Oracle

The Cast usage of Oracle is often seen in the SQL of the predecessors, for example: www.2cto.com with t as (select level | ''l from dual connect by level select cast ('192. 100' as number (123) as num from dual;

ORACLE: ORA-12560 solution today when oracle Data imp/exp was suddenly found in cmd execute exp input scott/tiger prompt: EXP-00056: encountered ORACLE error 12560ORA-12560: TNS: protocol adapter error EXP-00000: Export termination failed to start

To modify the linux host name of Oracle, the original host name is centos, change to test 1, modify vim/etc/hosts vim/etc/sysconfig/network service network restart in linux, and modify the Oracle configuration. At this time, the Oracle instance is

Oracle index monitoring and foreign key index Oracle monitoring index features provide us with a general condition to determine whether the index is used. This is because the index is monitored when statistics are collected in Oracle 10 Gb, which is

Use of DBMS_SCHEDULER 1. Use DBMS_SCHEDULER.CREATE_JOB to directly CREATE a job [SQL] CREATE TABLE T_ROSANU (R_ID VARCHAR2 (10), R_DATE TIMESTAMP (6); -- the TABLE has been created. BEGIN DBMS_SCHEDULER.CREATE_JOB (JOB_NAME => 'job _ create_rosanu ',

The left and right connections in oracle saves the complex join statements (left join and right join) in SQL server, which are represented by a "(+. In the following experiment, query 1 and query 2 are equivalent, and query 3 and query 4 are

Use EM to view the tablespace ViewNow let's take a look at how to use EM to view the table space view.Under Administration-Storage-Tablespaces, you can view table space indicators:For example, the table space usage, total size, remaining space, and

Oracle bitmap index B-tree index is a common index in Oracle. It is the default index type when creating an index. A maximum of 32 columns can be included. The bitmap index Oracle creates a bitmap for each unique key and saves the ROWID associated

Common Methods for moving oracle files-moving tablespace files 1. querying the table space file name SQL> select d. name from v $ datafile d join v $ tablespace t using (ts #) where name = 'xport'; 2. Disable Database SQL> shutdown immediate; 3.

Installing oracle 10 Gb has encountered the cannot open shared object file error and solution [root @ dba ~] # Su-oracle [oracle @ dba ~] $/Mnt/runInstallerStarting Oracle Universal Installer... checking installer requirements... checking operating

PL/SQL Application Operation instance and resolution [SQL] declare msg char (15); -- defines the variable begin msg: = 'hell '; -- assign the value dbms_output.put_line (msg); end; -- The declared type is emp. sal type variables are consistent with

64-bit Windows 7 ORACLE garbled by numbersFirst, plsql developer directly reports an errorNLS_LANG ErrorThe first step is to testC: \ Users \ XJY. xjy-PC> set NLS_LANG = SIMPLIFIED CHINESE_CHINA.ZHS16GBKAfter SET NLS_LANG is foundThen check the

Oracle listening service forced shutdown cannot start TNS identification Problem Solving Problem description: a while ago, when I went home while working on the project, I found that I could not connect to PLSQL. Then I found that tnslistener was

Oracle Data Sorting-start with connect by prior: to delete a menu in a recent project, delete all the child nodes with this node as the parent node, including the parent node. Since I am not very familiar with oracle, I am dumb to write this method .

Sqlplus ora-12514 SolutionSearch file: [html] tnsnames. oraEdit: Add [java] # ----------------------------------------------------------------- to the last line.Locals =(DESCRIPTION =(ADDRESS = (PROTOCOL = TCP) (HOST = 127.0.0.1) (PORT = 1521

VLDB large database partition table list Partition Table detailed list partition list partitions explicitly specify partitions based on a specific value of a field, rather than partitions based on the value range of the field as the range partition.

Oracle experience 4 -- set query @ multi-table join in oracle @ Case study 1. A Brief Introduction to the union of query keywords in a set: union (returns all records of the Two sets after removing duplicate elements) union all (returns all records

Introduction to Oracle built-in subroutines SQL> set serveroutput on; SQL> remark built-in package SQL> common built-in packages of remark are as follows: SQL> Input and Output in remark DBMS_OUT PL/SQL display SQL> remark DBMS_JOB Task Scheduling

Oracle searches for and deletes repeated records in a table: a field in an application table is a primary key. when inserting data into a table, the data is first placed in a temporary table (without a primary key) then insert the application table.

How can I recover the Oracle database for the first time! I have been familiar with oracle for several years, but I have been engaged in development for a long time, and there are very few opportunities to back up data. Recently, the company's ERP