Oracle

Large page Memory NotesNote 1:cannot use Oracle Automatic memory management; NOTE 2:The goal is to reduce the use of swap; Note 3:recommended SGA greater than 8G; Note 4:limited to Linux systems only; Note 5:do not use/DEV/SHM

I. What is PL/SQL?PL/SQL (procedural language/sql) is an extension of Oracle in the standard SQL language.PL/SQL not only allows the embedding of the language, but also defines variables and constants, allows the use of conditional and circular

First, the conceptThe data dictionary is the most important part of the Oracle database, and it provides some system information about the database.The dynamic performance View records information about the startup of the routine.Second, the data

1. Error occurred while creating the instanceError message:Ora-27125:unable to create shared memory segmentProcessing method:[[email protected] ~]# ID Oracleuid=500 (Oracle) gid=500 (oinstall) groups=500 (Oinstall), 501 (DBA)[[email protected] ~]#

This article mainly describes which services are Oracle 11g must be opened and detailed introduction of these services, the need for friends can refer to the followingAfter successfully installing the Oracle 11g database, you will find that your

Oracle | | and (+) + substr function Usage Summary"Substr function Usage"SUBSTR (string, intercept start position, intercept length)//return intercepted wordsubstr (' Hello World ', 0, 1)//return result is ' H ' * start with a string of length 1

The 6th chapter of Administrator's Guide describes the memory management of Oracle instances, where Oracle uses automatic memory management (AMM) to manage the size of the SGA and PGA by default in 11g. In addition to the default methods, you can

In the MySQL database, you want to implement a self-increment function of the data (that is, when inserting this data, fill in null, System automatic + 1), you can use the statement auto-increment directly in the column.int Primary Key

Processing process:1, the View user's proifle is that, generally is the default:Sql>select username,profile from Dba_users;2. View the password expiration settings for the specified profile (such as default):Sql>select * from Dba_profiles s WHERE

The difference between--sql server and Oracle:--dbms Database Management System--1. Data types are different.--sql Server data type: int, smallint, Char,varchar,nchar,nvarchar,ntext,datetime,smalldatetime,money,decima,--float,bit ...Data type

------------------------1. Simple SQL query--------------------------SELECT * from EMP;Select Empno,ename,job from EMP;Select ' number is: ' | | Empno | | ' Name is: ' | | Ename from EMP;Select distinct empno, ename from EMP;Select

When using the Oracle JDBC driver, are there some problems that you can solve by replacing different versions of the Oracle JDBC driver? There are multiple versions of the most commonly used ojdbc14.jar, and there are multiple versions of

When you sort the cross-report column header, you encounter these three questions, and here's a concrete example.The design of the database is shown in table structure 1:Figure 1To get out of the student_name_,s.grade_,s.subject_name_, these three

First, the database design paradigm and its significance and shortcomingsThe design paradigm of database is the specification that database design needs to meet, the normalization of database is the way to optimize the structure of table and how to

New Project Requirements:Combine Baidu map, specify a location in the map, get the location and information of the units stored in all databases around 1km in this location on the map. So I wrote a piece of Oracle's stored procedure, which was

Ideas:Record the current maximum serial number for the next fetch using a serial number table. Each time the number is taken, the serial number table is updated to large.Tables involved:Serial Number Table Hp_no:

ORA-12537 is mainly oralce monitoring problems, today to help colleagues deal with problems, he asked a situation, began to connect very normal, the subsequent occurrence of ORA-12537 problemsSimply tidy up the nextGeneral conditions of use1-Check

Before the project time to download an open source program, the database in the migration through the Exp/imp import and export, the results of the program in the start times wrong, after comparison found two database table more than 10, and then

1. Development environment Installation Oracle Odp.net : http://www.oracle.com/technetwork/topics/dotnet/utilsoft-086879.html???? Download 32-bit Oracle Data Access Components (ODAC) with Oracle Developer Tools for Visual Studio???? Of course you

http://blog.csdn.net/iihero/article/details/8254107http://www.programgo.com/article/81693457907/Given the question of DBCP directly for the JDBC connection, I made one of the simplest examples. All resources come from the Internet. It doesn't need a