Oracle

depends on whether you want to be a DBA or a developer? The certificate is sure to be taken, just like having a driver's license to drive a car. Second, there are teachers to get you started. Entering the industry will be quick, otherwise it is

0. PrefaceBaidu above search information, are garbage information, and examples are mutual replication, there is no reference value, the most annoying is the need to install Oracle remote client, they are the idiots are mainly local, usually local

1. Create a temporary table spaceCREATE Temporary tablespace test_tempTempfile ' C:\oracle\product\10.1.0\oradata\orcl\test_temp01.dbf 'SIZE 32MAutoextend onNEXT 32M MAXSIZE 2048MEXTENT MANAGEMENT LOCAL;Generally starting from the second step, you

Oracle takes the intersection of data from two tablesKeyword: Oracle takes the intersection of data from two tables INTERSECTOracle, as a large relational database, often needs to extract the intersection data of two tables in daily applications.For

1.Basic usage of the row_number () over functionsyntax: Row_number () Over (PARTITION by column ORDER by column) For example: Row_number () Over (PARTITION by COL1 Order by COL2) is based on COL1 grouping, sorted by COL2 within the grouping, The

1. Prepare for 1.1 download Oracle 12c InstallerRefer to: http://www.wxzzz.com/1231.html articles can be downloaded smoothly.1.2 Unzip the downloaded two compressed filesUnzip the two compressed packets into the same directory, "database" and click

　　Please allow me to use such a interrogative sentence as the title of the article. In the face of a database product that occupies more than half of the market share of the global relational database, does the CIO really ask himself such questions

Create a normal statspack report user on the main librarySqlplus/as SYSDBASql>@?/rdbms/admin/spcreate.sqlSql>--Notice to cancel $oracle_home/sqlplus/glogin.sql some settingsSql>--some normal words will appear asking for password and tablespace and

function createstring (n_num in number) return VARCHAR2 isI integer default 0;V_token varchar2 (+) default ';BeginWhile I If MoD (Round (Dbms_random.value (1, 2), 2) > 0 Then--Generate charactersif (MoD (Round (Dbms_random.value (1, 2), 2) > 0) Then-

Since Oracle 8 (around 1997), the concept of partitioned Tables & partitioned Indexes (partitioned Tables & Indexes) has been introduced to adjust large tables and large indexes to improve performance and improve operational management capabilities.

The use of data pump really good, not only the export speed, and occupy small space, normal exp to a few hours as long as 10 minutes can be done, compression can reach more than First, EXPDP and IMPDP instructions for use Oracle Database 10g

Sequences in Oracle are typically used to generate serial numbers, so we need to reset them (such as resetting them every morning), although we can reset the sequence by recompiling, but this approach has drawbacks such as invalidating the stored

1 Viewing version information for Oracle (1) Connect to the database with the client, execute SELECT * from V$instanceView version Items (2) SELECT * FROM Product_component_version (3) or Query V$version View component-level information 1.1. Oracle

Oracle tablespace Creation Parameter descriptionHttp://blog.csdn.net/tianlesoftware/archive/2011/01/27/6166928.aspxWhen we add a data file to a tablespace, there is a reuse property. 10g's official website describes this parameter as

Most of the indexes we use today are generallyB*treeindex that stores key values and key values in the index structure.RowID,and is one by one corresponds. A bitmap index is primarily created for columns of the same value(Example: category, operator,

there is a need to do this in your job: compare the table structure of two tables to see if they are the same, and find out the difference. Compare the data in two tables and find out the difference data?Analysis: Due to the more fields in the table

Note: This article refers to other people's articles, linked to: http://blog.csdn.net/apicescn/article/details/1510922, I recorded just for the convenience of viewingOriginal: Connect by Select ... from tablename start by Cond1 Connect by Cond2

Simple use of EMHow to create a user, create a table:Tools: EM Enterprise Management dbconsole graphical management interfaceServer configuration.To use the graphical interface first ensure that the server configuration is OK: start in sequence

Oracle diagnostic tool-RDA RDA is short for Remote Diagnostic Agent. It is a tool used by oracle to collect and analyze databases. Running this tool does not change any system parameters. RDA collects comprehensive data, it can simplify our daily

Trigger 6 (system trigger) (Learning notes), system trigger learning notesSystem triggers System triggers are used to monitor the acquisition of information such as opening, closing, and error of database services, or to monitor user behavior and