Oracle

1 Right-click on "Computer"--services and services and applications--Stop all Oracle-related services ( Oracle-like ORACLEDBCONSOLEORCL). 2--All Programs--oracle--> Oracle Installation Products--Universal Installer, "Welcome" after you start,

Select Case whenR= 1 Then(SelectS.comments fromUser_tab_comments swheretable_name=Aa.table_name)Else "' End astable_comments, Case whenR= 1 ThenAa.table_nameElse "' End astable_name, AA.R ascolumn_sequence, aa. COLUMN_NAME, AA. Data_type, Aa.

In a paged query, you need to use pseudo-column rownum, the code is as follows:SELECT * FROM (select RowNum RN, name from cost where rownum 3;But the first time with RowNum, the second use RN, position can not change, otherwise error, the first time

1. Create a temporary table spaceCreate Temporary tablespace appstemptsp ' /oracle/app/oracle/oradata/orcl/appstemp01.dbf ' onnext 32m maxsize 2048mextent management local;2. Create a table

1. Differences between temporal and tablespace spacesTablespace: This space is used for data storage (tables, function, stored procedures, etc.), so is the actual physical storage area.Temporal tablespace: The primary purpose is to sort operations

The database was queried and modified by Hibernate + MySQL, because MySQL database is simpler than Oracle database, recently read Oracle's book, this afternoon tried the next Hibernate framework to operate the Oracle database:1. Create a new WEB

DECLARE CURSOR city_cur isSelect t.new_customer_id,t.old_customer_id fromCITSONLINE.CRM_CUSTOMER_TMP6 Twhere t.new_customer_id!=t.old_customer_idOrder BY new_customer_id;BeginFor my_cur in City_cur loopUpdate Platform.crm_service_customer_bak SSet s.

This article summarizes Oracle's database management, with a focus on its physical storage section.Some SQL commands:Manually switch redo log file groups:Switch logfile;To add an online redo log file group:4 ('/oradata/log4a.log','/oradata/log4b.log'

This is the first of my Oracle Learning Notes series, which summarizes the architecture of Oracle, and to learn Oracle, it is important to understand how Oracle operates and how it works. The content of today's study is compiled with a diagram, memo,

After the DB server restarts, the following error is attached:The reason is that Listener.ora is reverted to the initial file after reboot and the SID is emptied.Steps to resolve:1. View monitoring service and database service:This is where you find

First_value and Last_value are functions used to parse the first and last values of the corresponding columns in the function window.The syntax is as follows:First_value (col[Ignore NULLS]) Over([PARTITION by Col] [ORDER by Sal] [Windows])

The profiles file is a configuration collection of password and resource restrictions, including CPU time, I/O usage, idle time, connection time, number of concurrent sessions, password policy, and so on resource usage profile can control session

Oracle View Add notesCopyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.Create or replace view Oes_material_series_ref asSelect T.productgroup, O.idnrk materialcode, T.seriescodeFrom

1, viewing the number of system configuration cursorsSelectValue fromV$parameterwhereName= 'open_cursors';2, viewing cursor usageSelectO.sid, Osuser, Machine,Count(*) num_curs fromv$open_cursor O, v$session swhere user_name = 'xftest'

1. Cmd in DOS2. re -Enter DBCA (database create)3, pop-up interface, direct next , Select Delete Database4, after successful deletion, go back to a first interface, select Create Database , next.5. Select: Custom Database (new), next6 . Enter the

Set before 11g: Sga_target11g version setup: Memory_target (auto-allocate SGA and PGA size)To view memory current memory size:Sql> Show Parameter SGASql>show parameter Memory_targetStatement:alter system set MEMORY_TARGET=4G Scope=spfile; Restart

I. Related content1. Understand the concepts and types of indexes.2. Master the command to create the index.3. Understand the concepts and advantages of the view.4. Understand the features that updatable views should have.5. Master commands for

To establish the tablespace and the user's steps: User Create:Create user username identified by "password"; Authorization:Grant create session to user name; Grant create table to user name; Grant create tablespace to user name;

1. Create an index:(1). Single-Column indexCreate index name_index on outpatient expense record (ID)(2). Composite IndexThe same table can have multiple indexes, but the combination of required columns must be different.-For example:Create index emp_

Oracle and Google have returned to court, a dispute that began in 2010, when Oracle first sued that "Google uses 37 Java APIs (application interfaces) in the Android operating system." The original verdict in the case was in favor of Google, but the