Hello. Please explain in general terms what kind of values can be stored in databases? Is everything limited to numbers and strings?
Much depends on the database you are using. If you take SQL Lite, then everything is limited to lines at all. If you take something heavier (MySQL, MS SQL, etc.), then there is also Date, DateTime, Blob (for storing binary data). Different variations of the same numbers (integer, floating point, monetary format), Boolean type (False, True). This is a vskidku everything, I think the respected community will be able to add.