How to update large table with millions of rows in SQL Server?

Question

I\'ve an UPDATE statement which can update more than million records. I want to update them in batches of 1000 or 10000. I tried with @@ROWCOUNT bu

Answer 1

WHILE EXISTS (SELECT * FROM TableName WHERE Value <> 'abc1' AND Parameter1 = 'abc' AND Parameter2 = 123)
BEGIN
UPDATE TOP (1000) TableName
SET Value = 'abc1'
WHERE Parameter1 = 'abc' AND Parameter2 = 123 AND Value <> 'abc1'
END