select -- все что правее двух минусов в текуще строке - комментарий

/* комментарий заключенный в такие парные ограничения */

select 
  /*
  в отличии от первого вида, 
  может быть многострочным
  */

--====================================================================================================
,eventListWithObj    AS (
------------------------------------------------------------------------------------------------------
SELECT
  eL.grp            as grp,
  fLd.Name          as Name,
  eL.dscr           as dscr,
  eL.beginDt        as beginDt,
  eL.endDate        as endDate
FROM comEvents eL
  LEFT JOIN FOLDERS fLd ON (eL.folderId = fLd.UID)
WHERE (left(fLd.Name, 7) = 'ЮП ГТЭС'      )
   or (left(fLd.Name,13) = 'ГПЭС Аггреко-')
   or (left(fLd.Name,11) = 'ГПЭС Зимнее'  )
   or (left(fLd.Name,10) = 'ГПЭС КНС-2'   )
)

--====================================================================================================
,eventListWithObj    AS (
------------------------------------------------------------------------------------------------------
SELECT
  eL.grp            as grp,
  fLd.Name          as Name,
  eL.dscr           as dscr,
  eL.beginDt        as beginDt,
  eL.endDate        as endDate
FROM comEvents eL
  LEFT JOIN FOLDERS fLd ON (eL.folderId = fLd.UID)
WHERE (fLd.LIBTYPE = 'Генератор')
)

--====================================================================================================
,eventListWithObj    AS (
------------------------------------------------------------------------------------------------------
SELECT
  eL.grp            as grp,
  fLd.Name          as Name,
  eL.dscr           as dscr,
  eL.beginDt        as beginDt,
  eL.endDate        as endDate
FROM comEvents eL
  LEFT JOIN FOLDERS fLd ON (eL.folderId = fLd.UID)
)