mysql创建表语句转换为oracle创建表语句

SELECT CONCAT('CREATE TABLE ',T.TABLE_NAME,'  (') cre_sql FROM TABLES T  WHERE T.TABLE_NAME = 'basic_ent'

UNION ALL 

#字段信息

SELECT CONCAT(T.COLUMN_NAME,'   ',

       REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(T.COLUMN_TYPE,'varchar','varchar2'),'datetime','date'),

       'decimal','number'),'text','clob'),'bigint','NUMBER'),'tinyint','NUMBER'),'int','NUMBER'),'double','NUMBER') ,

       '  ',(CASE WHEN T.IS_NULLABLE = 'NO' THEN 'NOT NULL ' ELSE 'NULL' END), '  ,') ZD                                  

FROM COLUMNS  T WHERE  T.TABLE_NAME = 'basic_ent' 

UNION ALL

#主键信息

SELECT CONCAT('CONSTRAINT PK_',T.TABLE_NAME,' PRIMARY KEY (',GROUP_CONCAT(T.COLUMN_NAME SEPARATOR ','),')')  

 FROM COLUMNS  T WHERE  T.TABLE_NAME = 'basic_ent' AND T.COLUMN_KEY = 'PRI'

UNION ALL

SELECT ') ;'

UNION ALL

#表注释

SELECT CONCAT('COMMENT ON table','  ',T.TABLE_NAME,'  IS  ''',T.TABLE_COMMENT,'''  ;') FROM TABLES T  WHERE T.TABLE_NAME = 'basic_ent'

UNION ALL

#字段注释

SELECT CONCAT('comment on column  ',T.TABLE_NAME,'.',T.COLUMN_NAME,'  IS  ''',T.COLUMN_COMMENT,'''  ;')                                    

FROM COLUMNS  T WHERE  T.TABLE_NAME = 'basic_ent' ;