对MySQL使用UTF-8

Question

如果假设一字节字符不能正确用于Unicode字符，那么在MySQL中使用UTF-8之前我们需要注意什么？

Answer 1

There are no single-byte 8-bit encoding in utf8. All are 2, 3, or 4 bytes long.

For example, is your data containing a single-byte 8-bit encoding such as hex E9 for an é instead of the 2-byte hex C3A9? In that case you need to say your client has "latin1" by saying SET NAMES latin1 , or the equivalent in your client language.

If you have C3A9, then you need SET NAMES utf8 .

Your table needs to have CHARACTER SET utf8 either on the table or the column(s).

If this does not address your question, please elaborate.

A lot more discussion is found in my charset blog .