SparkSQL讀取MySQL資料tinyint欄位轉換成boolean型別的解決方案
阿新 • • 發佈:2021-01-21
Oracle的備份與還原-相關步驟
1、建立表空間:CREATE TABLESPACE tablespace_name DATAFILE 'D:\OracleDB\XXXX.dbf' size 1000M autoextend on next 200M maxsize unlimited EXTENT MANAGEMENT LOCAL SEGMENT SPACE MANAGEMENT AUTO;
建立表空間:CREATE TABLESPACE tablespace_name1 DATAFILE 'D:\OracleDB\XXXX.dbf' size 2000M autoextend on next 200M maxsize unlimited EXTENT MANAGEMENT LOCAL SEGMENT SPACE MANAGEMENT AUTO;
–刪除使用者名稱為test使用者
drop user test cascade;
建立使用者:create user test identified by test default tablespace tablespace_name1 ;
使用者授權:grant dba,connect to jzgr;
目錄:create or replace directory dbback as 'D:\OracleDB\bak';
目錄授權:grant read, write on directory dbback to test;
初次還原:impdp system/[email protected] directory=dbback dumpfile=XXXX_DB20210521.DMP schemas=jjga logfile=import.log version=10.2.0
還原:impdp system/[email protected] directory=dbback dumpfile=XXXX_DB20210521.DMP TABLE_EXISTS_ACTION=TRUNCATE schemas=jjga logfile=import.log version=10.2.0
備份:expdp system/[email protected] directory=DBBACK DUMPFILE= XXXX20201209.dmp TABLESPACES=tablespace_name1 version=10.2.0