The searched case statement is the much more powerful cousin of the simple case statement. The searched case statement is like an if…then…else structure, and can be used to conditionally search and replace values using logical operators and multiple conditions. Let's look at an example: SELEC...
现在我想转换成case语句。 select sum(case when person_status_id in (3,4,6) then (select 1 as x, count(*) as cnt from PERSON w and w.UPDATED_ON> (sysdate-30) )v end) as Completed, sum(case when person_status_id in (5,7,13) then (select 1 as x, count(*) as cnt from P...
Therefore, for alerts to pick a new time zone of the Web browser (local) system, the user must edit the time zone preferences from this system in particular, otherwise the old time zone (time zone when this user preference was last edited) values continue to be used. For a complete ...
When SMON is trying to remove non-existent objects and fails because there are duplicates, multiple nonexistent objects with same name. This query will returned many objects with same name under SYS schema: select o.name,u.user# from user$ u, obj$ o where u.user# (+)=o.owner# and o....
When a cell gets a Smart Scan-enabled query from the database node via iDB, it checks which regions of the storage will not contain the data. For instance if the query predicate states where rating = 3, a region on the disk where the minimum and maximum values of the column RATING ...
TheDryRunoption checks if reading data on the Oracle database can be parallelized across multiple fetchers and stops before loading any rows. If parallelizing the reads is possible,ttLoadFromOraclereturns success. Otherwise it returns an error. This option is not used by default. Valid values ar...
(for example, using page processes, computations, or queries). However, attempts to externally set the values of application items or page items of type Display as text (does not save state) will result in their values being escaped when they are saved in session state. Be aware that ...
(一)kernel.shmall = 2097152 # kernel.shmall参数是控制共享内存页数。Linux 共享内存页大小为4KB,共享内存段的大小都是共享内存页大小的整数倍。 如果一个共享内存段的最大大小是16G,那么需要共享内存页数是 16GB/4KB = 16777216KB/4KB = 4194304(页),也就是64Bit系统下16GB物理内存, ...
Allowed values are true and false (default). If you are using Oracle version 2.0 (Preview), this property will only be allowed to be set when supportV1DataTypes is true. No partitionOptions Specifies the data partitioning options used to load data from Oracle. Allowed values are: None (...
Oracle RAC Cluster (Single/Multiple Nodes, Automatic Storage Management, Oracle Cluster File System, Data Guard) Oracle RDBMS Server (Standard and Enterprise Editions) Oracle Retail (Retek) Oracle SQL*Plus/iSQL*Plus Oracle TimesTen In-Memory Database ...