【Oracle】用sql查看表字段类型

SQL：select column_name,data_type from all_tab_columns where table_name=upper('table_name');

执行：

SQL> column column_name format a30;
SQL> column data_type format a30;
SQL> select column_name,data_type from all_tab_columns where table_name=upper('gpcc_disk_history');

COLUMN_NAME                    DATA_TYPE
------------------------------ ------------------------------
ID                             NUMBER
HOSTNAME                       NVARCHAR2
DISKSIZE                       NUMBER
USED                           NUMBER
CTIME                          DATE

END