Greek letters are not stored correctly in mysql database

[111140 (John Dimitroulakos)]

Hi,
I have connected to a mysql database. I have setup the collation to utf8 and utf8_genetal_ci but all the time i try to save a greek word, the word is stored in database like ‘???’. I have the same issue in the past with php. However i overcomed this in php using this

query("SET NAMES utf8");

I have set the locale in appsheet to Greek but this is not solve the problem.

Do you know what is the problem?

Thanks in advance.

[111140 (John Dimitroulakos)]

Is there anyone that has meet the above problem? I have seen that there is same trouble with spanish characters.
Is there any solution for this?