Oracle

MOS has a lot of articles, basically can not run the following three points:Setup can make a big difference1. Network Topology and load2. NFS mount Options (choose the appropriate mount option)3. TCP configuration (Configure the appropriate MTU,TCP

Today, we encounter a problem with SQL converting to Oracle statements, which is described as follows:Select*from emp orderby Deptno; Select*from dept; SQL Server:Update Dept A set dname= (select top 1 ename from emp where Deptno

For example, execute a statement:Insert intonsrxt_sp (sp_id, Sp_title, Sp_desc, Sp_url, Sp_type, Sp_sub_type , Add_time, CZRY_DM)Values(227,'"Reminder" New income tax returns fill in Tips',NULL,'http://hdsw.wangzhanbaomu.com/index.php?g=wap&m=index&

Enter the root user to do the following1. View the Oracle installation directory[Email protected] db_1]# pwd/u01/app/oracle/product/11.2.0/db_12. View the DB instance name[Email protected] db_1]# echo $ORACLE _sidoradb3. Modify the configuration

ALTER DATABASE datafile ' C:\ORACLEXE\APP\ORACLE\ORADATA\XE\SYSTEM. DBF ' Resize 4096M; SELECT used. Tablespace_name, used. Used_bytes as "used SPACE (in GB)", free. Free_bytes as "Free SPACE (in GB)" from (SELECT Tablespace_name,to_char (SUM (NVL

1.dual is the smallest worksheet provided by Oracle, with a single row and special features.The table structure of the 2.dual is as follows3. It is an internal table under the SYS user, all users can access it, whenever this table exists.4. Use:1>

MiddlewareERP SAP5.BI Business IntelligenceOracle Post try to choose the part of * * *Development DBAs can also be called Assistant DBAsDBA : Party A or factory-based Party A monitoring, tuning Party b to implement the wrong to dry Party

Universal Oracle has three ways to implement paged queries through the implementation of various rownum, ROWID, or analytic functions. This will be the test table User_info case, a brief implementation of the three main kinds of paging:--Create

Oracle's SGA: The system global area of a database, the SGA consists mainly of three parts: a shared pool, a data buffer, and a log buffer. A shared pool is made up of two parts: a shared SQL area and a data dictionary buffer.the shared SQL zone

Recently in the strengthening of Oracle query, on the Internet to see a good video, take the study notes and share with youSyntax of the Oracle subquery (that is, the nesting of the SELECT statement)Questions to note about subqueries:1. Parentheses

Oracle Array type oracle array type, example: SQL code  create or replace function my_test (p_str varchar2)  return number  as - -Common variable  v_var varchar2 (1000);  --fixed-length array  type v_ar is Varray (30) of VARCHAR2;   my_ar V_ar:=v_ar

 --first create a temporary tablespace create temporary tablespace test_temptempfile  ' path ' size 32mautoextend  onnext 32m maxsize 2048mextend management local;--Creating Tablespace Create tablespace  test_dataloggingdata  ' path '

Requirements: Oracle Database Delete Deletes the normal heap table thousands history.Effects of direct deletion:1. An issue that could result in a final deletion failure due to insufficient undo table space;2. May cause the Undo table space to be

Oracle Stored Procedure Definition and debugging, and finally called code by C # C # Call a stored procedure I have read a lot of articles and wrote the following text to share it. Purpose: To change the credits and perform a certain

Profile_oracle setting a User Password Never Expires Setting a user password in oracle never expires   Set the password for the ETL_TEST user to never expire. Select * from dba_users where username = 'etl _ test '; View the dba_users dictionary to

Oracle data dictionary and oracle dictionary Data Dictionary-Overview The name of an Oracle Data Dictionary consists of a prefix and a suffix. it is connected by an underscore (_). Its meaning is as follows: ● DBA _: contains information about all

Conversion differences between Oracle and MySQL 1. nvl function. In Oracle: nvl (join_count, 0) MySQL: if (join_count is null, '0', join_count) 2. String connection. "|" Is used for connection in Oracle, and CONCAT is used for connection in

About Oracle10g schedulejob -- Job permission grant create job to somebody; -- job creates a queue (job_name => 'agent _ LIQUIDATION_JOB ', job_type => 'stored _ PROCEDURE', job_action => 'agent _ LIQUIDATION. LIQUIDATION ', -- Name of the stored

New Feature of oracle12c-pluggable database (PluggableDatabase, PDB) 1. Advantages of new features of 12c PDB 1) Multiple PDBs can be integrated into one platform. 2) A new PDB or an existing PDB clone can be provided quickly. 3) through the

[Oracle] restore all redo logs physically deleted when the database is running Lab environment: OEL5.6 Oracle11.2.0.1 Lab started: Database running status, delete all logs: [Oracle @ itaa test] $ ls Control01.ctl redo01.log sysaux01.dbf