Tag: SQL server

SQL Server NULL or empty value checking

This is how to check NULL or empty input values for a date column. Currently NULL or empty values produces ‘1900-01-01’ value which is not acceptable. 

DECLARE @InputDate DATE

--set input to spaces
SET @InputDate = ''
--don't want 1900-01-01 output, instead NULL value
SELECT ISNULL(NULLIF(@InputDate, ''), NULL) AS InputDateSpaces

--set input to null
SET @InputDate = NULL
--don't want 1900-01-01 output, instead NULL value
SELECT ISNULL(NULLIF(@InputDate, ''), NULL) AS InputDateNULL

--set input to date
SET @InputDate = '2021-06-25'
--don't want 1900-01-01 output, instead date value
SELECT ISNULL(NULLIF(@InputDate, ''), NULL) AS InputDateRealDate

These are the results;

Select Date between Two Date Columns

This is how to run a SQL Query where you have two date columns and like to see if your date falls between those columns;

SELECT * FROM FiscalCalendarRef
WHERE 1=1
AND '2021-09-13' BETWEEN StartDate AND EndDate

If EndDate column is defined as NULL, you can change it like this;

SELECT * FROM FiscalCalendarRef
WHERE 1=1
AND '2021-09-13' BETWEEN StartDate AND COALESCE(EndDate, GETDATE())

View effective permission of single user

Login to SQL Server as an admin account. Run following query by impersonating the user;

execute as user = 'SomeUserName' -- Set this to the user name you wish to check
select * from fn_my_permissions(null, 'DATABASE') -- Leave these arguments, don't change to MyDatabaseName
order by subentity_name, permission_name
revert

This will list all effective permission for this user;

Read, Write and Execute permission to SQL Login

I have a web application. This application connect to MS SQL SERVER 2017 for data manipulation (SELECT, UPDATE, DELETE, INSERT) and execute stored procedures. The application also run SQL Agent jobs. I need to create a user in the database to allows application to connect and execute queries, stored procedures and run SQL Agent jobs.  

Open SSMS (sql server management studio) login through sysaddmin  acount e.g.  sa

Make sure “user1” has connect permission to yourDB.

Execute this query

use yourDB
go

GRANT EXECUTE TO user1
GRANT SELECT TO user1
GRANT INSERT TO user1
GRANT UPDATE TO user1
GRANT DELETE TO user1

and also execute this

GRANT ALTER ON SCHEMA::dbo TO user1

where user1 is your user

If we want to allow this user to run sql agent jobs, we need to add it to “SQLAgentOperatorRole”. This role will allow the user to run any job on the server.

Now to SQL Agent permissions;

USE [msdb]
GO
CREATE USER [user1] FOR LOGIN [user1]
GO
USE [msdb]
GO
ALTER ROLE [SQLAgentOperatorRole] ADD MEMBER [user1]
GO

Make sure user has these permissions in MSDB database;

This is a good article on setting up jobs and an idea to integrate those jobs in UI.

How do I let someone execute a SQL Agent job they don’t own?

for troubleshooting, assign user to “sysadmin” Server Role. Make sure to revoke this permission afterwards.