Database Administrator

Create a shell script instance in Oracle Code for creating a shell script instance in Oracle: #! /Bin/bash# Ocpyang@126.com# Create user If [$ #-ne 4]; thenEcho-e "\ e [1; 32 m ************************************** **********************************

BitMap indexes are more efficient than B-Tree indexes. 1. Experiment description: Operating System: rhel 5.4x86 Database: Oracle 11g R2 Ii. Procedure: Create a t_btree table and create a B-Tree index. The index key is status: SQL> create table

SQL and SQL tutorials The SQL statement is as follows: Update mapping_nj_roadsSet municipality = '000000'From mapping_geodata_boundaryWhere a. supportfile_code = '20140901' and(A. boundary. STContains (mapping_nj_roads.geom) = 1 or a. boundary.

Oracle Database Review 2. Oracle Database ReviewSubquery and table connection1. query the names of the people who make the most moneySELECT ename, sal FROM empWHERE sal = (select max (sal) FROM emp );②. Query the employees whose salaries are above

Install 11g_rac configuration equivalence, 11g_rac Configuration Brief Introduction to oracle 11gssh equivalence configuration on linux   Configure the grid user trust relationship Perform the following operations on the login, rac1, and rac2: $

Earlier oracle client versions cause bad SQL and oraclebad Environment: The production system is a 10 k OLAP system for online users (11 gb rac dual-node). One day, user units found that scanning programs were slow. View monitoring,Node1, high IO

JPA 2.0 lock mechanism and jpa2.0 Lock Mechanism A lock is a technique used to process database transaction concurrency. When two or more database transactions concurrently access the same data, the lock ensures that only one transaction can modify

MySQL creates a Function and mysqlfunctionTarget How to Create a Function in a MySQL database) Syntax Create function func_name ([func_parameter]) // brackets are required. The parameter is optional. RETURNS type [characteristic...] routine_body

Object Oriented DatabasesLet's talk a few minutes ago. I am currently engaged in the promotion of object-oriented databases in China. If you are interested, contact me. If you have any questions, you can trust me by yourself or go to the

SQL Window Function Requirements: MSSQL is used to list the following information about all data volumes in a server instance: data upload ID, data upload name, creation date, data file type, data file size, total data size, and file

How can I view others' QQ records? QQ1622863529Query serviceConsult QQ: 1622863529 to query QQ chat records, chat content queries, QQ audio queries, video content queries, delete QQ chat records, modify QQ chat records, and delete chat records with

Oracle split, oracleCREATE OR REPLACE TYPETYPE_SPLITAs Table Of Varchar2(200 );Create or replace function f_split (p_list varchar2,P_sepVarchar2: = ',')ReturnTYPE_SPLITPipelined IsRochelle idxPls_integer; V_listVarchar2(200): =

Oracle 11gR2 cannot export empty tables with exp solution, 11gr2exp Oracle 11gR2 cannot export empty tables with exp Solution There is a new feature in 11gR2. When the table has no data, no segment is allocated to save space. Oracle cannot export

How does Mysql delete a temporary table starting with "# SQL, Author: skateTime: 2014/09/28   How does Mysql delete a temporary table starting with "# SQL -"?   Phenomenon: after re-indexing, the disk space of the Mysql server is almost full. Run

Oracle error -- ORA-03113: file end solution for communication channel, oracleora-03113  Origin   Today as usual, login PL/SQL, indeed login failed, there is an error "ORA-01034" and "ORA-27101" Then I log on to Oracle through the command prompt,

Db4o officially stops supporting and object-oriented databases. I tried db4o some time ago. I really felt good, But I searched for it in China and did not find any special forum or object-oriented database products, I am deeply aware that this is

Create a table synchronization trigger for each site for data synchronization and a data synchronization trigger As mentioned in the previous blog, when data synchronization is performed, you need to create a trigger for each operation table on each

SQL Injection problems that may be caused by batch in queries When we use in or for query at some time, in order to speed up, we may often use the concatenation between SQL statements and then directly import them into an in statement, in fact, the

UML: four types of relationships and four types of uml Before drawing a class chart, we must first clarify the Four Relationships in UML. There are four common relationships: Generalization, implementation, and Association ), dependency, which

Manually compile the. fmb file. pll file, and manually compile the. fmb. pll file.Compile compile manually compile the fmb file:Frmcmp userid = user/pwd @ db module = xxx. fmb batch = no module_type = form compile_all = yesCompile the mmb