Oracle

First to complain, according to this play to spend my big half a day, all the way to the pit!My computer is Win7 64-bit.The first stepOpen the php.ini and remove the semicolon from the front of the Extension=php_oci8_12c.dll

Examples of common methods for single-line functions are shown:--[1] character functions--Query the names of all employees in lowercase, uppercase, and uppercase letters--select ename from emp;--lower () lowercase upper () uppercase Initcap () first

[Email protected] # more hot_database_backup.sh#!/bin/sh# $Header: Hot_database_backup.sh,v 1.3 2010/08/04 17:56:02 $##bcpyrght#*********************************************************************#* $VRTScprght: Copyright Symantec Corporation, All

First I say what is Oracle's function, once a Daniel, let me talk about the familiar Oracle function, I was confused, thought "What Oracle function Ah, is not those SQL statements," then I actually uttered a select answer, he almost angry,

When using a self-increment sequence, when a trigger is needed, I always report a compile pass, but there is a warning or an error when I create multiple triggers consecutively.---1. Application Information drop TABLE app_info Cascade

one, from Oracle to XML1. start Sqlplus execution >(1) get all fields of the exported table: in the substitution statement, Table_name,owner is the name of the table to be exported and the user name of the table, which is executed in Sqlplus after

SQL Server default port number is: 1433URL: "Jdbc:microsoft:sqlserver://localhost:1433;databasename=dbname"DriverName: "Com.microsoft.jdbc.sqlserver.SQLServerDriver";MySQL default port number is:

@echo offEcho ================================================Automated backup scripts for Oracle databases in the Echo Windows environmentEcho 1. Use the current date to name the backup file.Echo 2. Automatically delete backups up to 7 days

Select To_char (sysdate, ' Yyyy-mm-dd hh24:mi:ss ') from dual; --Show Current time2011-12-29 16:24:34Select Trunc (Sysdate, ' year ') from dual; -Interception to year (first day of this year)2011-1-1Select Trunc (sysdate, ' Q ') from dual;

1. Connect to a Linux server (enter the IP address of the server)SSH 10.199.94.227When the connection is successful, you will be prompted to enter the password.2. Switch to Operation Oracle databaseSu-oracleA successful switchover prompts an

In OracleYou can use the InStr function to judge a string to determine whether it contains the specified character.Finds the specified character in a string, returning the position of the specified character that was found.Grammar:InStr

Temporary tables in Oracle can be divided into session-level temporary tables and transaction-level temporary tables.The role of temporary tables: for large amounts of data we just need to query a subset of the result sets so that we can use

In an Oracle database, setting ID auto-increment is not as simple as MySQL, and a sequence needs to be set in Oracle.Now give the way, specifically as follows:First step: Create a tableCREATE TABLE Contestdb ( TID number () PRIMARY KEY,

DG is a backup recovery tool, but more strictly the meaning of it is disaster recoveryData Guard is a collection of one primary database and one or more standby databases, divided into two classes of logical standby and physical standby10.2.1

The thread must be specified in the RACTo add a log group RAC:ALTER DATABASE Add logfile thread 1 Group 1 (' +data/irac/redo01_1.log ', ' +data/irac/redo01_2.log ') size 1024m;ALTER DATABASE Add logfile Thread 1 Group 2 (' +data/irac/redo02_1.log ',

Oracle Notes (iv) Simple queries, qualifying queries, sorting dataFirst, simple querySQL (structured query Language) Structured Query language is a database query and programming language for accessing data and querying, updating, and managing

Oracle Notes (12) collections, sequencesFirst, the collectionIn the operation of mathematics there is the concept of intersection, difference, and, complement, and in the data query also exists this concept, there are several connection symbols:

Common oracle Database Management System Errors One of the common errors of the oracle database management system is as follows: Listener refused the connection with the following error:ORA-12519, TNS: no appropriate service handler foundThe

Understand the principle of null in depth and the principle of null in Depth -- Null principle -- oracle always treats null and null strings ''with the same length as 0. For example, ''is null is true,'' = null is false, if a varchar2: = ''is

Common oracle database management system errors (2 ), Oracle databases always encounter the following problems for new users: I believe everyone has encountered such a problem. To be honest, I have encountered such a problem before, but I am sorry