Often when creating a new web app and configuring MySQL, certain fields will need to change in format as the app develops. For instance, I may change the format of a date field or a field which once was just int now needs a letter or what not. So usually I just make every field Varchar 255 until Im finished at which time Ill change data types to correct ones.So my question is, how important are data types? Whats the purpose? Speed?
Purpose of MySQL data type
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