Is there a way to increase the speed of the following insert without having to create an unclusterd index being suggested by sql server?

by croxfade   Last Updated October 18, 2019 20:06 PM - source

Below is a query that we are running that takes a while to run. Table 1 has about 400+ million records with 80 columns (this is a db warehouse table). The index being suggested is on the columnx with include all the remaining columns, something that I do not want to do.

  into table2
   table1.columnx = 'value'

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