1600 PMP mock questions 1400 CAPM mock questions 800 SCJP 6 mock questions 600 OCAJP 7 mock questions 590 OCPJP 7 mock questions 556 SCWCD 5 mock questions 500 OCEJWCD 6 mock questions pdfDownload (java,struts, hibernet etc)

ORACLE Tutorials

Automatic Refresh Times for Materialized Views: Example


Automatic Refresh Times for Materialized Views: Example

The following statement creates the complex materialized view all_customers that queries the employee tables on the remote and local databases:

CREATE MATERIALIZED VIEW all_customers
PCTFREE 5 PCTUSED 60
TABLESPACE example
STORAGE (INITIAL 50K NEXT 50K)
USING INDEX STORAGE (INITIAL 25K NEXT 25K)
REFRESH START WITH ROUND(SYSDATE + 1) + 11/24
NEXT NEXT_DAY(TRUNC(SYSDATE), 'MONDAY') + 15/24
AS SELECT * FROM sh.customers@remote
UNION
SELECT * FROM sh.customers@local;


Oracle Database automatically refreshes this materialized view tomorrow at 11:00 a.m. and subsequently every Monday at 3:00 p.m. The default refresh method is FORCE. The defining query contains a UNION operator, which is not supported for fast refresh, so the database will automatically perform a complete refresh.

The preceding statement also establishes storage characteristics for both the materialized view and the index that the database uses to maintain it:

*The first STORAGE clause establishes the sizes of the first and second extents of the materialized view as 50 kilobytes each.
*The second STORAGE clause, appearing with the USING INDEX clause, establishes the sizes of the first and second extents of the index as 25 kilobytes each.

Reviews and Comments


PMP, CAPM, PMI is a registered certification mark of the Project Management Institute, Inc

Copyright © www.techfaq360.com 2016


About US | Contact US | Privacy Policy | Terms and Conditions  | Website disclaimer  | Cancellation and Refund Policy  | Shipping & Delivery Policy