arkguil commented on issue #22696: [SPARK-25708][SQL] HAVING without GROUP BY 
means global aggregate
URL: https://github.com/apache/spark/pull/22696#issuecomment-490530838
 
 
   Indeed. The following query fails in Postgresql:
   `select id from (select 1 as id) t having id > 0`
   `ERROR: column "t.id" must appear in the GROUP BY clause or be used in an 
aggregate function Position: 8`
   
   Seems like SQL standard is very loosly implemented across the different 
RDBMS, but the stanrdard indeed state clearly that HAVING requires GROUP BY: 
   
   
https://cloud.google.com/bigquery/docs/reference/standard-sql/query-syntax#having-clause
   
   Thanks for the quick followup. We will fix our queries :)

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