在mysql建表sql里，我们经常会有定义字符串类型的需求。 比方说user表里的名字，就是个字符串。mysql里有两个类型比较适合这个场景。 char和varchar。 声明它们都需要在字段边上加个数组，比如char(100)和varchar(100)，这个100是指当前字段能放的最大字符数。 char和 ...

If I declare a varchar(1000) for a field and someone enters "hi", I'm wondering how the memory is allocated for it. I was under the impression that varchar2(1000) in Oracle would only allocate space ...

Another one of these choices... to go with a char or varchar for a field. Not really an issue with space since we are only looking at a couple of thousand records or so but just wondering what the ...