Oracle常见查询表结构语句获取表:
select table_name from user_tables; //当前⽤户的表
select table_name from all_tables; //所有⽤户的表
select table_name from dba_tables; //包括系统表
select table_name from dba_tables where owner='⽤户名'
user_tables:
table_name,tablespace_name,last_analyzed等
dba_tables:
ower,table_name,tablespace_name,last_analyzed等
all_tables:
ower,table_name,tablespace_name,last_analyzed等
all_objects:
ower,object_name,subobject_name,object_id,created,last_ddl_time,timestamp,status等
获取表字段:
select * from user_tab_columns where Table_Name='⽤户表';
select * from all_tab_columns where Table_Name='⽤户表';
select * from dba_tab_columns where Table_Name='⽤户表';
user_tab_columns:
table_name,column_name,data_type,data_length,data_precision,data_scale,nullable,column_id等
all_tab_columns :
ower,table_name,column_name,data_type,data_length,data_precision,data_scale,nullable,column_id等
oracle数据库表结构怎么看dba_tab_columns:
ower,table_name,column_name,data_type,data_length,data_precision,data_scale,nullable,column_id等
获取表注释:
select * from user_tab_comments
user_tab_comments:table_name,table_type,comments
--相应的还有dba_tab_comments,all_tab_comments,这两个⽐user_tab_comments多了ower列。
获取字段注释:
select * from user_col_comments
user_col_comments:table_name,column_name,comments
获取表约束
SELECT constraint_name, table_name, r_owner, r_constraint_name FROM all_constraints
WHERE table_name = 'table_name' and owner = 'owner_name';

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