select owner as schema_name, table_name, column_id, column_name, data_type, data_length from sys.all_tab_cols where data_type in ('CHAR', 'VARCHAR', 'VARCHAR2', 'NCHAR', 'NVARCHAR2', 'CLOB', 'NCLOB') and owner not in ('ANONYMOUS','CTXSYS','DBSNMP','EXFSYS', 'LBACSYS', ...
Steps: === 1) Execute below query to find the constraint name: 执行下面的查询来找到约束名: SQL> select owner, constraint_name,table_name,index_owner,index_name from dba_constraints where (index_owner,index_name) in (select owner,index_name from dba_indexes where tablespace_name='<tablespace...
event order by 3; ---连接数状态: select inst_id,status,count(*) from gv$session where type<>'BACKGROUND' group by inst_id,status order by 1,3; ---查看全表扫: set linesize 200 pagesize 40 column program format a16
select * from user_tab_comments -- 查询本用户的表,视图等 select * from all_col_comments --查询所有用户的表的列名和注释. select * from user_col_comments -- 查询本用户的表的列名和注释 select * from all_tab_columns --查询所有用户的表的列名等信息(详细但是没有备注). select * from user_...
ALL_TAB_COLUMNS表记录了所有表的字段信息,其中: TABLE_NAME字段:表示表名称。 COLUMN_NAME字段:表示此表的此字段的名称。 DATA_TYPE字段:表示此表的此字段的类型。 DATA_LENGTH字段:表示此表的此字段的长度。 COLUMN_ID字段:表示此表的此字段的序号,1表示第一个字段,2表示第二个字段,以此类推。 在SQL下输入...
exp system/manager buffer=64000 file=/backup/area.dmp owner=bill tables=area 这样用户 bill 的表 area 就被导出到文件中。 需要注意的参数是 Inctype,这个参数可以取一下三个值: Complete(全备份):把数据库中所有数据对象导出到 dump 文件中,只有具有 Exp_full_database 的用户有使用这个参数的权限。
IMPORT FOREIGN SCHEMA will create foreign tables for all objects found in ALL_TAB_COLUMNS. That includes tables, views and materialized views, but not synonyms. These are the supported options for IMPORT FOREIGN SCHEMA: case: controls case folding for table and column names during import The poss...
Check if tables having Spatial columns(columns having datatype SDO_GEOMETRY) exist: --检查是否有表使用Spatial列,即列的类型为:SDO_GEOMETRY. set pages 200 col owner for a20 col table_name for a30 col column_name for a25 /* Formatted on 2012/3/8 13:48:49 (QP5v5.185.11230.41888) */ ...
ColumnExplanation USERNAME Name of the user USER_ID Numeric ID assigned to the user CREATED Date that user was created DBA_USERS If you need to find out all users that exist in Oracle or require more information about the user, there is also another system table called DBA_USERS. The synta...
SQL> select OWNER,CONSTRAINT_NAME ,COLUMN_NAME,POSITION from User_cons_columns where TABLE_NAME='DEPT'; How to find constraint by name in Oracle select CONSTRAINT_NAME ,INDEX_NAME,CONSTRAINT_TYPE,Search_condition,R_CONSTRAINT_NAME R_NAME from user_constraints where CONSTRAINT_NAME='&1' ...