Compare String with curdate() - Mysql - mysql

Question

I plan to make a selection of multiple database tables.
The problem is that I want the current date is equal to current date, only that it is of type varchar, I can't make a direct comparison with the CURDATE () ... Is there any way to compare the current date with the String type?
Code:
select records.date , records.hour, records.Temp, records.Hum, sensors.idSensor, sensors.idLocalization
from records, sensors
where records.idSensor=sensors.idSensor
and records.date = curdade() // Here is where I wanted to make the comparison date
order by records.date desc;
------------------EDIT (Solved)--------------------------
Thank you all for your help.
I switched CURDATE by curdade.
He made the comparison correctly.

Answer 1

Convert the curdate() to a string of the appropriate format. Something like:
select r.date, r.hour, r.Temp, r.Hum, s.idSensor, s.idLocalization
from records r join
sensors s
on r.idSensor = s.idSensor
where r.date = date_format(curdate(), '%Y-%m-%d') // Here is where I wanted to make the comparison date
order by r.date desc;
You need to use the appropriate format for your date column. I just used the "right" format, the ISO standard date format that is the best to use when representing a date as a string. You can read about the formats in the documentation. And, it is better to turn the current date into the right format than to convert the string to a date. By putting the function on the "constant" part of the comparison, MySQL can still take advantage of an index on date.

Answer 2

Try this. It may work. But this is a date-to-date data type comparison, not a string-to-string comparison.
select STR_TO_DATE(records.date, '%Y-%m-%d') AS date , records.hour, records.Temp, records.Hum, sensors.idSensor, sensors.idLocalization
from records, sensors
where records.idSensor=sensors.idSensor
and date = curdate() // Here is where I wanted to make the comparison date
order by date desc;