Forcing the Optimizer to Use an Index You can force the optimizer to use an index by using several techniques. You can use an INDEX hint (there are several of … - Selection from Expert Indexing in Oracle Database 11g: Maximum Performance for Your Datab
authenticate(String, String, String) - Static method in class oracle.security.xs.XSAuthenticationModule Authenticates the user against the Database. C checkAcl(Session, AclId, List<String>) - Static method in class oracle.security.xs.XSAccessController Checks for mutiple privileges. checkAcl(Session...
database file storage on,3.1.3 grid home and Oracle base restriction,2.4.3.1 default path for,2.14 disk space for,2.5 unlocking,5.4 grid infrastructure owner (grid),2.4.5.1.1 grid naming service.SeeGNS grid user,2.4.5.1.1 group IDs ...
索引( Index )是常见的数据库对象,它的设置好坏、使用是否得当,极大地影响数据库应用程序和Database 的性能。虽然有许多资料讲索引的用法, DBA 和 Developer 们也经常与它打交道,但笔者发现,还是有不少的人对它存在误解,因此针对使用中的常见问题,讲三个问题。此文所有示例所用的数据库是 Oracle 8.1.7 OPS on...
In this tutorial, you have learned how to use the Oracle function-based index to speed up queries that involve functions. Quiz Was this tutorial helpful? Yes No Previously Oracle UNIQUE Index Up Next Oracle Bitmap Index Search for: Getting Started What Is Oracle Database Install Oracle Da...
http://download.oracle.com/docs/cd/E11882_01/server.112/e16508/datainte.htm#CNCPT1642 uniquekey constraint requires that every value in a column or set of columns beunique. No rows of a table may have duplicate values in a column (the uniquekey) or set of columns (the...
Plans Sign In Try Now Oracle Database Administration: The Essential Refe by Buy on Amazon Name ALTER INDEX REBUILD PARTITION Synopsis ALTER INDEX [schema.]index_name REBUILD PARTITION partition_name [INITRANS integer] [MAXTRANS integer] [PCTFREE integer] [LOGGING | NOLOGGING] [PARALLEL ( {...
Oracle ADG上的列式存储支持Oracle ADG上的列式存储支持 1、数据泵在导入时一般情况下只需指定parallel>1即可在创建索引时候使用并行,导入时可以从trace文件中看到数据泵采用并行创建索引; 2、创建索引时并行度可能会等于parallel*2,这是因为oracle产生了两组query slave set,一组用来扫描表,一组用来创建索引; ...
DBA_LOBS displays the BLOBs and CLOBs contained in all tables in the database. BFILEs are stored outside the database, so they are not described by this view. This view’s columns are the same as those in ALL_LOBS. https://docs.oracle.com/en/database/oracle/oracle-database/12.2/ref...
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