SQL> alter table Books_master drop unused columns; Table altered. SQL> select * from DBA_UNUSED_COL_TABS where TABLE_NAME='BOOKS_MASTER'; no rows selected How to drop Multiple column We can specify multiple column during drop command SQL> alter table books_master drop (AUTHOR,TITLE); Table...
SMON 会每 15 分钟将 shared pool 中的 predicate columns 的数据刷新到 col_usage$基表中(until periodically about every 15 minutes SMON flush the data into the data dictionary),另外当 instance shutdown 时 SMON 会扫描 col_usage$并找出已被 drop 表的相关 predicate columns 记录,并删除这部 分”orph...
Virtual columns 虚拟列- Oracle 11g virtual table columns are columns that are actually functions ("create table t1 (c1 number, c2 number, c3 as (c1+c2) virtual"), and similarly, virtual indexes that are based on functions. Also seeOracle 11g function-based virtual columns. S...
Oracle BAM Administrator Figure 2â13 Oracle BAM Architect User Interface Oracle BAM Architect provides access to the Data Objects, Enterprise Message Sources (EMS), External Data Sources (EDS), and Alerts configuration pages with a drop-down list in the upper left corner of the ...
5、IMP-00093: Inconsistency between dumpfile constraint definition for table PNR_INSPECT_PLAN_ITEM with columns ("ID") 原因:起因是在导入的过程中要导入系统生成的约束,类似SYS_C0027639, metalink上只提到了这个原因,但是以前很多次的imp应该都是有这样系统生成的约束名,并没有报错过,所以应该还是有另外的...
Action: Drop index and set parallel to 1 in create index. DRG-10581 indirect datastores cannot be used with long or lob text columns Cause: An attempt was made to create an index on a log or LOB column using an indirect datastore such as the file or URL datastores. Action: Use a ...
The PL/SQL block in Example 6-10 queries multiple values into PL/SQL tables, with and without bulk binds. Without bulk bind, PL/SQL sends a SQL statement to the SQL engine for each selected employee, leading to context switches that slow performance. ...
A problem is fixed where anALTER STANDBY PAIR...DROP SUBSCRIBERor anALTER REPLICATION...DROP SUBSCRIBERstatement is given priority over user workloads to avoid deadlocks when dropping a subscriber. (BugDB # 29278422) A problem is fixed where the output of columns in a Replication Conflict Resolut...
Add additional columns to data sets to create calculations. Simple drag-and-drop capabilities with Excel-like formulas allow business users to create sophisticated data sets with all the metrics needed. When more complex transformations require custom logic, Oracle Analytics allows users to experience ...
Control SQL Server export behavior DROP_ROWVERSION PostgreSQL has no equivalent to rowversion datatype and feature, if you want to remove these useless columns, enable this directive. Columns of datatype 'rowversion' or 'timestamp' will not be exported. CASE_INSENSITIVE_SEARCH Emulate the same ...