SQL Server - How to Grant Read Access to ALL databases to a Login?

Question

I need to give a new login read access to all 300 databases on a server. How can I accomplish this without checking 300 checkboxes in the user mapping area?

Answer 1

I had to tweak Martin Smith's answer slightly as:

1. The spaces and linebreaks resulted in not all the text being generated properly
2. The QUOTENAME in the Exec statement put in square brackets which is incorrect.

My version:

SET NOCOUNT ON;

DECLARE @user_name    SYSNAME
        , @login_name SYSNAME;

SELECT @user_name = 'HelpdeskUser',
       @login_name = 'Helpdesk'

SELECT 'USE ' + QUOTENAME(NAME) + ';
        CREATE USER ' + QUOTENAME(@user_name)
       + ' FOR LOGIN ' + QUOTENAME(@login_name)
       + ' WITH DEFAULT_SCHEMA=[dbo];
    EXEC sys.sp_addrolemember ''db_datareader'',''' + @user_name + ''';
    EXEC sys.sp_addrolemember ''db_denydatawriter'', ''' + @user_name + '''; 
GO'
FROM   sys.databases
WHERE  database_id > 4
       AND state_desc = 'ONLINE' 

Otherwise works perfectly. Thanks

Answer 2

You can use for example Cursor, like this :

USE master
GO

DECLARE @DatabaseName VARCHAR(32)   
DECLARE @SQL NVARCHAR(max)
DECLARE @User VARCHAR(64)
SET @User = '[SQL\srvSSISAcc]' --Your User

DECLARE Grant_Permission CURSOR LOCAL FOR
SELECT name FROM MASTER.dbo.sysdatabases
WHERE name NOT IN ('master','model','msdb','tempdb')  

OPEN Grant_Permission  
FETCH NEXT FROM Grant_Permission INTO @DatabaseName  
WHILE @@FETCH_STATUS = 0  
BEGIN  

    SELECT @SQL = 'USE '+ '[' + @DatabaseName + ']' +'; '+ 'CREATE USER ' + @User + 
    'FOR LOGIN ' + @User + '; EXEC sp_addrolemember N''db_datareader'', 
    ' + @User + '; EXEC sp_addrolemember N''db_datawriter'', ' + @User + ''

    EXEC sp_executesql @SQL
    PRINT @SQL

FETCH NEXT FROM Grant_Permission INTO @DatabaseName  
END  
CLOSE Grant_Permission  
DEALLOCATE Grant_Permission 

More info find in my post about this topic: http://www.pigeonsql.com/single-post/2016/12/23/Grant-User-Access-to-All-Databases

Answer 3

Cursor through the databases and GRANT access to each with a little t-sql.

I did not test the code below.

DECLARE db_cursor CURSOR FOR
SELECT name 
FROM master.dbo.sysdatabases 
WHERE name NOT IN ('master','model','msdb','tempdb') 


WHILE @@FETCH_STATUS = 0  
BEGIN  

GRANT SELECT ON DATABASE::@name to 'username'; 

FETCH NEXT FROM db_cursor INTO @name  
END 

Answer 4

One way would be to Set "Results to Text" on the query menu in SSMS then execute the below.

It doesn't actually make the change but generates a script for you to review and execute.

SET NOCOUNT ON;

DECLARE @user_name    SYSNAME
        , @login_name SYSNAME;

SELECT @user_name = 'user_name',
       @login_name = 'login_name'

SELECT '
    USE ' + QUOTENAME(NAME) + ';

    CREATE USER ' + QUOTENAME(@user_name)
       + ' FOR LOGIN ' + QUOTENAME(@login_name)
       + ' WITH DEFAULT_SCHEMA=[dbo];

    EXEC sys.sp_addrolemember
      ''db_datareader'',
      ''' + QUOTENAME(@user_name) + ''';

    EXEC sys.sp_addrolemember
      ''db_denydatawriter'',
      '''
       + QUOTENAME(@user_name) + '''; 

GO
'
FROM   sys.databases
WHERE  database_id > 4
       AND state_desc = 'ONLINE' 

Or you could look at sys.sp_MSforeachdb as here or Aaron Bertrand's improved version here

If you are not seeing all of the characters when you run this, open the Query Options for Text and check the setting for 'Maximum number of characters displayed in each column'. Make sure this is set to a value large enough to display all characters.

Answer 5

Declare @Databases Cursor
Declare @DbName as nvarchar(64)
Declare @Sql nvarchar(max)
Declare @BaseAddUserSql nvarchar(max)
Declare @BaseAddRoleSql nvarchar(max)

Set @Databases = Cursor Fast_Forward For
    select [name]
    from master..sysdatabases
    where [name] not in('master','model','msdb','tempdb')

Open @Databases
Fetch Next From @Databases Into @DbName

Set @BaseAddUserSql = 'exec sp_adduser ''LOGINNAME'''
Set @BaseAddRoleSql = 'exec sp_addrolemember ''db_datareader'', ''LOGINNAME'''


While @@Fetch_Status = 0
Begin
    Begin Try
        Set @Sql = 'Use ' + Quotename(@DbName)
        exec (@Sql)

        Set @Sql = Replace(@BaseAddUserSql, 'LOGINNAME', <loginname>)
        exec(@Sql)

        Set @Sql = Replace(@BaseAddRoleSql, 'LOGINNAME', <loginname>)
        exec(@Sql)
    End Try
    Begin Catch
    End Catch

    Fetch Next From @Databases Into @DbName
End

Close @Databases
Deallocate @Databases

Answer 6

EXEC sp_MSForEachDB 
'Declare @name varchar(100)
 select @name = ''?''
 PRINT @name
 IF db_id(@name) > 4
 BEGIN
 USE ?
 CREATE USER [user] FOR LOGIN [user];
EXEC sp_addrolemember ''db_datareader'', ''user''
 END'