查询当前用户下的所有表信息

select distinct TABLE_COLUMN.*,
TABLE_NALLABLE.DATA_TYPE,
TABLE_NALLABLE.NULLABLE
from (select distinct utc.table_name  table_name,
utc.comments    table_comments,
ucc.column_name column_name,
ucc.comments    column_comments
from user_tab_comments utc, user_col_comments ucc
where utc.table_name = ucc.table_name
and utc.table_name not like '%_B'
and utc.table_name not like '%_Z'
and utc.table_name not like '%1%') TABLE_COLUMN,
(select distinct table_name, column_name, nullable, DATA_TYPE
from user_tab_cols
where table_name not like '%_B'
and table_name not like '%_Z'
and table_name not like '%1%') TABLE_NALLABLE
where TABLE_COLUMN.column_name = TABLE_NALLABLE.column_name
and TABLE_COLUMN.TABLE_NAME = TABLE_NALLABLE.table_name