This chapter describes ways to improve Oracle Business Intelligence query performance, including a performance tuning overview and information about monitoring system metrics. It also describes how to manage and
I am using the query bellow to check the usage of tablespaces in my oracle DBs: select t.tablespace_name, t.size_mb, f.free_mb, round((f.free_mb*100)/t.size_mb,2) percent_free from (select tablespace_name, round(sum(bytes)/1024/1024,2) size_mb from dba_data_files group by t...
Out of the core DBs Postgres and Oracle support RETURNING, and it is easy to deduce the value when using SQLite as there aren't concurrent transactions. When using MySQL it seems the best approach is to manually allocate a chunk from the sequence, assign the values to objs and then save ...
The Oracle optimizer uses two different methods to recognize when to rewrite a query in terms of one or more materialized views. The first method is based on matching the SQL text of the query with the SQL text of the materialized view definition. If the first method fails, the optimizer ...
Among Django’s built-in database backends, MySQL 8.0.2+, PostgreSQL, and Oracle support window expressions. Support for different window expression features varies among the different databases. For example, the options in asc() and desc() may not be supported. Consult the documentation for you...
version 5.7 5.4.5 The Slow Query Log The slow query log consists of SQL statements that take more thanlong_query_timeseconds to execute and require at leastmin_examined_row_limitrows to be examined. The slow query log can be used to find queries that take a long time to execute and are...
1. Introduction XML processing in the Oracle XML DB is based on the XMLType datatype. This is a native datatype introduced Permission to copy without fee all or part of this material is granted provided that the copies are not made or distributed for direct commercial advantage, the VLDB ...
Oracle Enterprise Performance Reporting Cloud Service - Version 23.09.55 and later: Getting: "Error Occurred While Executing The Query. Check Your Query and Try Agai
This new functionality is only available when you connect to Calculation Views in SAP HANA Server version 2.0 or higher. The following sample query takes advantage of this new capability. In the past, you would get a "the value is not a cube" exception when applyingCube.CollapseAndRemoveColumns...
Query: displays the normalized query. Hover the cursor over the statement to see the full version. Or click the query to open theDetailspage. Database: the name of the database on which the query was executed. First Seen: the time and data at which this query was first seen on the da...