troubleshooting Question

MySQL Query

Avatar of Richard Korts
Richard KortsFlag for United States of America asked on
MySQL Server
7 Comments2 Solutions165 ViewsLast Modified:
I have this query on a MySQL table

SELECT * from cvisitor where SUBSTRING(last_time,1,10) >= '2016-01-27' and SUBSTRING(last_time,1,10) <= '2016-01-28' and email not like '' order by last_time

There are a number of rows where the email IS like They are not excluded.

If I do the following, it works.

SELECT * from cvisitor where email not like ''

Why does not the first work?  Do I need parens around date comparisons?

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