MySQL SELECT DISTINCT with WHERE

Question

I have a table similar to the following

I would like to count the total number of unique sequence numbers for a given user and/or date . I have been attempting to do this by using DISTINCT in the following manner:

SELECT COUNT(DISTINCT sequence) FROM table WHERE date=2020-06-29 // should return 2

The WHERE seems to be causing some issues because the response is 0. Do I need to do this using sub-queries instead?

Answer 1

Wrap your date with quote ( ' ) SELECT COUNT(DISTINCT sequence) FROM table WHERE date='2020-06-29'

Answer 2

may be this query is what you're looking for

SELECT COUNT(DISTINCT sequence) FROM table WHERE date = '2020-06-29'

or if you are not using mysql console may be you're using an editor try to save the date in the particular variable as a string thereafter call it
like:

date = '2020-06-29'
SELECT COUNT(DISTINCT sequence) FROM table WHERE date = date