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 cmd>mysqldump -B repltest --opt > xxx.sql
 cmd>mysqldump --databases repltest --opt > xxx.sql
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 cmd>mysqldump -B repltest --table t1 t2 --opt > xxx.sql
    5.µ¼³öÌø¹ýÌØ¶¨±í
 cmd>mysqldump -B repltest --ignore-table=repltest.t1 --ignore-table=repltest.t2 --opt > xxx.sql
   
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