Oracle

See Tan Huaiyuan-Database pilotage was hit by the business of the Heart O (╯-╰) oI. Environment variablesoracle_home--Database Base directory: Oracle's Product catalog. Additional Oracle products can be installed here.oracle_base--database software

It is sometimes necessary to modify the data in large areas, this time with a circular statement efficiency is not high. The cursor seems like a good choice when the temporal table doesn't meet the point-to-point modifications (PS: It's like a

Oracle MinuskeywordMinuskeyword in SQLThere is a minuskeyword in SQL that uses two SQL statements to find out the results of the first SQL statement, and then see if the results are in the results of the second SQL statement. If there is, then this

1.SetServeroutput on; Declare CursorTem_cursor is Select * fromXuesheng xs; V_row Tem_cursor%RowType;begin OpenTem_cursor; LoopFetchTem_cursor intoV_row; Exit whenTem_cursor%NOTFOUND; Dbms_output.put_line (v_row.xing_ming);

What situation? Ningbo _ Air 15:17:40 Ningbo _ Wind 15:17:49 default configuration path Ningbo _ Air 15:18:09 Ningbo _ Yi Feng 15:19:13 i used to be in the sample file configuration and

First, the Classification of rights:System permissions: The system specifies the user's permission to use the database. (System permissions are for users).Entity permissions: A permission user's access to other users ' tables or views. (For a table

--Build TableCreate TableXuesheng (IDinteger, xing_mingvarchar2( -), Yu_wen Number, Shu_xue Number);Insert intoXueshengValues(1,'Zhangsan', the, -);Insert intoXueshengValues(2,'Lisi', -, the);Select * fromXuesheng;--Create a first stored

# Listener.ora Network Configuration File:/u01/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora# Generated by Oracle configuration tools.LISTENER =(Description_list =(DESCRIPTION =(ADDRESS = (PROTOCOL = IPC) (KEY = EXTPROC1521))(ADDRESS

explain Plan  for Selectcfg_id,COUNT(0) Total   from     and service_type = and found_time >=       to_date ( ' 2014-07-08 00:00:00 ' ,      and        to_date ( ' 2014-07-08 16:00:00 ' ,  and (cfg_id in       (' 30811

Method One: Sqlplus "user/password as SYSDBA" Sqlplus "Sys/sys as SYSDBA"Method Two: Sqlplus/nologSql> Conn/as SYSDBAsql> shutdown immediate;Sql> Startup Mountsql> ALTER SYSTEM ENABLE RESTRICTED SESSION;sql> ALTER SYSTEM SET

Standard blocks are used for temporal and system tablespaces, and are also the default values for a tablespace data block. The size of the standard data block is determined by the parameter db_block_size when the database is created. To change this

First, the cause of the problem:A new feature in 11G that does not allocate segment when the table has no data to save space1, insert a row, and then rollback will produce segment.The method is to insert data into the empty table and then delete it,

1. Create a student management database with the name student2. Include at least three sheetsS (sno,sname) student relationship. SNO for school number, SNAME for nameC (cno,cname,cteacher) course relationship. CNO as course number, CNAME as course

In a database, it is sometimes necessary to determine whether a string is one or more mailbox formats, which can be judged using the following statement:SELECT COUNT (1) FromWHERE regexp_like (v_mail,'^\w+ ((-\w+) | ( \.\w+)) *\@[a-za-z0-9]+ ((\.|

Log in to the database with Conn/as sysdba.First: Create a new userCreate User by test02 (test01 for user name, test02 for user password)Second: Give basic permissions to database operationsGrant to test01;Three: Create a table spaceCreate the

1 Check the installation of the System Package Rpm-qa|grep BINUTILSRPM-IVH sysstat-7.0.2. rpmbinutils-2.17.50.0.6compat-libstdc++-33-3.2.3compat-libstdc++-33-3.2.3 (32bit) elfutils-libelf-0.125elfutils-libelf-devel-0.125gcc-4.1.2gcc-c++-4.1.2glibc-2.

How to delete oracle11g cluster nodes in a linux & amp; UNIX environment step by stepDeleting a Cluster Node on Linux and UNIX Systems 1. Check whether the node to be deleted is active or pinned.$ Olsnodes-s-t If pinned, crsctl unpin css-n unpinned

Parallel query of Oracle uses multiple Server processes at the operating system level to complete an SQL query at the same time. This article describes how to solve an error in parallel query of Oracle databases as follows: 1. Error description

In essence, the parallel operation feature of Oracle databases is to forcibly extract idle resources (mainly CPU resources) from the database server and divide and manage some high-load big data. Parallel operations are a non-deterministic

Method 1:[Root @ vmrac1 ~] # Su-grid[Grid @ vmrac1 ~] $ Sqlplus/as sysasmSQL * Plus: Release 11.2.0.3.0 Production on Thu Jul 3 09:36:27 2014Copyright (c) 1982,201 1, Oracle. All rights reserved.Connected:Oracle Database 11g Enterprise Edition