--数据库导出表，字段名，长度，类型，字段注释，表注释语句

SELECT T1.TABLE_NAME 英文表名,

T1.COLUMN_NAME  字段名,

T1.DATA_TYPE || '(' || T1.DATA_LENGTH || ')'  字段类型及长度,

T2.COMMENTS  字段注释,

t3.COMMENTS  表注释

FROM USER_TAB_COLS T1, USER_COL_COMMENTS T2,user_tab_comments t3

WHERE T1.TABLE_NAME = T2.TABLE_NAME

AND T1.COLUMN_NAME = T2.COLUMN_NAME  and  t3.TABLE_NAME = t1.TABLE_NAME and    t1.TABLE_NAME LIKE 'GM_%'

--用这个好，可以查全部的

SELECT

c.table_name 英文表名 ,

t.COMMENTS 中文表名称,

cc.COLUMN_NAME 字段名,

cc.COMMENTS 字段注释 ,

c.DATA_TYPE || '(' || c.DATA_LENGTH || ')' 字段类型及长度

FROM

dba_tab_columns c

LEFT JOIN dba_col_comments cc ON c.table_name = cc.table_name

AND c.column_name = cc.column_name

LEFT JOIN dba_tab_comments t ON c.table_name = t.table_name

WHERE

c.OWNER = 'S_GMJXK'

AND c.TABLE_NAME LIKE 'GM_%'

ORDER BY

c.table_name;