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Last active October 2, 2018 19:31
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/* do not do this */
select
o.subscriberkey
from _open o
where
cast(o.eventdate as date) = convert(date, getDate()-1)
and o.isunique = 1
/* do this instead */
select
o.subscriberkey
from _open o
where
o.eventdate >= convert(date, getDate()-1)
and o.eventdate < convert(date, getDate())
and o.isunique = 1
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