1 CREATE TABLE sh.sales_xt 2 ORGANIZATION EXTERNAL 3 (TYPE oracle_datapump 4 DEFAULT DIRECTORY data_file_dir 5 LOCATION ('sales_xt.dmp') 6 ) 7* AS SELECT * FROM sh.sales SYS@ocp> / Table created. @@@ @@@Note: here no DML for external table SYS@ocp> select count(*) from sh....
1)external table example01 1@@@create a external table. guide: External table are read-only. No DML operations are allowed. No create indexes on an external table. No backup the external using RMAN. Create an Externall Table: ~The metadata,which describes how the data looks to Oracle, in...
You can, for example,select, join, or sort external table data. You can also create views and synonyms for external tables.However,no DML operations (UPDATE, INSERT, or DELETE) are possible, and no indexes can be created, on external tables. External tables provide a framework to unload th...
drop table ext_student; create table ext_student( id varchar2(4), name varchar2(20), major varchar2(15), score number ) organization external ( type ORACLE_LOADER default directory ext_data_dir access parameters( records delimited by newline badfile ext_bad_dir :'example%a_%p.bad' logfil...
通过CREATE TABLE...ORGANIZATION EXTERNAL语句定义外部表的元数据。可以将此外部表定义视为允许对外部数据运行任何SQL查询而无需首先将外部数据加载到数据库中的视图。访问驱动程序是用于读取表中外部数据的实际机制。使用外部表卸载数据时,将根据SELECT语句中的数据类型自动创建元数据。
%ais replaced by the agent number of the current process. The agent number is the unique number assigned to each parallel process accessing the external table. This number is padded to the left with zeros to fill three characters. For example, if the third parallel agent is creating a file...
Many examples in this chapter show aCREATE TABLE...ORGANIZATION EXTERNALstatement followed by a sample of contents of the datafile for the external table. These contents are not part of theCREATE TABLEstatement, but are shown to help complete the example. ...
scott/tiger foo'; an example of the latter is 'sqlldr control=foo userid=scott/tiger'.One may specify parameters by position before but not after parameters specified by keywords.For example,'sqlldr scott/tiger control=foo logfile=log'is allowed,but'sqlldr scott/tiger control=foo log'is not...
29、R2(30)NOT NULLName of the tablespace to which the file belongsBYTESNUMBERSize of the file in bytesBLOCKSNUMBERNOT NULLSize of the file in Oracle blocksSTATUSVARCHAR2(9)File status: AVAILABLE or INVALID (INVALID means that the file number is not in use, for example, a file in a tabl...
For example, you can store the cursor on another stream, or a file on a VM, or an Object Storage bucket. When your consumer restarts, read the offset of the last message that you processed and then create a cursor of type AFTER_OFFSET and specify the offset that you just got. Kafka ...