Oracle

First connect the Sqlplus:Sqlplus/nologConn System/manager1. Manually create a directory to hold the exported DMP fileCreate or replace directory Whboa as ' E:\oracleDate\dmp ';2. Authorizing the CatalogGrant Read,write on directory Whboa to public;3

---view tablespace name and file location: Select Tablespace_name, file_id, File_name,round (bytes/(1024*1024), 0) Total_space from Dba_data_ Files ORDER BY Tablespace_name---How to see if the Oracle Tablespace is automatically expanded

Focus on table creation and operation syntax (how to create and design table is something)Common data typesA table is essentially a collection of data operationsData type:No matter how many types of data you extend, the following are some commonThe

Example 1:Delete from where exists (Select1fromwhere a.id=b.id)Example 2:The Rebatepolicy table is the primary table, Rebatepolicyitems is the primary key from the table that has the primary table, and now the corresponding sub-table of the data

First, start and close the database1. How to start a databaseSqlplus/as SYSDBA---login databaseSql> Startup---Start the database2. How to confirm that the database has been startedMethod One:Ps-ef | grep PmonMethod Two:Sqlplus/as SYSDBA ---login

First, start and close the database1. How to start a databaseSqlplus/as SYSDBA---login databaseSql> Startup---Start the database2. How to confirm that the database has been startedMethod One:Ps-ef | grep PmonMethod Two:Sqlplus/as SYSDBA ---login

First, in Oracle, enter select Userenv (' language ') from dual to find out how the encoding used by Oracle is, and mine is simplified Chinese_china. ZHS16GBK. AfterStart-run-Enter regedit-carriage Enter the registry, click

First, IntroductionStored procedure: is a program created in the database for others to call. Actually, I feel like I'm defining a method.Two, no parameter stored proceduresAs below, the classic output "Hello world" to get started stored

* Related environment: Windows 10, 64-bit operating system, Oracle 11gr2;toad for Oracle12.1 Recently in the Learning Oracle database, using Toad for Oracle to view the database information, found in the SYSDBA role in the database, regardless of

Excerpt from: http://www.poluoluo.com/jzxy/201004/81921.htmlThe Baidu Library also documents the use of the over () analysis function in OracleThis function was discovered inadvertently in the jar, only to know that the Oracle analysis function is

installation WebLogic Data Source -oracle650) this.width=650; "Src=" Http://s2.51cto.com/wyfs02/M01/8B/7F/wKioL1hP0H3QS6TEAAHtoDjEMhc656.jpg-wh_500x0-wm_3 -wmp_4-s_2228899324.jpg "style=" Float:none; "title=" 1.JPG "alt=" Wkiol1hp0h3qs6teaahtodjemhc6

The eye of Hang Seng technologyauthor Lin JingzhongThere are several aspects to the operation of a business system: functionality, stability, efficiency, security. The performance of a system includes network performance, application performance,

SequenceCreated in sequencesRoleGenerate an auto-grow (or decrease) integer valueUse when adding data frequently, controllability is goodnotation: sequence name. Nextval Gets the next sequence valueThe sequence name. Currval Gets the current

1. Convert the Oralce database on the server to DMP and then import the local temp library2. Change the date in the Oracle table to timestamp;A. Create a table first CREATE TABLE Type_table_info ( table_name varchar2 (), column_name varchar2 (

SYS as[email protected]>startup open;ora-32004:obsolete or deprecated parameter (s) specified for RDBMS instanceORACLE instance started.ORA-32004: does not affect the use of the database. The error message is a parameter expiration. You can see the

Start oracle11g emctl start Dbconsole report the following errorenvironment variable oracle_unqname not defined. Please set Oracle_unqname to DaEnter Export ORACLE_UNQNAME=ORCL (instance name) at this timeRe-enter EMCTL start Dbconsole report the

When learning about Oracle's view, it is very different to understand that the records of data in Oracle are paginated and that MySQL provides a limit for paging, and that limit is a unique keyword in mysql.So how do you implement paging for records

One, pre-upgrade backup1. Software backup[Email protected] backup]# su-oracle[email protected] ~]$ CD $ORACLE _home[Email protected] db_1]$ pwd/db/oracle/oracle/product/10.2.0/db_1[Email protected] db_1]$ tar-cvzf ora_home.tar.gz.Software upgrade is

In database design we can define the table ID as a stringThen we can use the sequence to get a unique ID.Handwriting a mapper:"1.0"encoding="UTF-8"? >"-//mybatis.org//dtd Mapper 3.0//en"

Query Database encoding:SELECT * from Sys.nls_database_parameters;SELECT * from Sys.nls_session_parameters;Replace function:Update Table 1 T set t. Column 1=replace ((select column 1from table 1 A where a. primary key column =t. Primary key column),