Oracle

Analysis of effective cursor management"Thinking Analysis"Cursors can be understood as shared execution plans, and when SQL is not shared, there are two directions to the general approach:1. Adjust the size of the shared pool (share the execution

sql> create table test01     (no number not null,name  varchar (30)); 1. Modify the table name     SQL> alter table test01 rename  to test02; Table altered. Sql> desc test01error:ora-04043: object test01 does not existsql>  desc test02 Name          

This is the description of Oracle's backreference of regular expressionsAs you can see from the definition, a substring is included in the form of () in the matching expression, and can be referenced in the form of \? later. \1 corresponds to the

1. Use: clears the tables and indexes in the Oracle Recycle Bin (recyclebin) and frees the space associated with them, empties the Recycle Bin, or clears some of the deleted table spaces that are recorded in the tablespace. Note: You cannot

When we build an index, we add parallelism and parallel to the index, and this column index will be parallel. When accessing an index with a degree of parallelism, the CBO may consider parallel execution, which may cause problems such as using

This is going to be a couple of steps.take oracle10g as an example to illustrate the process of changing the SID name. If the database SID is called TestDB, now change to ORCL, there are the following 6 steps:1. Stop All Oracle Services1.1, Oracle's

2014-05-30 Baoxinjian in CapgeminiFirst, IntroductionThere have been some doubts about Oracle R12 Multi-organization access, so we've queried some of the relevant data and introduced the Oracle VPD technology that implements R12 MOACOracle VPD Full

After Oracle (64-bit) and PL/SQL Developer are installed, the following error occurs when PL/SQL is run: My PL/SQL DevelZ databases? Http://www.bkjia.com/kf/ware/vc/ "target =" _ blank "class =" keylink "> vcGVy0 + release/release + 0

1. index creation Syntax:Create uniuqe | bitmap index . ON . (| ASC | DESC, | ASC | DESC ,...)TABLESPACE STORAGE LOGGING | NOLOGGINGCOMPUTE STATISTICSNOCOMPRESS | COMPRESS NOSORT | REVERSEPARTITION | global partition Description1) UNIQUE | BITMAP:

In Oracle, the insert ALL statement is described as follows: 1. insert all unconditionally   Create table t1 (product_id NUMBER, product_name VARCHAR2 (80), month number); insert into t1 VALUES (111, 'apple', 1); insert into t1 VALUES (222, 'orange'

Due to demand changes, we need to change the field type of A type NUMBER (8, 2) to char. The general idea is as follows: To change the name of a field of the type to backup, add a field with the same name as the field of the type to be changed

Rediscovering Oracle's beautiful oraInst. locThe operating system version of the platform is amazing. Smart people will know it at a glance, and I will not have any code words!Oracle @ rh64 oraInventory] $ opatch lsinvOracle Interim Patch Installer

Analysis on "session management overhead" [Overview] During the optimization process, session management is a common problem, because the overhead of session maintenance is relatively high. [The process is as follows] Customer request (sid) →

This is Oracle's description of the backreference of the regular expression. From the definition, we can see that when a substring is included in the matching expression in the form of (), it can be followed \? . \ 1 corresponds to the first (), \ 2

First, you can download the instantclient from the oracle official website. To register an account, you must download the corresponding version. Otherwise, it will fail, I have uploaded the 10G and 11G versions. It is free to download: Uploading.

When synchronizing Oracle Data to sqlserver, you must first create a table on sqlserver. If we do not synchronize complex fields, we only consider the following four data types.Ing from Oracle to SQLServer: int-> int number-> decimal () number (p, s)

Today is. If you encounter a lib problem today, record it again. This is a case and a process of solving the problem. When we use sqlplus to log on to a unix database, problems such as: xxxxxx bad ELF interpreter: No such file or directory may occur.

Analysis of association Design [Paradigm] Ideally, any table in the database will correspond to an object in real life. For example, a player is an object, a team is an object, and a competition is an object, the competition result is an object, and

Duplicate reports ORA-01017 permission issuesEnvironment: OS:RedHat EnterPrise Linux 5.8x64 Cluster:Oracle Grid 11.2.0.4 Database:Oracle Database EnterPrise 11.2.0.4 Archive:RAC + DG During the configuration of DG today, the preliminary environment

The ASM security section describes various security configuration topics related to ASM, such as configuring userids and groupids required by ASM, and permissions for ASM, such as SYSOPER, SYSDBA, and SYSASM, finally, there is the ORACLE password