Oracle

Sometimes a picture or file must be stored in a database because of a need, such as security. Of course, in general, especially when the file is relatively large many people do not advocate the file in the form of binary stored in the database, the

Oracle JDeveloper is a tool for developing the ADF, which is mainly about how the tool is packaged, First of all, after our project has been built, there will be a structure like this Then right click on the resources folder to create a war file

Session level query: SELECT * from v$session_wait where Wait_class <> ' Idle '; --> SID SELECT * from V$session; --> sql_id/prev_sql_id SELECT * FROM V$sql--> sql_text SELECT * from V$session_event; --> specific SID has those wait affairs

Manually creating a database on a Linux platform (Oracle 10g), after installing Oracle software, you can exercise your ability to create a database manually and understand the entire process of database creation, as follows: 1. Create an Oracle SID,

Oracle Parallelism (degree of parallelism) The number of slave processes that are used in parallel in the operation is the degree of parallelism dop,index&table both have DOP as default operation parallelism 1 means no parallel processing is used

Always try to install Oracle 10 on openSUSE, Hey, level problem. Back to the RHEL5, very good, write down the installation steps: Some refer to others. Download Oracle10, extract to any folder, before installing the system to have some empty

' Open the Database Public Sub openoradb () On Error GoTo Toexit Oradb_open = False Set oradb = New ADODB. Connection Oraconstr = "PROVIDER=ORAOLEDB.ORACLE.1; Password= "& Strorapwd &"; User id= "& Strorauser &";D ata source= "& Oradbnetname &";

View the use of table space Select Upper (f.tablespace_name) "tablespace name" d.tot_grootte_mb "table space size (M)", D.tot_grootte_mb-f.total_ BYTES "used Space (M)", To_char (Round

Let's take a look at this piece of code:While s in (SELECT * from table1) loopINSERT INTO table1 values (S.FIELD1,S.FIELD2,S.FIELD3,S.FIELD4,S.FIELD5);End Loop;If the developer of SQL Server sees this code, he will definitely shake his head: This

/* TriggersTriggers are stored procedures that are stored in a database and implicitly executed. That is, the code block that Oracle automatically executes when a particular event occurs.Triggers are made up of three parts, triggering events,

1. If you do not remember the password of the SYS user, use the following method to modify the password:(1) Open cmd, enter Sqlplus/nolog, carriage return.(2) input "Conn/as sysdba";(3) Enter "ALTER user SYS identified by new password;" (The new

This type of error in Oracle is described in detail in the Oralce documentation, but the reasons and measures are not detailed, and this article focuses on how to resolve such errors. 1 ORA-12571, ORA-03113, ORA-03114, ORA-01041 Features: Client

XML version= "1.0" encoding= "UTF-8"?>DOCTYPE Mapper Public "-//mybatis.org//dtd mapper 3.0//en" "Http://mybatis.org/dtd/mybatis-3-mapper.dtd ">Mappernamespace= "Com.oracle.mapper.AccountInfoMapper">the full class name of the interface - Type:

/* with SYS SYSDBA *//* divided into four steps *//* Step 1th: Create a temporary tablespace */Create temporary tablespace xxxxxxx_tempTempfile ' D:\app\Administrator\oradata\orcl\xxxxxxx_temp.dbf 'Size 50mAutoextend onNext 50m maxsize 20480mExtent

1. Expressions that contain null values are emptyExample: Select A,b,a*12,a*12+b from Test if A is null, then a*12 and a*12+b are null, and if B is null, A*12+B is also null.NVL and Nvl2 filter empty function, NVL (A, A, a) to determine whether a is

First, the files Win32_11gr2_database_1of2.zip and Win32_11gr2_database_2of2.zip decompression.Note: These two files are extracted to the same directory, i.e.: The Components catalog is merged togetherTwo, double click "setup.exe", pop up the

Handled a small case yesterday, and later found that I do not know which dear friend modified the/etc/hosts file, causing the database to get down and record[[email protected] ~]# su-oracle$ $ps-ef|grep ora _oracle 5874 5847 0 11:35 pts/3 00:00:00

1, Oracle Support Delete Tablename,mysql must write delete from tablename.2. mysql has enum type, Oracle does not.3. Oracle Connection field Using | |, MySQL uses the function concat ().Select Ename | | ', ' | | Empno from EMP; MySQL can also be

With AS syntax– For an aliasWith TMP as (SELECT * from Tb_name)– For multiple aliasesWithTMP as (SELECT * from Tb_name),TMP2 as (SELECT * from Tb_name2),Tmp3 as (SELECT * from Tb_name3),... 123456789 --相当于建了个e临时表withe as(select *

Recently in doing NBU Oracle Backup Recovery test, perform recovery times error ora-27211:failed to load Media Management Library, the specific process is as follows:First, error messageExecute command:' nb_ora_client=192.168.x.x ' 'nb_ora_serv=nbu5