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Asked: 2026-05-19T04:33:15+00:00

I have a table like this: People —————– email_address created_date I also have a

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I have a table like this:

People
-----------------
email_address
created_date

I also have a spreadsheet with about 60,000 e-mail addresses in it. I need to select the “created_date” for each e-mail address in the spreadsheet. The way I am currently approaching it is to create one big select statement with an IN clause:

SELECT email_address, created_date FROM People WHERE email_address in (
'user1@something.com',
'user2@something.com',
'user3@something.com',
...

The problem with this is that it is a HUGE script (60,000+ lines) and I can’t even get it to run due to errors like “Got a packet bigger than ‘max_allowed_packet’ bytes” and “MSQL Server has gone away”.

I might be able to fix those errors by increasing max_allowed_packet, etc., but I have a feeling that it might just be a symptom that my SQL sucks and instead of just treating the symptom, I should fix the problem and write better SQL. Let me know if you have any suggestions!

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1 Answer

  1. Editorial Team

    Load the email addresses into a separate, one column table and use

     SELECT email_address, created_date FROM People 
    WHERE email_address IN (SELECT email_address FROM email_table)
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