Oracle

What is consistent reading?Consistent reading refers to a change in the middle that is ignored from the moment of query.Examples ShowFor example, I have two accounts, a, B. A has 1000 pieces and B has 1000 fast. When I query the query speed is

--count the number of objects under a user--including tables, views, synonyms, functions, stored procedures, packages, triggers, indexes, constraints, sequences.SELECT(SELECTCOUNT(*) from User_tables) As TABLES, (SELECT COUNT (*) fromUser_views)

Host IP Address: 10.1.1.x Gateway: 10.1.1.1Virtual Machine node IP address (created on local workstation): 10.1.1.101~253 Gateway: 10.1.1.1Teacher Machine (VNC): 10.1.1.250Teaching Production library ip:10.1.3.3 do not use this virtual device.Shared

About Oracle:1, Oracle database software-Install the OS on the2, the acquisition path of software, business sales strategy.3. Database version: 9i--10%10g--65%11g--25%--new systems are common12c--Latest Version8i--internet9i10g--gird

Installing the Rlwrap-0.37.tar.gz tool--Realizing sqlplus memory and page up and down functionsIn the path of RPM10G321. Decompression[Email protected] ~]# CD/U01/RPM10G32[Email protected] rpm10g32]# TAR-ZXVF rlwrap-0.37.tar.gz2. Installation[[Email

Phased shutdown of 3.oracle databases3.1 Placing the database from the open state into the Mount stateSql> ALTER DATABASE close;Database altered.Close all data files and log files3.2 Unloading the database, placing the Nomount state from the Mount

How the 5.oracle database is closed.Case 1: Shut down the database in normal modeCommand: Shutdown normal direct shutdownThis method is seldom used or basic, if used, perhaps the database will never be closed;When a new user is allowed to log on

Iii. Introduction to data dictionaries and dynamic performance views1. Data Dictionary of the database(1) Dba_ data dictionary for all objects of a whole libraryOnly system users have permission queries(2) All_ object created by current user + other

Oracle has to start two services:1.oracleserver***. (' * ' means that the database name is also known as an "instance" and a service represents a database)2.oracleoradb11g_home1tnslistener. (only start this to connect to the database via JDBC)Oracle

Project, use a sequence as a single number, the framework is used by SSH, when the DAO layer to fetch, run times wrong to dual is not mapped,[select *.nextval nextvalue from dual]Later, the inspection found that the way to get the wrong, so change

Scheduled execution of stored procedures in peacetime development often used, years ago when they did a, because the time relationship has not been able to record, is now recorded.First, a complete example is used to implement the stored procedure

In the default, the Oracle database under Linux will not boot, but many times we need to boot the database, so we need to set up the following methods:System Environment: CentOS 6.5Oracle Version: 10.21. Modify the/etc/oratab file #

The merge is used to select some data from one table to update or INSERT into another table. The way in which you end up with an update or an insert depends on the condition in the statement. Here's a quick example: SQL> Create TableMerge_test1 (A

Oracle Advanced query over (partitionby ..) To facilitate learning and testing, all examples are created under Scott, an Oracle user. create table EMP(  empno    NUMBER(4) not null,  ename    VARCHAR2(10),  job      VARCHAR2(9),  mgr      NUMBER(4), 

Oracle11g installation and configuration EM You cannot log on to EM. If you execute emca-config dbcontrol db, you do not know that the default port number is 1522. But google will execute the command in step 2... (My listeners are fine) 1. Open

Official Oracle and oracle website We have encountered such a requirement: to input a String for the method, such as "User ID0, user ID1, user ID2... ", then return a result set based on these IDs as a data table for query by others.SELECT * from

Oracle startup and ShutdownOracle004 oracle-related program startup and shutdown: Disable: EM, ISQLPLUS --> listener --> database isqlplusctl stop, emctl stop dbconsole --> lsnrctl stop --> there are two ways: 1. dbstop 2. sqlplus as/sysdb -->

Oracle12cR1Relink error: ld. so.1: skgxpinfo: fatal: libons. so: openfailed: Nosuchfileordirectory Source:Oracle 12cR1 Relink Error: "ld. so.1: skgxpinfo: fatal: libons. so: open failed: No such file or directory" (Document ID 1957810.1)

ORACLE11G manual database creation  Step 1: Directory -- Database file directory $ Cd $ ORACLE_BASE/oradata $ Ls -- View the SID of an existing database PROD $ Pwd -- Check the absolute path. /U01/app/oracle/oradata $ Mkdir HYL $ Ls-l -- Production:

ORACLE10G manual database creation  Step 1: Directory -- Database file directory $ Cd $ ORACLE_BASE/oradata $ Ls -- View the SID of an existing database PROD $ Pwd -- Check the absolute path. /U01/app/oracle/oradata $ Mkdir HYL $ Ls-l -- Production: