Database Administrator

If this error occurs, the master database loses archive, and the slave database cannot synchronize logs. Media RecoveryWaiting for thread 1 sequence 70 Fetching gapsequence in thread 1, gap sequence 70-72 Completed: ALTERDATABASE RECOVER MANAGED

Functions and stored proceduresIn Oracle databases, you can use a single statement to add, delete, modify, and query a database. In addition, you can use multiple statements to form an I statement block and execute them together.These statement

In the Oracle 10g world, partition tables are divided into five types: range, hash, list, range-hash, and range-list. In oracle 11g, it has evolved to the 3*3 partition combination type to meet more application scenarios! However, no matter under

Start Redis ServiceSrc/redis-server or src/redis-server redis. conf Src/redis-server redis. conf 1> log. log 2> errlog. log 1 is the standard output, 2 is the error outputUse Redis as a Linux service for random startup Vi/etc/rc. local, add the Code:

1. Execute database creation commands[Oracle@www.bkjia.com database] $ dbca-silent-responseFile/home/oracle/database/dbca. rsp 2. The reported template does not exist. The error message is as follows:Template General Purpose does not exist. Please

-- Create a test tableCreate table fn_dml_test(Id number (20 ),Text VARCHAR2 (200)) -- Create a functionCreate or replace function fn_test (id number) RETURN NUMBERIS/*14551,000 00, "cannot perform a DML operation inside a query"// * Cause: DML

1. for the get method, hibernate checks whether the data corresponding to this id exists. First, it searches in the session cache and then in the second-level cache. If no data exists, it queries the database, if the database does not exist, null is

Authorization: Create UserTempUser identifiedBySa DefaultTablespace users  TemporaryTablespaceTempQuota unlimitedOnUsers; CreateProfile tempprofile LIMIT SESSIONS_PER_USER 3 CPU _ per_call 2000 IDLE_TIME 15 LOGICAL_READS_PER_CALL 200

This script is applicable to a single instance or RAC environment; Edit a file anywhere on the server and enter the following content: Run the script sh your_filename. Then, everything is OK, come baby let's go! #! /Bin/bash# File:

Use PL/SQL to delete a large table with millions of records: Recently, developers have conducted stress tests on the database in the test environment, which generates a large amount of dirty data. There are several large tables with millions or even

Master database:192.168.0.11 Alternative master database:192.168.0.12 Slave database:192.168.0.13 Monitoring machine:192.168.0.10 First, installMysql(Invigilator'sMysqlDo not install it first ). I usePercona server(OneMysql. It is said

My operating system: rhel6. The default value is base system. All available packages of development-tools selected by developmet. Install the ncurses-devel package. My system is not installed. Install yum from the CD or rpm. Oracle Releases Version 5

[Root @ www.bkjia.com ~] # Yum-y install mysql-server[Root @ www.bkjia.com ~] #/Etc/rc. d/init. d/mysqld startInitializing MySQL database: Installing MySQL system tables...OKFilling help tables...OK To start mysqld at boot time you have to

To query the total number of fields in a table in Oracle, use an SQL statement or Select count (column_name) from user_tab_columns whereTable_name='T_ B _AUDITOR' The number of fields in the specified table can be found. The following is a rough

PostgreSQL manages database access permissions through roles. we can regard a role as a database user or a group of database users. Roles can have database objects, such as tables and indexes, or grant permissions on these objects to other roles to

Toad for Oracle-Basic Edition It contains different features, from PL/SQL and SQL scripts, PL/SQL and SQL debugging suite to built-in knowledge basics: Knowledge Xpert for PL/SQL and Knowledge Xpert for Oracle Administration Stration. it allows you

The database supports native storage of binary data within BSON objects. however, BSON objects in MongoDB are limited in size (4 MB older versions, 16 MB in v1.7/1.8, higher limits in the future ). the GridFS spec provides a mechanisms for

Soaptest in Oracle DeclareSoap_request varchar2 (30000 );Soap_respond varchar2 (30000 );Http_req utl_http.req;Http_resp utl_http.resp;BEGINSoap_request: = ' f001 ';Http_req: = utl_http.begin_request ('HTTP: // 127.0.0.1:

Database Synchronization Process, the strictest indicator, the first is efficiency, that is, the number of SQL records synchronized per second; the second is consistency, that is, the data generated by the master database, whether the data is

Local Environment: 11.2.0.1 1. download fuse package on websiteHttp://fuse.sourceforge.net/ Download 2.7.4 Check the rpm package. Rpm-q kernel-devel Kernel-devel-2.6.18-308.el5 2. Install fuse Tar-xzvf fuse-2.7.4.tar.gz ./ConfigureMakeMake