Oracle

Oracle merge into usage example   Purpose:Merge into solves the problem of using data from Table B and new table A. If table A does not exist, the data from Table B is inserted into Table; Syntax: Merge into [your table-name] [rename your table

When you use rollup or cube for group operations, fields with null values are generated, then, how can we tell whether the field itself is null or generated by rollup and cube? In this case, grouping (groupingfield) can be used to solve the

Mos documentation describes the upgrade Route: Complete check list for manual upgrades to11gr2 [ID 837570.1] Maclean's Blog contains several more intuitive images:

EBS R11 creates a view with client_info filter conditions to implement multi-ou shielding, R12 uses VDP (Virtual Private Database) for implementation. The associated package is mo_global and org_security.   Suppose we want employees to only view

 I. Description Previous instructions: Oracle cross-operating system migration Http://blog.csdn.net/tianlesoftware/article/details/7252788   Oracle cross-operating system migration Http://blog.csdn.net/tianlesoftware/article/details/7252788   Oracle

Connect by is used in structured queries. Its basic syntax is:Select... from tablename start by cond1Connect by cond2Where cond3;Simply put, a tree structure is stored in a table. For example, a table has two fields:The ID and parentid indicate the

 1. Description of the Rules Manager and Expression Filter components   Before the description, we first use the following SQL statement to check the components in the database: SQL> Col comp_id for A15 SQL> Col version for A15 SQL> Col comp_name

  Run the dbca command on a set of DB servers and report the following error:   [Oracle @ game_db ~] $ Dbca Exception in thread "Main" [Oracle @ game_db ~] $ [Oracle @ game_db ~] $ Exportdisplay = 1921.68.3.189: 0.0 [Oracle @ game_db ~] $

  First look at our data: SQL> select count (1) from Dave where cust_tel like '2013 ';   Count (1) ---------- 2723   In our Dave table, cust_tel had 0551 records starting with 2723. Now we have changed these records to 0556.   Let's test it using

 1. Description of the default tablespace In Oracle9i, if you do not use the default tablespace clause, all users will use the system tablespace as their default tablespace. You cannot specify a default tablespace for the database. The

When we define a very complex cursor, this cursor takes a long time to execute. During the execution of this cursor, other users modify the data of the table referenced by this cursor, does cursor get the data before or after modification? the

 Method 1: Use sqlplus 64-bit: [Oracle @ qs-wg-db2 ~] $ Sqlplus/As sysdba;   SQL * Plus: Release 10.2.0.5.0-productionon sun Sep 25 08:57:22 2011   Copyright (c) 1982,201 0, Oracle. All rights reserved.     Connected: Oracle Database 10g enterprise

  My colleague added a field to a table in the test database, prompting ORA-00054, resource busy. The table object lock is not released.   Use the following SQL statement to check the locking status of related objects in the system:   /* formatted

Function-based indexes takes effect only when the where condition uses the same column-based function as the index. Duzz $ Scott @ orcl> set autotrace on duzz $ Scott @ orcl> Create Table T1 as select * from Dept; table created. elapsed: 00:00:0

Read consistency ensures that the query results are consistent with the data at the time when the query is initiated, regardless of whether other transactions have changed the data during the query.   Assume that we have the following function to

When you look at Oracle constraints, you can see enable novalidate, which means to enable constraints for data from now on and later, regardless of the previous data. However, there was a small problem during the experiment: SQL> Create Table dept

When creating an Oracle database, we use dbca in most cases, which is simple, convenient, and more automatic. today we will try to create a database manually using the command line method, it has a special flavor. Oracle software version: 10gr2

Record the experiment that we just created to configure multiple listeners for a database (t02). The process is a little tortuous.   (1) added two test listeners. The configuration content of listener. ora (you can manually edit the file or use

Rollup will gradually remove a field on the right from the right to the left Based on the field following group by, and gradually sum up, Cube sums all the combinations of fields after group.   Cube eg1:  Select department_id, job_id, sum (salary)

I hope you have already read Article basics of multi org In R12. A fewQuestions come to mind when we think about multi org In R12. the best wayAnalyze those questions is by opening package mo_global. Don't worry if you areNot yet on R12, package