Database Administrator

YII database query, YII Database $ UserModel = User: Model (); $ userModel-> count ($ condition, $ params); $ userModel-> countByAttributes ($ attributes, $ condition); $ userModel-> countByAttributes ($ attributes, $ condition, $ params); $

Principles and Examples of distributed transactions Abstract: in software development and database operations, it is often necessary to advance and retreat together, either to succeed together or to fail together. Case study:A Transfers 3000 RMB to

Crosstab is not used to implement the row-to-column application of PostgreSQL. crosstabpostgresql Table Structure and Data Select logdatetime, sum (login) as login, sum (logo) as logoFrom ( SELECT date (logdatetime) AS "logdatetime", case

Rac_grid self-check prompts that the cvuqdisk package is missing, and rac_gridcvuqdisk Original Works are from the blog of "Deep Blue blog". You are welcome to reprint them. Please note the following source when reprinting them. Otherwise, you will

Oracle set operation functions: Union, Union All, Intersect, Minus, intersectminusUnion: Perform Union operations on two result sets, excluding duplicate rows, and sort the default rules at the same time;Union All: Perform Union operations on the

BIEE11G Rpd merge and biee11grpd merge Rpd merge To merge two rpd files, you need to use three rpd files. One is blank. rpd: This is a blank rpd, which acts as the "original primary Archive" When biee is merged; the other is modified.

Steps for building a mysql master-slave ClusterPrerequisites: Four mysql databases need to be installed on linux, and the corresponding information must be configured. Mysql 01: master mysql 02: slave database slave01 mysql 03: slave database slave02

Shutdown abort mode: The redo is lost. Use the implicit parameter to start the database, abortredoShutdown abort ModeLoss of redo logUnable to open databaseThrough the alarm error ORA-00354: upt redo log block header from this error can be seen that

[MongoDB] building a Mongo database replica set (similar to a cluster) on the windows platform (II), mongodbmongo In the previous blog, we mainly explained how to build a mongodb replica set on the windows platform. Detailed blog address: Due to

Use bbed to modify data and bbed to modify data Bbed is a powerful tool that allows us to directly modify the corresponding content from the data file without bypassing oracle. ZBDBA@orcl11g>select * from emp; EMPNO ENAME JOB

Meaning of CONNECT role in Oracle db, oracleroleFrom: Complete Checklist for Manual Upgrades to 11gR2 (Document ID 837570.1) This article contains the following text: From Oracle 10.2, 'connection' role only supports des 'create session'

/Var/tmp/. oracle and oracle listener (listener)   Test the functions of/var/tmp/. oracle ~ --- View/var/tmp Permissions [Root @ lixora var] # llTotal 164...Drwxrwxrwt3 root 4096 Oct 31 tmp   [Root @ lixora. oracle] # llTotal 0Srwxrwxrwx 1 oracle10g

An error ora-28056, oracleora-28056 reported when an oracle instance is started under windows In oracle in windows, when an instance is started, it will write startup information to the event viewer of the windows operating system-Application Part,

Whether the maximum number of connections is set in oracle or an error is returned. There are 1100 data records to be updated, and an error is reported during connection. ORA-12518, TNS: listener cocould not hand off client connection According to

Servlet execute update error ORA-12518, servletora-12518 ORA-12518: TNS: listener cocould not hand off client connection This error is generally tested for database concurrency by multiple users, The backend executes an update using the servlet

Mysql permission level, mysql permission levelMysql has five levels of permissions:Clobal Level, Database Level, Table level, Column Level, and Routine Level. 1. Clobal Level: Global permissions for the entire mysql database server. Permission on a

Mysql programming considerations and common string processing functions, mysql Functions1) an SQL error is reported when a stored procedure is created (have an error in your SQL syntax ;....)Before you create a PROCEDURE or another type process, add

Oracle dynamic SQL statement and oraclesql statement Dynamic SQL return cursor: Create or replace procedure partition (p_regioncode in number, p_pscode in number, p_outputcode in number, p_pollutantType in number, Region in varchar2, p_attencode in

How to quickly recompile all stored procedures and compile stored procedures The general idea is to obtain all the stored procedures from sys. Objects, and then combine dynamic strings to use sp_recompile to re-compile all the SP. SELECT ROW_NUMBER(

EXtremeDB 6.0 was officially released: improved scalability and distributed query speed, extremedb6.0 Federal Road, Washington State, September-McObject®As an innovative database system software developer, the company announced its eXtremeDB®The