sql server - Map columns to its ID using TSQL -


i have query gets duplicate records in table. see below:

select column1, column2 table1 group  column1, column2 having count(column1 +  column2) > 1

now, need map column1 , column2 table id, can't incorporate in query above. i'm using tsql, how do this?

this code worked ids:

select id table1 inner join (     select column1, column2     table1     group  column1, column2     having count(column1 +  column2) > 1 ) thistable on table1.column1= thistable.column1and  table1.column2= thistable.column2

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