Oracle

Objective:Previously used to generate tablespaces using Oracle's tools, today we see a more convenient and fast way to---using Database scripting./* divided into four steps *//* 1th step: Create temporary tablespace */create temporary tablespace

1 SELECT 2EXTRACT ( Day fromDT2-DT1)* -+EXTRACT (HOUR fromDT2-DT1)||':'||EXTRACT (MINUTE fromDT2-DT1)||':'||EXTRACT (SECOND fromDT2-DT1)3 from(4 SELECT 5To_timestamp ('2014/12/03 00:00:00','YYYY-MM-DD HH24:MI:SS') DT1,6To_timestamp ('2014/12/04 23:

Other people visit me when prompted no listener, ping can ping through,TNS configuration is correct, according to the internet, I will be the Tnsnames.ora, Listener.ora in the localhost are changed to the local IP or the computer full name of the

In the project database design process, because the data volume of the single table is very large, the table needs to be partitioned. Because the data in the table is a historical transaction, it is partitioned by month to improve the query and

[SQL]View Plaincopyprint? Sql> Show Parameter Open_cursors -the maximum number of cursor (cursors) that can be opened at the same time per session NAME TYPE VALUE ------------------------------------ ----------- ---------------------------

This section summarizes: This section describes the use of Oracle's own jobs to enable Oracle custom timed execution tasks. 1. Introduction Custom timed tasks have two forms, system level and database level, from the operating system level, the

The database instance was created in the previous installment, but there was a problem when the DB instance was last accessed with EM?Enterprise Manager cannot connect to the DB instance. The status of the components is listed below.To answer the

Install Oracle 11G 64-bit errorError message: prepare to start Oracle Universal installer/tmp/orainstall2012-07-25_03-10-02pm from the following address. Please wait ... [[email protected] database]$ # # an Unexpected error have been detected by

Select Sysdate now,sysdate+numtodsinterval (1, ' second ') Add1second,sysdate+numtodsinterval (1, ' minute ') Add1minute, Sysdate+numtodsinterval (1, ' Hour ') add1hour,sysdate+numtodsinterval (1, ' Day ') add1day,sysdate+numtoyminterval (1, ' Month

First, create a tableGrammar:CREATE TABLE [schema.] Table(column Datatype[,column datatype[,...]);DescriptionCREATE TABLE: A keyword for creating tables.Schema: Represents the owner of the object, which is the name of the schema, and if the user

recent projects, encountered a base station data model, this base station has 7 major properties, each property below the second layer has a number of properties, the second layer below the third layer of a number of properties, until the fifth

If you need to create a job with parameters, how to create it.We declare the parameters directly, assign them, and then pass the stored procedure to the job call.For example, the stored procedure is named Pro_test_job, and the parameters have one,

Commit is equal to commit in procWhen you do insert or UPDATE, the commit is actually modified or inserted into the database.If you don't commit, the watch will be locked.CURSOR MyCursor is--defining the tour targetSELECT

11th Chapter Other database objects1. What is a sequence?Sequence: Provides a regular value.Sequence: A database object that can be used by multiple users to produce unique valuesAutomatically provide a unique valueShared objectsPrimarily used to

You are using a Automatic Storage Management (ASM) instance to MAnage the files of your production database. You have both disk groups, Dg1and DG2 with one device. In the parameter file of the ProduCtion database, the following parameters has been

Seventh chapter creating and Managing Tables1. Common database objectsObject DescriptionA table's basic collection of data stores, consisting of rows and columns.Views The logically related collection of data that is extracted from the table.The

Tag:io    use    for   on    data    ef    amp   as    time     /*1.flashback query*/--flash back 15 minutes ago Select * from orders as of timestamp (systimestamp-interval "" Minute ") where ... You can replace minute with day, SECOND, month, for

A piece of high-quality SQL starts from asking questions (notes), high-quality SQL notes First of all, the purpose of SQL writing is to solve the problem. Therefore, only by understanding the problem to be solved can we write more efficient SQL

How to handle Integer/DBNull in Oracle I used to think that integer = number (10,126) -- 38 is the maximum precision of number integer is a super large data type, the maximum value can be expressed as power) -1 because one byte represents a maximum

Impdp terminate ORA-7445 due to fatal errors [kpodpals]It was difficult to successfully export all the data to the user the day before yesterday. Today, the user told me that the exported data could not be imported. First, ask the user for any error