Oracle

1. Knowledge Points: Can be read against the following record screen view, sequence, index, Synonym Sql>--view: Virtual table sql>--View advantages: Simplify complex queries, limit data access (more banks), provide independent data, the same data

The following scripts can be used to check for huge line numbers:--PO requisitionsSELECT * from Po_requisition_lines_all where line_num > 1000000000;--PO LinesSELECT * from Po_lines_all where line_num > 1000000000;--Receiving supplySELECT * from

? Configure the Flashback database? Perform a flashback database operation? Monitoring the Flash back database Flash back to the database Flash back database operation:? Functions like a rewind button for a database? You can use the

believe that the 99 SQL, Oracle Basic written test is just like playing (the most complete, the most classic entry-level Oracle query statement)1. Select * from EMP;2. Select Empno, ename, job from EMP;3. Select empno number, ename name, job work

To completely uninstall the oracle11g step:1. Start-> Settings-> Control Panel-> Management Tool-> Service stop all Oracle services. 2, Start-> Program->oracle-orahome81->oracle installation products-> Universal Installer, click "Uninstall Product"-"

 Table, select statement, cursor: The return result can be a collection.Note: The result of the cursor is a collection.--Query and print employee's name and salary set Serveroutput on/* cursor: 1. Cursor properties:%isopen %rowcount (number of

Today, when installing Oracle Warehouse Builder 11.2 on RHEL6.4, the last step of the error, open the log to see the following information:Main. TaskScheduler Timer[5][email protected]:27:55.055:00>

Achieve the following goals1, monitor the Oracle database monitoring and the status of the instance, if the monitoring or the instance hangs, then starts, and the Mail informs, the script attempts to start the corresponding service2, if the service

ASMSupportRolling Upgrades, forASMhit Patchsets or migrate to a new version you can use the rolling upgrade method to provide a higher levelthe lower level of high availability. Note that in order to use ASM's rolling migration special, the ASM

You should first join the configuration file for connection pooling and database connections:Database Connection pack: Ojdbc6.jarDatabase Connection Pool Package: Commons-pool2-2.2.jarCommons-dbcp2-2.0.jarDatabase connection configuration file:

The concept of partitioning tables and tablespaces is distinguished between the design of Oracle partition tables: tablespace: A table space is a collection of one or more data files, all of which are stored in the specified table space, but are

There are several ways to import text files into an Oracle database, but if you import a text file that is too large, such as a 5g,10g text file, there are some ways to do it, such as the import text feature in Plsql developer, and if the text file

before 11g, maintaining the partition requires manual. After 11g, interval is used to automate the expansion of partitions, simplifying maintenance.According to annual INTERVAL (Numtoyminterval (1, ' Year '))according to Month INTERVAL

The Oracle data Access Components (ODAC) library provides a number of non-visual components for Borland delphi,c++ Builder and Kylix. They are used to access Oracle relational database systems. Similar to BDE, ODAC is also one of the alternative

-- Source Database Configuration [Oracle @ db12c ~] $ Sqlplus/as sysdbaSQL * Plus: Release 12.1.0.1.0 Production on Tue Apr 8 14:24:15 2014Copyright (c) 1982,201 3, Oracle. All rights reserved.Connected:Oracle Database 12c Enterprise Edition Release

Create a Data Group All group functions treat the table as a large information group. However, you sometimes need to divide the table into several smaller groups. You can use the group by clause to complete this task. Create a Data GROUP: group by

Before using compression, we can estimate the effect of compression.Dbms_comp_advisor can be used before 11gr2. The specific code is provided in the attachment. You only need to execute two files, dbmscomp. SQL and prvtcomp. plb, and then use the

I. Basic Concept: Oracle started at 11g and provided a new method for fixed execution plans, namely, SQL plan baseline, Chinese name SQL Execution plan baseline (baseline for short ), it can be considered as an improved version of OUTLINE or SQL

1. create table [schema.] table (column datatype [, column datatype]…) [TABLESPACE tablespace] [PCTFREE integer] [PCTUSED integer] [INITRANS integer] [MAXTRANS integer] [STORAGE storage-clause] [LOGGING | NOLOGGING] [CACHE | NOCACHE]; note :? Schema:

I. DescriptionStarting from oracle 10 Gb, oracle introduced Segment Advisor to check whether there are bucket-related recommendations in the database, and starting from 10gR2, oracle automatically schedules and runs a segment advisor job, regularly