Database Administrator

How does Java IDE (Eclipse) connect to the mysql database? 1. Download mysql-connector-java from www.mysql.com ); 2. Add an external jar package in the Eclipse project, that is, the jar file in the mysql-connector-java decompression package, such

This tutorial is mainly written because I want to try django1.2 today and need a runtime environment of django. It also serves as a record to allow others to build the django environment smoothly. Before installation, make sure that the python

1ERROR:A ORA-01034: Oracle not availableORA-27123: unable to attach to shared memory segmentLinux Error: 13: Permission denied Input as root on the terminal: Cd $ ORACLE_HOME/bin Ll oracle (in fact, ll is not a command, but it is simply a shorthand

Mysqli. dll is an extension of PHP to mysql's new features. In PHP5, php. I after mysql is loaded in ini, which indicates improved, interface, ingenious, incompatible or incomplete (the extension is still under development, because neither MYSQL4.1

If the web and database are not on the same server, the MySQL server must allow remote connections to run the website properly. There are two ways to set the remote connection of MySQL: 1. Change the table. It may be that your account is not

The tnsping service name of the XP Oracle client is normal, but cannot be entered with SQLPLUS. The error message is: ORA-12514: TNS: The Listener currently cannot identify the request service in the connection Descriptor Check that the tnsnames.

System Environment:[Root @ nich4 cx_Oracle-py] # uname-Linux nich4 2.6.18-164. el5 #1 SMP Tue Aug 18 15:51:54 EDT 2009 i686 i686 i386 GNU/Linux Python version:[Root @ nich4 cx_Oracle-py] # python-VPython 2.4.3 Oracle version:Oracle database 10.2.0.5

Notes 1. find/-name uuid-ossp.so search to see if there is If not. Click here to download and install uid-1.6.1.tar.gz. Note .. /Configure. The uuid-ossp.so file will exist in/usr/local/lib at this time 2. If an error is reported during postgresql

1. Detect database events and waits SELECT event, total_waits, total_timeouts, time_waited, average_wait FROM v $ system_event 2. query session events and wait time Select sid, event, total_waits, average_wait From v $ session_event where sid = 10; 3

Oracle 10g environment variables for NLS have changed a bit: For RDBMS 7.2.x version the variable is called ORA_NLS.For version 7.3.x the variable is called ORA_NLS32. For Oracle 8, 8i and 9 variable is called ORA_NLS33. For Oracle 10g the

Install Ubuntu 10.10on Windows 7. download and run wubi.exe to install the software on any disk. Install Oracle in Ubuntu... Hard work! But it's okay! I found a lot of information and made a lot of detours. The summary is as follows: First,

1. The data pump can export tables, tablespaces, user schemas, and databases.Note: To export tablespaces and databases, you must have the DBA role or the EXP_FULL_DATABASE role.Grant connect, resource, exp_full_database, create any directory to sfcp;

Oracle Data Table CompressionCompression principle: store the repeated column values of all rows in the same Block in the header area. This region is called a symbol table ). If the value of a column in the row is equalThe value stored in the symbol

In Oracle, databases are composed of instances and physical storage structures. The physical storage structure refers to the physical files stored on disks, including data files, control files, and online redo logs), parameter files (spfile/pfile),

Sort indexes first, logically divided into Root, Branch, and leaf ). Leaf contains the value, length, and rowid of the index column. The stem block stores a pointer to a specific stem block. The root block is the same. This is a logical division. In

Problem description Assume that the actual situation may not be designed in this way, but if it happens ....Iron boss has a ticket table to store tickets from Beijing to Shanghai. Id Uid Start_addr End_addr Book_time 1

1. Bolb field description: Writing Blob fields is very different from writing other types of fields. Because Blob itself has a cursor, you must use cursor to operate blob. Therefore, before writing Blob, you must obtain the cursor to write data. How

Compile the Oracle driver in Windows Open the project:C: \ Qt \ 4.8.1 \ src \ plugins \ sqldrivers \ oci Modify oci. pro: TARGET = qsqloci SOURCES = main. cppInclude (.../../SQL/drivers/oci/qsql_oci.pri) Include (../qsqldriverbase. pri) INCLUDEPATH +

The role of Data Gurad is not much said. Here, we will talk about the building steps of physical standby.There are roughly three ways to create a standby DatabaseMethod 1: Use rman to generate standby. (use rman's duplice method for direct creation

I. Usage The package UTL_FIle is used to read and write files in the operating system, provided that the Directory object and authorization are created first. Then you can use the types, procedures, and functions provided in the UTL_FILE package to