3. Select the database to delete and click Finish. Managing Templates with DBCA DBCA templates are XML files that contain information required to create a database. Templates are used in DBCA to create new databases and duplicate existing databases. The information in templates includes database ...
When a statement is executed on the logical standby database, it will access the database link at that time. It is not possible to know if the information on the logical standby database is the same as it was at the time the statement was executed on the primary database. For example,...
Each request for data in a clustered table involves at least two I/O operations, one for the cluster index and one for the data. A hash cluster stores related data rows together, but groups the rows according to a hash value for the cluster key. The hash value is calculated with a ...
SQL Server Error 21642 Is Raised Regarding a Duplicate Linked Server Login When an Oracle Publisher is initially configured, a linked server entry is created for the connection between the Publisher and the Distributor. The linked server has the same name as the Oracle TNS service name. If you...
one for each time the index appears in an operation in the plan. Then, as expected, num_starts and rows_returned match the sum of the two Starts and A-Rows. But here’s the change in dba_index_usage –spot the oddity: 1 2 3 4 5 6 7 NAME : T1_PK OWNER : TEST_USER TOTAL_...
By default, DRS retains a task in theConfigurationstate for three days. After three days, DRS automatically deletes background resources, but the task status remains unchanged. When you configure the task again, DRS applies for resources for the task again. In this case, the IP address of ...
oracle中对insert into on duplicate key 语句的替代 insert into on duplicate key 是mysql中的语句,oracle中没有直接对应。不过采用merge into语句可以起到相同效果。 比如有一个表TTT,我们在no,start_time,code三个字段上建立了唯一索引;希望插入新记录时,如果在唯一索引上有重复的就更新,没有就直接插入。
BulkInsertOrUpdate method can be used when there is need for both operations but in one connection to database. It makes Update when PK(PrimaryKey) is matched, otherwise does Insert.BulkInsertOrUpdateOrDelete effectively synchronizes table rows with input data. Those in Db that are not found...
lib export ORACLE_HOME=/usr/lib/oracle/12.2/client64 perl -MCPAN -e 'install DBD::Oracle' If you are running for the first time it will ask many questions; you can keep defaults by pressing ENTER key, but you need to give one appropriate mirror site for CPAN to download the modules....
ORA-10151: Force duplicate dependency removal ORA-10152: CBO don't consider function costs in plans ORA-10153: Switch to use public synonym if private one does not translate ORA-10154: Switch to disallow synonyms in DDL statements ORA-10155: CBO disable generation of transitive OR-chains ...