Oracle

Copyfrom Https://www.cnblogs.com/zhaoguan_wang--1. Blocking and waiting for event information query--Query the status of all sessions, the wait type, and the SQL script that is currently executingSelect T.sid, t.serial#, T.status, T.event,

--declaring cursors; cursor cursor_name is select_statement--for Loop Cursors--(1) Defining cursors--(2) Defining cursor variables--(3) Use this cursor with a for loopDeclare--type definitionCursor C_jobIsSelect Empno,ename,job,salFrom EMPwhere job=

First, create a table:CREATE TABLE Example (ID number (4) not NULL PRIMARY KEY, NAME VARCHAR (25));Then, customize a sequence (sequence):1--1-------not built bufferCreate a second trigger:CREATE TRIGGER Example_triger before INSERT on example for

Ora-01034:oracle not availableora-27101:shared memory realm does not exist process id:0 session id:0 serial number: 0 Because of this little mistake, tossing me for a few days, special record as follows 。 Internet search for the next solution, as

Create Tabletm_app_main_bak as SELECT * from Tm_app_main;Update Tm_app_main Set id_no = ' 110000 ' | | SUBSTR (id_no,7), unique_id = ' I ' | | ' 110000 ' | | SUBSTR (unique_id,8), cellphone = ' 12345678901 ';Select P.abode_detail from

View tablespace usage first for probability 1SELECT UPPER(f.tablespace_name) "tablespace name", D.TOT_GROOTTE_MB "table space size (M)", D.TOT_GROOTTE_MB-f.total_bytes "used Space (M)", To_char

Import= cx_oracle.connect (' user name/password @ip/servicename'#1 parameters = Cx_oracle.connect (' username ' ' password ') ip/servicename'#3 parametersOpen the Tnsnames.ora under the D:\app\username\product\11.2.0\client_1\NETWORK\ADMIN

The SSH framework, which prompts for information when inserting a picture into oracle11g.The image is byte[] the Blob field in the corresponding database, the error reason is the Oracle version problem, different versions are processed

One, decode () function1. GrammarDECODE (Control_value,value1,result1[,value2,result2 ...] [, Default_result]);Control _value: The value you are trying to process. The decode function compares this value to the subsequent sequence of even orders to

Sql_trace is a powerful auxiliary diagnostic tool provided by Oracle for SQL tracing. In the diagnosis and resolution of daily database problems, Sql_trace is a very common method. 1. Enter the host of the database with Putty or other host tools.2.

from:http://blog.csdn.net/chid/article/details/6166506Linux under Change Oracle client Character set and service-side character set1.Linux under Change Oracle the client character set, which sets the environment variable " Nls_lang " the valueTo

Problem encountered: Ojdbc.jar packet errorReason: Because Oracle's Ojdbc.jar is charged, there is no such resource in the MAVEN central repository, and can only be loaded into the project by configuring a local library.Workaround:(if MAVEN is

A view is a virtual table that uses the CREATE VIEW statement to define the view, which is a logical table based on one or more tables or views. A view itself does not contain any data, and the table on which the view is based is called the base

Recently I have been asked if I have oracle11g database official reference documents, I think, this is not available on the official website can be downloaded, doubts, asked after the know, his official website to find, but when not found. Do not

Return line breakChr (10) is a newline character,Chr (13) is the carriage return,Add line breakSelect ' '| | || ' Set valid_state = "' 0A "' ; ' || Chr| | ' commit; ' from User_tablesRemove line breaksSelect ID,replace(Content,to_char (CHR)

background: The production environment has Oracle server, there are several database users, need to back up the database user data through exp, need to patrol the results of database backup.Objective: to perform periodic backups via Linux

First, create a userOverview: In Oracle, to create a new user using the Create USER statement, you typically have DBA (database administrator) permissions to use.Create user username identified by password;Note: Oracle has a problem, the password

The usual functions for handling strings are as follows : No. Name of function Meaning 1 UPPER (C1) To capitalize all strings 2 LOWER (C1) Convert all strings to lowercase

Premise:1, please be sure to install Oracle at win at least 5 times.2. Be sure to master the basic Linux commands.Prepare the Oracle linux64-bit installation package (official download of 2 compressed files)Ready virtual machine VMware and Linux

CREATE OR REPLACE Package dbc_cryptor is SYSKEY VARCHAR2 (16): = ' 0000000012345678 '; FUNCTION encrypt_3des (v_str in VARCHAR2, V_key in VARCHAR2 DEFAULT SYSKEY) RETURN RAW; FUNCTION decrypt_3des (V_raw in Raw, V_key in VARCHAR2 DEFAULT SYSKEY)