批量修改表前缀 
                            
                                                    
                        
                    
                    
  
                    
                    SELECT
    CONCAT(
        'ALTER TABLE ',
        table_name,
        ' RENAME TO bk',
        substring(table_name, 5),
        ';'
    )
FROM
    information_schema. TABLES
WHERE
    table_name LIKE 'base_%';
                        
                        
                                            
          
          
          
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