Oracle查询表结构、索引和备注

东皋长歌2023-11-01 19:44

1, ORACLE 查询表结构

sql 复制代码

SELECT table_name, column_name, data_type,DATA_LENGTH,COLUMN_ID,user_tab_comments,user_col_comments FROM USER_TAB_COLUMNS WHERE table_name =upper('T_Acc_Settle_Account');

SELECT * FROM user_tab_columns WHERE table_name='T_Acc_Settle_Account';

SELECT * FROM all_tab_cols WHERE table_name =upper('T_Acc_Settle_Account');

2, 查看oracle单个数据表包含的索引

sql 复制代码

SELECT * FROM user_indexes WHERE table_name=upper('T_Acc_Settle_Account');

3, 查看哪些表哪些字段包含指定类型

sql 复制代码

SELECT table_name, column_name, data_type,DATA_LENGTH,COLUMN_ID FROM all_tab_cols WHERE data_type =upper('NVARCHAR2');

4, 查询列的备注说明

sql 复制代码

SELECT * FROM user_col_comments WHERE table_name =upper('T_Acc_Settle_Account');

5, 查询表的备注说明

sql 复制代码

SELECT * FROM user_tab_comments WHERE table_name =upper('t_acc_merch_day_count');

6, 查询表里前100条数据，类似于mysql的limit

sql 复制代码

SELECT * FROM T_Acc_Settle_Account WHERE rownum<100;