = p.name ) WHERE p.type IN ( 'S', 'G', 'U' ) AND p.name <> 'sa'
ELSE
DECLARE login_curs CURSOR FOR
SELECT p.sid, p.name, p.type, p.is_disabled, p.default_database_name, l.hasaccess, l.denylogin FROM
sys.server_principals p LEFT JOIN sys.syslogins l
ON ( l.name = p.name ) WHERE p.type IN ( 'S', 'G', 'U' ) AND p.name = @login_name
OPEN login_curs
FETCH NEXT FROM login_curs INTO @SID_varbinary, @name, @type, @is_disabled, @defaultdb, @hasaccess, @denylogin
IF (@@fetch_status = -1)
BEGIN
PRINT 'No login(s) found.'
CLOSE login_curs
DEALLOCATE login_curs
RETURN -1
END
SET @tmpstr = '/* sp_help_revlogin script '
PRINT @tmpstr
SET @tmpstr = '** Generated ' + CONVERT (varchar, GETDATE()) + ' on ' + @@SERVERNAME + ' */'
PRINT @tmpstr
PRINT ''
WHILE (@@fetch_status <> -1)
BEGIN
IF (@@fetch_status <> -2)
BEGIN
PRINT ''
SET @tmpstr = '-- Login: ' + @name
PRINT @tmpstr
IF (@type IN ( 'G', 'U'))
BEGIN -- NT authenticated account/group
SET @tmpstr = 'CREATE LOGIN ' + QUOTENAME( @name ) + ' FROM WINDOWS WITH DEFAULT_DATABASE = [' + @defaultdb + ']'
END
ELSE BEGIN -- SQL Server authentication
-- obtain password and sid
SET @PWD_varbinary = CAST( LOGINPROPERTY( @name, 'PasswordHash' ) AS varbinary (256) )
EXEC sp_hexadecimal @PWD_varbinary, @PWD_string OUT
EXEC sp_hexadecimal @SID_varbinary,@SID_string OUT
-- obtain password policy state
SELECT @is_policy_checked = CASE is_policy_checked WHEN 1 THEN 'ON' WHEN 0 THEN 'OFF' ELSE NULL END FROM sys.sql_logins WHERE name = @name
SELECT @is_expiration_checked = CASE is_expiration_checked WHEN 1 THEN 'ON' WHEN 0 THEN 'OFF' ELSE NULL END FROM sys.sql_logins WHERE name = @name
SET @tmpstr = 'CREATE LOGIN ' + QUOTENAME( @name ) + ' WITH PASSWORD = ' + @PWD_string + ' HASHED, SID = ' + @SID_string + ', DEFAULT_DATABASE = [' + @defaultdb + ']'
IF ( @is_policy_checked IS NOT NULL )
BEGIN
SET @tmpstr = @tmpstr + ', CHECK_POLICY = ' + @is_policy_checked
END
IF ( @is_expiration_checked IS NOT NULL )
BEGIN
SET @tmpstr = @tmpstr + ', CHECK_EXPIRATION = ' + @is_expiration_checked
END
END
IF (@denylogin = 1)
BEGIN -- login is denied access
SET @tmpstr = @tmpstr + '; DENY CONNECT SQL TO ' + QUOTENAME( @name )
END
ELSE IF (@hasaccess = 0)
BEGIN -- login exists but does not have access
SET @tmpstr = @tmpstr + '; REVOKE CONNECT SQL TO ' + QUOTENAME( @name )
END
IF (@is_disabled = 1)
BEGIN -- login is disabled
SET @tmpstr = @tmpstr + '; ALTER LOGIN ' + QUOTENAME( @name ) + ' DISABLE'
END
PRINT @tmpstr
END
FETCH NEXT FROM login_curs INTO @SID_varbinary, @name, @type, @is_disabled, @defaultdb, @hasaccess, @denylogin
END
CLOSE login_curs
DEALLOCATE login_curs
RETURN 0
GO
-------------------end script------------------------------------------
Friday, September 9, 2016
file types in sql server database
There are three main file types
- MDF
- NDF
- LDF
MDF - Primary data file
Starting point of the database.This points to other files inside database.Every database has one primary data file.
All the data in the database objects are stored inside primary data file.(tables, stored procedures, triggers, views,....etc)
NDF - secondary data files
can have only one primary file and maintain any number of secondary data files
Optional - not necessary to have.
LDF - Log files
hold the all the log information
you can use this to recover database
size of log file depends on the log level defined by the database administrator
Should have at least one log file. ( can have multiples)
So basically you should have a primary data file and log file for each database.
mentioned extensions for the each category are optional and you can have any extension name instead of (.mdf, .ndf, .ldf) , but it is recommend to follow the standard. unless you have a necessity.
System Cannot Find the path specified - Restore database from back up file
you may have got the error "System Cannot Find the path specified " when restoring database from a back up file.
reason : sql server does not create the directory structure
solution: create the directory structure. you will get rid of the error
reason : sql server does not create the directory structure
solution: create the directory structure. you will get rid of the error
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