Database Administrator

The tablespace numbers and data file numbers in Oracle are continuous and do not stop.. If the tablespace in ts $ has a break number, Oracle checks the data dictionary and control file at startup. When inconsistency is found, the database cannot be

Features of automatic PL/SQL running in Oracle: Run the automatic scheduling task in the UNIXDE corn Utility You can use the DBMS_JOB package in PL/SQL in ORACLE to schedule PL/SQL statement blocks so that they can run automatically at the specified

0. differences when querying groups When using Group By grouping in Oracle databases, the columns after select must be group Columns (Group by (columns) or lie with Aggregate functions. However, MySQL does not need to be grouped as needed. Mysql>

In MySQL, a table is created manually by using commands. When a Chinese record is added to the page, an incorrect string value similar to the following is thrown: '\ xBB \ xF0 \ xD0 \ xC7' for column 1 row.... The reason is that the string encoding

1. download the software from the GoldenGate website https://edelivery.oracle.com/ Oracle GoldenGate V11.1.1.0.0 for Oracle 11g 64bit for AIX5.36.1.zip 2. Upload the downloaded software to the corresponding directory. # Cd/u01/app/oracle # Ls Oracle_

Installing Oracle in Linux is really troublesome. First, you need to download a database. Because Testing's Debian is used, and most of the packages used for installation are old stable, which is generally not found in the port and must be searched

There are two methods 1. The installation port is 3306 mysql Tar-zxvf mysql-5.1.44.tar.gz Cd mysql-5.1.44 Create a mysql user group Groupadd mysql Create a user named mysql3306 Useradd-g mysql mysql3306 Compile and install . /Configure -- prefix

1. Install the Red Hat 5 system on the Virtual MachineVirtual Machine version: vmware workstation 7.11 build-282343Red Hat 5 version: [Red Hat Linux.5.5.for. x86. Server Edition]. rhel-server-5.5-i386-dvd(1) file → new → viutual machine on the

First of all, you need to understand the requirements for installing Oracle: Red Hat Enterprise Linux AS/ES 3.0 (Update 4 or later) red Hat Linux 4.0 SUSE Linux Enterprise Server 9.0 with SP 2 or laterAsianux 1.0 kernel requirements: The system must

The day before yesterday, according to the experiment steps described in RAC and STREAM in oracle rac, a similar experiment environment was set up on HP rx8640, and the experiment failed. Yesterday, I found an article "Learn oracle stream step by

1. Download MySQL installation-free/binary software (No compilation required) File Format: MYSQL-VERSION-OS.tar.gz 2. Create a MySQL group, create a MySQL user, and add the user to the mysql group. (In Unix of different versions, groupadd and

Background description In the process of developing Oracle forms, Uniqueness verification and repetitive verification are one of the most basic form verification functions. Generally, the uniqueness verification can meet the requirements of daily

27.1 Problem Description During EBS form development, although the folder function provides the sorting function, you can specify the sorting of the first three columns for data blocks in multiple rows, you can also click the titles of the first

1. When installing cluster in Oracle 10g, the following error is prompted during the period from 61%: WARNING: Error while copying directory/home/oracle/app/oracle/10R2/crs with exclude file list 'null' to nodes 'rac2 '.[PRKC-1002: All the submitted

Generally, the master/slave Mechanism Based on LAN can meet the requirements of 'realtime' backup. If the latency is high, first confirm the following factors: 1. network latency2. master Load3. slave LoadThe general practice is to use multiple

Because the data structure design of some modules of the project is not strictly in accordance with certain specifications, the data structure can only be queried from the database. The information to be queried is as follows: field name, data type,

What is a table?? Table: tableLogically, each table contains rows and columns in the database. The table can be 0 rows, but at least one table must support index query. Physically, each table is saved on a disk by one or more files. Each table is

1. MySQL JDBC driver package: http://dev.mysql.com/downloads/connector/j/ Version: mysql-connector-java-5.1.17.zip 2. Download any directory decompress

Starting to test Oracle 11g rac, the current performance is limited, so a single node rac is installed. The procedure is as follows: Modify ifcfg-bond * ifcfg-eth * in/etc/modprobe. conf and/etc/sysconfig/network-scripts by binding the NIC * I will

First create a directory SQL> showUser USERIs"SYS" SQL>Create Or ReplaceDirectory bdumpAs '/U01/app/Oracle/admin/orcl/bdump'; The directory has been created. Create an External table SQL>Create TableAlert_log (text varchar2 (400 )) 2