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在phpMyAdmin我創建了一個唯一索引的列,在屏幕上我有以下的底部:在MySQL索引中,Collation =「A」是什麼意思?
Indexes:
Keyname = "[Name of column]"
Type = "BTREE"
Unique = "Yes"
Packed = "No"
Column = "[Name of column]"
Cardinality = "7"
Collation = "A"
Null = ""
Comment = ""
這到底是什麼整理「A」的意思? ANSI? ASCII?我的專欄是在utf8_unicode_ci中,即使使用utf8字符,它仍然保證是唯一的嗎?