MS SQL bulk user and database creation - sql

Question

I'm exploring options to setup a SQL 2016 database server to support teaching students database fundamentals. There will be close to 200 students on the course.
I'd like to automate the creation of all the user accounts and associated database via a script - this means the database for each user needs to be created at the same time. Basically each student's user login name and database will be named as the student's ID. Login authentication will be SQL authentication, not Windows as the lab PCs are not on AD.
If anyone could point me in the direction of any scripts I could modify or use it would be extremely helpful - basically if I go down this route I'll need to do it every year so scripting would be optimal.
Thanks
D.

Answer 1

Using Dynamic Sql and using while loop we can loop the student names and create database and logins.Hope it helps you
IF OBJECT_ID('Tempdb..#USerTable') IS NOT NULL
DROP TABLE #USerTable
IF OBJECT_ID('Tempdb..#USerNameINSERT') IS NOT NULL
DROP TABLE #USerNameINSERT
IF OBJECT_ID('Tempdb..#PasswordsINSERT') IS NOT NULL
DROP TABLE #PasswordsINSERT
--ADD Your student Names Passwords in a single line as below
DECLARE #Usernames NVARCHAR(max) = 'Stud1,Stud2,Stud3,Stud4'
,#Password NVARCHAR(max) = 'Password1,Password2,Password3,Password4'
,#Usernameselect NVARCHAR(max)
,#DatabaseNameselect NVARCHAR(max)
,#PasswordSelect NVARCHAR(max)
,#Usernameselect1 NVARCHAR(max)
,#DatabaseNameselect1 NVARCHAR(max)
,#PasswordSelect1 NVARCHAR(max)
DECLARE #USerName TABLE (
ID INT IDENTITY
,Usernames NVARCHAR(max)
,Passwords NVARCHAR(max)
)
INSERT INTO #USerName (
UserNAmes
,Passwords
)
SELECT #Usernames
,#Password
SELECT ID,UserNAmes INTO #USerNameINSERT
FRom (
SELECT Row_number()Over(Order by (SELECT NULL)) AS ID,Split.a.value('.', 'VARCHAR(1000)') AS UserNAmes
FROM (
SELECT ID, CAST('<S>' + REPLACE(UserNAmes, ',', '</S><S>') + '</S>' AS XML) AS UserNAmes
FROM #USerName
) AS A
CROSS APPLY UserNAmes.nodes('/S') AS Split(a)
)DT
SELECT ID,Passwords INTO #PasswordsINSERT
FRom (
SELECT Row_number()Over(Order by (SELECT NULL)) AS ID,Split.a.value('.', 'VARCHAR(1000)') AS Passwords
FROM (
SELECT CAST('<S>' + REPLACE(Passwords, ',', '</S><S>') + '</S>' AS XML) AS Passwords
FROM #USerName
) AS A
CROSS APPLY Passwords.nodes('/S') AS Split(a)
)DT
SELECT u.ID
,u.UserNAmes
,u.UserNAmes+'Db' AS DatabaseName
,p.Passwords
INTO #USerTable
FROM #USerNameINSERT u
INNER JOIN #PasswordsINSERT p ON p.ID = u.ID
DECLARE #minId INT
,#maxId INT
,#SqlQuery NVARCHAR(max)
,#SqlQuery1 NVARCHAR(max)
,#SqlQuery2 NVARCHAR(max)
SELECT #minId = MIN(ID)
,#maxId = Max(Id)
FROM #USerTable
WHILE (#minId <= #maxId)
BEGIN
SELECT #Usernameselect = UserNAmes
,#DatabaseNameselect = DatabaseName
,#PasswordSelect = Passwords
FROM #USerTable
WHERE ID = #minId
SET #SqlQuery = 'CREATE DATABASE ' + #DatabaseNameselect
SET #SqlQuery1 = 'USE [' + #DatabaseNameselect + ']'
SET #SqlQuery2 = 'CREATE LOGIN ' + #Usernameselect + ' WITH PASSWORD=N''' + #PasswordSelect + ''' MUST_CHANGE, CHECK_EXPIRATION=ON, CHECK_POLICY=ON'+ CHAR(13) + CHAR(10) + 'GO'
SET #SqlQuery = ISNULL('', 'GO') + CHAR(13) + CHAR(10) + #SqlQuery
+ CHAR(13) + CHAR(10) + 'GO' + CHAR(13) + CHAR(10) + #SqlQuery1
+ CHAR(13) + CHAR(10) + 'Go' + + CHAR(13) + CHAR(10) + #SqlQuery2
--EXEC (#SqlQuery)
PRINT #SqlQuery
SET #minId = #minId + 1
END

Answer 2

Use CREATE LOGIN command.
Following example will create user myDBUser.
USE [master]
GO
CREATE LOGIN [myDBUser] WITH PASSWORD=N'myPassword' MUST_CHANGE, DEFAULT_DATABASE=[myDB], CHECK_EXPIRATION=ON, CHECK_POLICY=ON
GO
And of course create DB user for such login
USE [myDB]
GO
CREATE USER myDBUser FOR LOGIN myDBUser;

Answer 3

I think something like this would work, you might need to alter the dynamic SQL bit around the login as its a bit thrown together.
--Create table for bulk insert
Create Table UserNameCSV (UserID int, UserName Varchar(100))
--Insert login names from C:\csvtest.txt
BULK
INSERT UserNameCSV
FROM 'c:\csvtest.txt'
WITH
(FIELDTERMINATOR = ',', ROWTERMINATOR = '\n')
GO
-- Run Cursor
Declare #UserName Varchar(100)
Declare db_Cursor CURSOR FAST_FORWARD FOR
Select UserName from UserNameCSV
OPEN db_Cursor
FETCH NEXT FROM db_Cursor INTO #UserName
WHILE ##FETCH_STATUS = 0
BEGIN
DECLARE #Sql varchar(max) ='CREATE DATABASE ' + #UserName
DECLARE #Sql1 varchar(max) = 'USE [' + #UserName + ']'
DECLARE #Sql2 varchar(max) = 'CREATE LOGIN ' + #UserName + ' WITH PASSWORD=N''myPassword123!'' MUST_CHANGE, CHECK_EXPIRATION=ON, CHECK_POLICY=ON'
EXECUTE(#Sql)
EXECUTE (#Sql1)
EXECUTE (#Sql2)
FETCH NEXT FROM db_Cursor into #UserName
END
CLOSE db_Cursor
DEALLOCATE db_Cursor