SQL Server Agent jobs

Disable All SQL Server Agent Jobs

USE MSDB;
GO
UPDATE MSDB.dbo.sysjobs
SET Enabled = 0
WHERE Enabled = 1;
GO

Enable All SQL Server Agent Jobs

USE MSDB;
GO
UPDATE MSDB.dbo.sysjobs
SET Enabled = 1
WHERE Enabled = 0;
GO

Disable Jobs By Job Name

USE MSDB;
GO
UPDATE MSDB.dbo.sysjobs
SET Enabled = 0
WHERE [Name] LIKE 'Admin%';
GO

Disable Jobs By Job Category

USE MSDB;
GO
UPDATE J
SET J.Enabled = 0
FROM MSDB.dbo.sysjobs J
INNER JOIN MSDB.dbo.syscategories C
ON J.category_id = C.category_id
WHERE C.[Name] = 'Database Maintenance';
GO