Tại sao rất nhiều nguồn cấp dữ liệu trong một tập tin mysql?
cat -A dfs.MYI M-~M-~^G^A^@^@^AT^@M-0^@d^@M-D^@^A^@^@^A^@^X^A^@^@^@^@^@M-^?^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@M-^?M-^?M-^?M-^?M-^?M-^?M-^?M-^?^@^@^@^@^@^@^D^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@"M-,^@^@^@^@^@^@^@^@^@^@^@^@M-^?M-^?M-^?M-^?M-^?M-^?M-^?M-^?M-^?M-^?M-^?M-^?M-^?M-^?M-^?M-^?^@^@^@^@^@^@^@^@Q:^UM-a^@^@^@^@^@^@^@^A^@^@^@^@Q:^UM-a^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^A^@^@^@^@^@^@^D^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^D^@^@^@^G^@^@^@^D^@^@^@^D^@^@^@^T^@^@^@^B^@^@^@^@^F^F^A^@^@^@^@^@^D^@^@^P^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^A^A^@^A^D^@^@^I^@^I^@^I^L?^@^@^@^@^@@^@^C^@^@^@^A^@^@^@^@^@^@^@^A^@^@^@^@^@^@^C^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@ ^ @ là một ký tự đặc biệt trong vim có nghĩa là nguồn cấp dữ liệu, Tại sao có nhiều nguồn cấp dữ liệu trong tệp mysql?