I've seen several posts using select syntax similar to this:

  with mytab as
  (select * sometable)
  select *
  from mytab

as opposed to this:

  select *
  from (select * from sometable)


Does the structure of the 1st query have a certain name - what
keywords would I use when doing a search for the advantages/
disadvantages of the "with mytab as..." syntax?

Thanks
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