Oracle

Need to be aware of1. switch from root user to Su Oracle cannot start sqlplusThe root user switches to Su-oracle to start the SqlplusThe Sqlplus command can also be started by logging in directly from the Oracle user2. Start the error when starting

#启动多路径multipathd服务Service MULTIPATHD Restart#设置开机自动启动multipathd服务Chkconfig MULTIPATHD on#查看信息Multipath-llThe mounting method of storing the note size above 2TBPartedParted/dev/mapper/mpath0Mklabel GPTShow printMkpart Primary 0% 100%Show

Introduction of Oracle Driver error in Maven missing artifact com.oracle:ojdbc14:jar:10.2.0.4.0 time: September 22, 2015 views: 9,361 timesFind Ojdbc in MAVEN Central Library, find the latest version is 10.2.0.4.0, then introduce OJDBC in MAVEN

spl>SELECT * FROM empwhere datesBetweenTo_date (' 2007-06-12 10:00:00 ', ' yyyy-mm-dd hh24:mi:ss ')andTo_date (' 2007-06-12 10:00:00 ', ' yyyy-mm-dd hh24:mi:ss ')Oracle uses 0 as the default value when omitting input parameters corresponding to HH,

First, Oracle 11g login service opensAfter successfully installing Oracle 11g, a total of 7 servicesThe meanings of these seven services are:1. Oracle ORCL VSS Writer Service:Oracle Volume Mapping copy write service, VSS (Volume Shadow Copy service)

1. Start-> Settings-> Control Panel-> Management Tool-> Service stop all Oracle services. 2. Start-> Program->oracle-orahome81->oracle installation products-> Universal Installer Uninstall all Oracle products, but Universal Installer itself cannot

Most recently, the disk space on the test environment server was tight, and the data in the tablespace didn't know what needed to be developed, and because the test library ran a long time, at least three years ago. So you start by cleaning up logs

Scott users are a very important experiment in our process of learning Oracle, and when we build a database, the Scott user does not appear by default if we choose a custom mode, but we can make this user appear by using a few simple commands. The

1, create Java program: Receive parameters passed by stored procedure, send socket communication. Create or replace and Compilejava source named Jym

For the sake of convenience, the following simple models are established and some test data are constructed:In a business admissibility subsystem BSS,SQL Code-- Customer profile CREATE TABLE Customers (customer_id number (8null,- customer City_name

Official website: http://www.oracle.com/index.htmlSelect your "operating system" to downloadFor example:Environment: x64 Win2012 R2Oracle:win64_11gr2_databaseIllustration one: DecompressionDiagram Two: InstallationIllustration three: a command

Many excerpts from the articleHttp://blog.163.com/[email protected]/blog/static/7956964020131069843572/At the same time, based on this article, to supplement some of the learning points, if there are questions, hope to point out the discussion.1

PackageShujuku;Importjava.sql.Connection;ImportJava.sql.DriverManager;Importjava.sql.PreparedStatement;ImportJava.sql.ResultSet;Importjava.sql.SQLException; Public classBasedao {Connection conn=NULL; PreparedStatement PS; ResultSet RS=NULL; intrs1

function:1 Create or Replace functionFn_test (tablenameinch varchar2)return Number is2Sqlsvarchar2( -);3Rtn Number(Ten):=0;4 begin5 --get the number of record bars for student tables6 --Select COUNT (*) into RTN from student;7 8SQLS:='Select

--select Name,count (ID) from Work_test GROUP by name have count (ID) >1--select Upper (name), T.*,lower (name), substr (name,1,5) from Work_test t--Even table update/*update Work_test Set (Price) = (select T.price from Work_test t where t.price=80.0

Oracle cannot connect remotely for important reasons, even if the firewall is open 1521 port, but the return packet may be a random port, so it is still possible to be blocked by the firewall.Workaround:Add a String value in the registry as follows.

A table customers and B table tmp_cust_city have 3 identical fields, Customer_id,city_name,customer_type now to update a table according to the B tableUpdate a field condition:Update Customers ASet City_name= (select B.city_name from tmp_cust_city b

Oracle cannot set primary key self-increment as MySQL does, and Oracle uses to make one or more columns of a data table self-increasingSequence sequence+ Trigger trigger: Implements the self-increment of the primary key in the data table S_departPL/

In order to facilitate learning and testing, all of the examples are created under the Oracle's own user Scott.SELECT statements in Oracle can be used with the start with ... connect by prior ... clauses implement recursive queries, and connect by

In the early days of the National Day, Oracle 11 was installed on CentOS 6.5 to test colleagues, and what was used was normal. Before the festival I take a day off, call me that the system in the machine can not log in from the command line, enter