SQL Server Multiple Rows into One row

Question

I have a table with lot of records. I provided a sample of 1 record (4 rows)

Need the rows to be combined as follows

How can this be achieved?

Answer 1

You can use aggregation:

select col1, max(col2), max(col3), max(col4)
from t
group by col1;

Note that the data you describe sounds like it comes from an aggregation query. Usually this is more easily fixed by fixing that query and fixing the group by keys.