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@Asif: I added an explanation; if possible, test if this work, and haw fast it runs

JJoao
– JJoao

2016-04-12 21:19:16 +00:00
Commented Apr 12, 2016 at 21:19
It ran extremely fast, but it seems that it is including rows with empty 'EMAIL' fields

wubbalubba
– wubbalubba

2016-04-12 21:24:53 +00:00
Commented Apr 12, 2016 at 21:24
@Asif: added a "non empty" constrain. Is this what you were saying?

JJoao
– JJoao

2016-04-12 21:31:04 +00:00
Commented Apr 12, 2016 at 21:31

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