Database Administrator

MySQL Slow Query Log) Like most relational databases, log files are an important part of MySQL databases. MySQL has several different log files, such as error log files, binary logs, common logs, and slow query logs. These logs help us locate the

Oracle 10g SQL paging query statement and Efficiency Analysis When using the Oracle database for paging query algorithm design, the paging query SQL statements can basically be applied according to the template given below: Paging Query

When I installed MySQL in Ubuntu today, I typed it in the command line. after the/configure -- prefix =/usr/local/MySQL Command is run, the system prompts No curses/termcap library found after the configuration is successful, so I couldn't continue

SQL generates n-bit random strings and SQL generates n -- 1. Use newid () go -- to create a view (because newid () cannot be directly used in the function) create view vnewid as select newid () N 'macoid '; go -- create function getrandstr (@ n int)

Oracle Apps Script to create a new User Login Account: -- CREATE a new user account DECLARE P_user_name VARCHAR2 (200): ='Ptiany'; P_owner VARCHAR2 (200): =NULL; P_unencrypted_password VARCHAR2 (200): ='Welcome'; P_session_number NUMBER: =

Oracle Database officially states that it does not support Vmware and oraclevmware Oracle explicitly stated on its official Support website in September that it does not Support running Oracle databases on VMWare.What should we do in the current era

Add a column with a specified position to the MySQL table, and specify a position in the mysql table. ALTER TABLE test ADD COLUMN id INT UNSIGNED NOT NULL auto_increment PRIMARY KEY FIRST Adding columns to a table is a common operation. When adding

How to create a new database instance for Oracle 10g XE?For Windows, first ensure that there is no important data in the current XE instance. Then, call oradim-delete-sid xe to delete the current system service (Windows Service ).Run XE. bat in D: \

Analysis on the solution of creating and last updating timestamp fields in MySQL, mysql FieldBefore writing this article, clarify my MySQL version. mysql> SELECT VERSION();+------------+| VERSION() |+------------+| 5.5.29-log |+------------+1 row

Oracle EBS is relatively large and has many modules. The abbreviations and full names of some modules are listed here. ABM-Activity Based ManagementAD-Applications DBAAHL-Oracle Advanced Service OnlineAK-Oracle Common Modules-AKALR-Oracle

SQL Server trigger and SQL Server trigger Brief Introduction: A trigger is a special stored procedure, which is automatically executed only when a specific event occurs. Stored Procedures and triggers are a collection of SQL statements and flow

How to use STA (SQL tuning advisor), tuningadvisor1. manually generate SQL tuning advisor1. SQL text format:DECLAREMy_task_name VARCHAR2 (30 );My_sqltext CLOB;BEGINMy_sqltext: = 'select * FROM DBA_SEGMENTS where owner = ''clic' AND SEGMENT_TYPE =

Introduction Database coffer (DBCoffer) is an Oracle data security enhancement product based on the Oracle extension mechanism, featuring high data security, completely transparent applications, and efficient ciphertext access. DBCoffer can prevent

Principles of database sharding and implementation method based on thinkPHP, database sharding thinkphp Why table sharding? database sharding: When the data volume and access volume of our data tables are large or frequently used, a data table

The concept of SCAN (Single Client Access Name) is introduced in the Oracle 11g RAC cluster, that is, the Single Client Access Name of the cluster. SCAN provides a single host name for the client to access the Oracle database running in the cluster.

In general, Oracle 11g R2 RAC provides the following features: High Availability: shared-everything mode ensures that services are not stopped when a single node fails, and other nodes in the cluster will take over quickly Scalability: multiple

 1. Grant scott user connection permissions: Grant connect to scott; 2. Create a java project in Myeclipse to import the jdbc package (classes12.jar ): Right-click the project bulid path-> add external archives and select classes12.jar. 3. Create a

1. installation environment: Red Hat Enterprise Linux 5.4, memory is not less than 1 GB, hard disk is greater than 8 GB, Linux address 192.168.1.80 in this environment. Oracle version: 10 GB Installation steps: 2. Modify the hosts

% T: Number of the redo thread. % S: log serial number. The ID value of % rRESETLOGS. These three matching characters must exist. If the online configuration file format is used, you must restart the database. 10.1 view the location where archive

Background:The physical memory of the master and slave machines is doubled. After the memory is expanded, You need to modify the memory parameters related to the database, including the database and operating system. After doubling the memory size