MySQL 命令集合

SELECT CONCAT(‘ALTER table ‘,t2.table_schema,‘.‘,t2.table_name,‘ CHANGE ‘,‘ \`‘,t2.column_name,‘\` \`‘,UPPER(t2.column_name),‘\` ‘,  
       t2.column_type,‘ ‘,CASE WHEN t2.is_nullable=‘NO‘ THEN ‘not null‘ ELSE ‘null‘ END,‘ COMMENT ‘‘‘,t2.column_comment,‘‘‘;‘) AS c  
FROM information_schema.tables t1, information_schema.columns t2  
WHERE t1.table_schema = ‘yourusername‘  
   AND t1.table_type = ‘base table‘  
   AND t1.table_schema = t2.table_schema  
   AND t1.table_name = t2.table_name