How Can Set Task Scheduler in IIS for particular event

In table we have no identity number then create row id in table run time

SELECT t.* FROM (SELECT *, Row_Number() OVER(ORDER BY userid) AS RowNumber FROM table_user) t WHERE t.RowNumber % 2 = 0

select data in 2 part by even and odd data selection by sql query

select * from help where (SNo%2)=0 //even case

select * from help where (SNo%2)<>0 //odd case