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Delete duplicate records
https://www.experts-exchange.com/questions/29166962/Delete-unwanted-records.html?anchorAnswerId=42997133#a42997133
id X year
45 1375 2018
23 1514 2018
67 1516 2017
32 1516 2018
78 1502 2018
54 1908 2017
11 1908 2018
24 1908 2015
98 1908 2016
85 1908 2018
52 1908 2016
for above data, the above code generates the following output.
id X year
54 1908 2017
11 1908 2018
24 1908 2015
98 1908 2016
85 1908 2018
52 1908 2016
I wanted to delete the duplicate records from the above output when X and year are same so that the output should be
id X year
54 1908 2017
11 1908 2018
24 1908 2015
98 1908 2016
id X year
45 1375 2018
23 1514 2018
67 1516 2017
32 1516 2018
78 1502 2018
54 1908 2017
11 1908 2018
24 1908 2015
98 1908 2016
85 1908 2018
52 1908 2016
for above data, the above code generates the following output.
id X year
54 1908 2017
11 1908 2018
24 1908 2015
98 1908 2016
85 1908 2018
52 1908 2016
I wanted to delete the duplicate records from the above output when X and year are same so that the output should be
id X year
54 1908 2017
11 1908 2018
24 1908 2015
98 1908 2016
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