Window functions, which are now a key analytical feature in the analysis of big data, were first introduced in Oracle 8i (1999) and many developers use them to manage complex big data requirements. Oracle 10g (2003) introduced the SQL Model clause, which provides a spreadsheet-like what-if ...
Home page for Oracle's Analytical SQL capabilities accessible in SQL. Oracle continues to expand its set of statistical functions available in Oracle 12c Database for use far beyond basic querying, supporting a wide range of features and functions: rank
How to select the top-N rows per group with SQL in Oracle Database Chris Saxon18 minute read OGB Appreciation Day: SQL Pattern Matching (match_recognize) Use Cases Chris Saxon10 minute read How to convert rows to columns (PIVOT) and back again (UNPIVOT) with ... ...
Window function是OLAP的查询中比较常见的SQL construct,提供了“引用临近区域元组”的语义,这种语义使得一些分析型query的编写更加简单,可以避免不必要的相关子查询结构。此外,很多系统(Oracle/PolarDB) 内部也实现了用window function做subquery unnesting,避免相关子查询的低效执行,因此window算子本身的高效实现意义就更大...
Oracle has added many features that facilitate OLAP queries, and it is now possible to use the Oracle server directly for OLAP. The SQL language has been extended to provide analytical functions, such as ranking, moving window aggregates, period-over-period comparisons, ratio to report, statistic...
In Oracle Database release 12.2, the OLAP Option introduced the cube-organized materialized view. Data was loaded into the OLAP Option compressed cube and accessed transparently by SQL applications querying relational data using materialized view query rewrite. This allowed the OLAP compressed c...
The Oracle Fusion Data Intelligence applications currently leverage a smaller number of Overview Dashboards that provide high-level summary information. These can drill down to a larger number of Detail Dashboards. Each of the Detail Dashboards provide m
SQL_Statement SELECT b.rowid row_id ,b.AMB_CONTEXT_CODE ,b.ANALYTICAL_CRITERION_TYPE_CODE ,b.ANALYTICAL_DETAIL_CODE ,b.ANALYTICAL_CRITERION_CODE, b.GROUPING_ORDER ,b.DATA_TYPE_CODE ,b.VIEW_COLUMN_NUM ,t.name ,t.description,b.CREATION_DATE ,b.CREATED_BY ,b.LAST_UPDATE_DATE ,b.LAST_...
systems treat them as two individual events. When processing these two events on the OLAP side, a streaming system only guarantees they are applied in order while an OLAP query may still observe the intermediate results of the transaction (i.e., a single SQL operation in our former example)...
Unified Data Perspective: OLAP allows businesses to manage multiple functions like marketing, finance, and production on a single platform. This integrated view helps managers and decision-makers understand the greater context and address issues more effectively. ...