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with pg_tags as (select *
where TagName like '%postgre%' or
(TagName like '%pg%' and TagName not like '%upgrade%'
and TagName not like '%p-g%' and TagName not like '%graph%'
and TagName not in ('fpga','upgrade','gpgpu','http-get','gnupg','pgiaccelerator')))
select * from posts
where creationdate > '2019-01-01' and Tags in (select 'postgres' from pg_tags)