隨記: MySQL 預設的字集是不分大小寫,所以…

o MySQL 預設的字集是不分大小寫 (not case sensitive)
. 所以 jjdai 和 JJDai 不可能同時加到一被設定成 primary key 的欄位。
. 要故意做大小寫比較的話可用:
SELECT * FROM ub WHERE nickname LIKE ‘JJDai’ COLLATE big5_bin;
SELECT * FROM ub WHERE nickname LIKE binary ‘jjdai’ LIMIT 0 , 30
. 將字集設定成 binary 即可區分出大小寫。

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