Database Administrator

Oracle 10g installation error record 1 in linux 5: INFO: mv-f/oracle/app/product/10.2.0/db_1/bin/ctxlc/oracle/app/product/10.2.0/db_1/bin/ctxlcO INFO: mv ctxlc/oracle/app/product/10.2.0/db_1/bin/ctxlc INFO: chmod

Authoritative Performance Testing Organization (TPC) was confirmed on December 3, the previous day Oracle submitted the names of the T3-4 Supercluster, with a total of 30 249 transactions per minute (transactions processed per minute. The original

An error occurred while installing the Oracle database: INFO:/usr/lib/: No such file or directory It indicates that the dynamic link library is missing. This dynamic link library is composed of libstdc ++ The dynamic link library provided in

Sys_context 1. terminal: The identifier of the terminal corresponding to the current session customer 2. language: language 3. db_name: Current Database Name 4. nls_date_format: Date Format corresponding to the current session customer 5.

When installing Oracle on Linux, the following errors are often reported: You cannot use the command/usr/X11R6/bin/xdpyinfo to automatically check the display color. Check whether the DISPLAY variable is set. You can use the following command to

MySQL is successfully installed at the beginning, but it is the most original startup method. /Usr/local/mysql/bin/mysqld_safe -- user = mysql & Today, I suddenly remembered that I could start using service and init. d, so I searched for it, but it

How to restart the MySQL Service RedHat Linux (Fedora Core/Cent OS) 1. start:/etc/init. d/mysqld start2. stop:/etc/init. d/mysqld stop3. restart:/etc/init. d/mysqld restartDebian/Ubuntu Linux1. start:/etc/init. d/mysql start2. stop:/etc/init.

First, let's clarify several concepts: In Oracle, there are two constraints: deferred and immediate:Deferred: If Oracle checks the constraints only when committing a transaction (commit), this constraint is called deferred ). If the data violates

The following describes how to organize scripts on the Internet and make improvements based on actual conditions. #! /Bin/sh Usage = "$0-hlocalhost-uroot-pxxxx-P3306"Dbhost = "localhost"Dbuser = ""Dbpass = ""Dbport = 3306 For varin in $ *; doIf [$

Create the following table in PostgreSQL and insert the following data: Create table "TTT "( ID varchar (32) primary key not null, NAME varchar (128) NOT NULL ); Create unique index TTT_NAME_IDX ON "TTT" (NAME ); Insert into "TTT" values ('1', 'A ');

Ora-01450 is an error that may occur during index maintenance. First, let's take a look at the relevant information of 01450 through oerr: SQL> ho oerr ora 0145001450,000 00, "maximum key length (% s) exceeded"// * Cause:// * Action: Haha, Oracle

Solve the libpthread. so.0 problem in Oracle 10gRAC InstallationI. Problem The CRS of 10.2.0.1 encounters the same problem in the following situations on linux5:1. rootOracle CRS stack installed and running under init (1 M)Running vipca (silent) for

Group by function of Oracle The test process is as follows :--- Rollup: Details and summary of employees' salaries in each department for reference.Select t. dept_id, t. dept_name, sum (t. salary)From qcfang. test1 tGroup by rollup (t. dept_id, t.

Oracle PLSQL Packaging -- Package-- Create a package-- Step:-- 1. Statement (create a Baotou)-- 2. Create a Data Object (create a package) -- 1,Create or replace package myPackAsV_bookCount integer;Procedure p_back(V_stuid borrow. stuid % type,

A. Check the standby statusSQL> select name, database_role, OPEN_MODE, SWITCHOVER_STATUS from v $ database;NAME DATABASE_ROLE OPEN_MODE SWITCHOVER_STATUS-------------------------------------------------------ORCLDB PHYSICAL STANDBY MOUNTED NOT

Data Guard Services   The following three parts constitute Data Guard's log Data transmission, log Data application, and change the database role: A), log transmission Services (Redo Transport Services) B) log application service C) role conversion 1

Because the identifier of the business table is not added during data conversion, multiple processes must perform operations on the same table to improve the update efficiency. 1. Write the corresponding stored procedure: Create or replace procedure

1. Download the Installation File Use the installation package 10201_database_linux32.zip and log on as the root user. 2. Check whether the system resources and environment meet the installation conditions. Grep MemTotal/proc/meminfo: the memory

MySQL Binary Log, also known as bin-log, is a Binary Log file generated by mysql execution changes. It has two main functions:* Data Recovery* Master/Slave databases. It is used to add, delete, modify, and maintain synchronization with the master

1. Recently, one rgion of hbase often fails. the following error occurs when you view the node log: 2014-02-22 01:52:02, 194 ERROR org. apache. Hadoop. hbase. regionserver. HRegionServer: Close and delete failed Org. apache. hadoop. hdfs. server.