In addition, usingread-only materialized views eliminates the possibility of a materialized viewintroducing data conflicts at the master site or master materialized view site,although this convenience means that
A materialized view is a database object that contains the results of a query. They are local copies of data located remotely, or are used to create summary tables based on aggregations of a table's data. Materialized views, which store data based on remote tables are also, know as snapsh...
Additionally, there are some cases where Oracle query rewrite will not access materialized views and will miss opportunities to access pre-aggregated data where MicroStrategy aggregate navigation of real summary tables would not miss the opportunity. For example, suppose a base table exists at the Da...
In addition, usingread-only materialized views eliminates the possibility of a materialized viewintroducing data conflicts at the master site or master materialized view site,although this convenience means that updates cannot be made at the remotematerialized view site. The following is an example of ...
2@@@create a materialized view for that sql statement sql> conn sh/sh sql> ed CREATE MATERIALIZED VIEW cust_sales_mv ENABLE QUERY REWRITE AS SELECT c.cust_id , SUM(amount_sold) AS amount FROM sales s, customers c WHERE s.cust_id=c.cust_id GROUP...
CREATE MATERIALIZED VIEW foreign_customers FOR UPDATE AS SELECT * FROM sh.customers@remote cu WHERE EXISTS (SELECT * FROM sh.countries@remote co WHERE co.country_id = cu.country_id); The following example creates a materialized view on two source tables: times and produc...
To migrate large datasets efficiently, you can use Oracle materialized view replication. With replication, you can keep the target tables synchronized with the source tables. Thus, you can switch over to Amazon RDS later, if needed.
CREATE MATERIALIZED VIEW CREATE TRIGGER执行该过程也需要该特权COPY_TABLE_DEPENDENTS。 要让用户使用包重新定义其他模式中的表,必须授予用户以下权限: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 CREATEANYTABLEALTERANYTABLEDROPANYTABLELOCKANYTABLESELECTANYTABLE ...
Some materialized views contain only joins and no aggregates (for example, when a materialized view is created that joins the sales table to the times and customers tables). The advantage of creating this type of materialized view is that expensive joins are precalculated. ...
CREATE MATERIALIZED VIEW LOG ON PS_RA_CMPGN_WAVE WITH ROWID, SEQUENCE(BUSINESS_UNIT,RA_CAMPAIGN_ID,RA_CMPGN_WAVE_ID,RA_OFFER_ID) INCLUDING NEW VALUES; CREATE MATERIALIZED VIEW LOG ON PS_RA_PROMO_OFFER with ROWID, SEQUENCE(SETID,RA_PROMOTION_CODE, CAB_SOURCE_YEAR) INCLUDING NEW VALUES; ...