Easiest way to update Admin password to b using SQL script in Sitecore

You need to run below SQL query in core database and that will update your default admin password to b

UPDATE [aspnet_Membership] SET Password='qOvF8m8F2IcWMvfOBjJYHmfLABc='
WHERE UserId IN (SELECT UserId FROM [aspnet_Users] WHERE UserName = 'sitecore\Admin')