Index Skip Scan nada mais é que o "split" logico de um indice composto, ou seja, se sua clausula WHERE não tiver todos os campos do indice composto, ele é dividido em menores sub-indices Exemplo: -------- SQL> create table teste(a number,b number); Table created. SQL> begin 2 for i in 1..1000 3 loop 4 insert into teste values(i, 56); 5 end loop; 6 end; 7 / PL/SQL procedure successfully completed. SQL> create index idx_teste on teste(a,b); Index created. SQL> analyze table teste compute statistics; Table analyzed. SQL> explain plan for select /*+ index_ss(teste idx_teste) */ * from teste where b=56; Explained. SQL> start ?\rdbms\admin\utlxpls.sql -------------------------------------------------------------------------------- | Operation | Name | Rows | Bytes| Cost | Pstart| Pstop | -------------------------------------------------------------------------------- | SELECT STATEMENT | | 1...
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ORACLE DATABASE 12C CLUSTERWARE ADMINSTRATION
ResponderExcluirThis Oracle Database 12c: Cluster ware Administration training will explore general cluster concepts and Oracle Cluster ware architecture. Work with expert Oracle University instructors through interactive instruction and hands-on exercises to reinforce your learning. Oracle Cluster ware is the cross platform cluster software required to run the Real Application Clusters (RAC) option for Oracle Database. It provides the basic clustering services at the operating system level that enable Oracle software to run in clustering mode. In earlier versions of Oracle (version 9i and earlier), RAC required a vendor supplied cluster ware like Sun Cluster or Veritas Cluster Server with the exception of Linux and Windows.
Benefits:
Learn how to make applications highly available using Oracle Cluster ware. You'll walk away with the ability to install,configure, manage and troubleshoot both standard and flex clusters. Furthermore, you will have developed the skills toupgrade and patch Cluster ware environments.
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