sql - Oracle column number increase -


I know that to increase the row number in column 1 in column 1, when the column 2 value changes in oracle

What I'm looking for: 

  COL1 COL2 COL3 | 1 2000 xx 1 2000 xy | 1 2000 xyz 2 3020 x | 2 3020 xiii | 3 5666666 UAU

Any ideas?

I think you are looking for a window function: 

 Choose  from row_number () over_table in form of col1, col2, col3 (col2 by col2 order split by);

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