Sql-server – SQL Server NULL values UNDO

sql server

I mistakenly updated the null values in my table to a string similar to an already present string. For e.g. I changed the NULL values to 'WL:5' and there were records for 'WL:5' already present. I want to change that string back to null values now, but if I update the table now, the other values which have the same name will also change. Any ideas?

Best Answer

Use backup file in order to recovery your data.