Oracle

1. Simple introduction to the collection query Key words Union: Unions (returns all records after two sets remove duplicate elements) UNION ALL (returns all records of two sets, including duplicates) Intersection: Intersect (returns records that

I. Temporary table space contraction 1.1 Description About Oracle's temporary tablespace, a blog has been collated before: Oracle Temp temporary table space http://blog.csdn.net/tianlesoftware/article/details/4697417 The following operations can

Background information: After the main library is switched switchover or failover, the client is able to obtain its own connection to the main library. Environment modification:1. Modify $oracle_home/network/admin/tnsnames.ora priocm=

Because Toad does not support 64-bit Oracle clients, you will uninstall the client that is already installed Official website Uninstall Instructions: Http://docs.oracle.com/cd/E11882_01/install.112/e10844/deinstall.htm#BABHIGFE Website download

Start genymotion problems Unable to start the virtual Device,virtualbox cannot start the virtual device Double-click Oracle VM VirtualBox Not responding I am win10 64, said online is not compatible with what, to download a new one is OK For this

Oracle to Oracle version Usually to the customer production environment deployment reference documents, summary of the more detailed, mainly detailed description of the process of data initialization, parameters of different environments, so just

The biggest feature of sharding database is that it can be scaled horizontally. However, horizontal scaling is not a horizontal extension of the RAC, and pure sharding DB does not have an HA schema. That is, a shardcat db, multiple Shard node db. No

Oracle Data type detailed---date type Oracle data types look very simple, but there are a lot of knowledge to use, this article is my Oracle date data types of the collation, are the development of introductory materials, to share with you:Note:

1. Absolute value: ABS ()Select ABS ( -2) value from dual;2. Rounding function (Large): Ceil ()Select Ceil ( -2.001) value from dual; (-2)3. Rounding function (small): Floor ()Select Floor ( -2.001) value from dual; (-3)4. Rounding function

--First Add PRIMARY KEY constraintALTER TABLE studentAdd constraint Pk_student_sno primary key (SNO)--Delete ConstraintALTER TABLE studentDrop constraint Pk_student_sno--not NULLALTER TABLE studentModify (sname varchar2 (+) NOT NULL)--check CHECK

Querying online log files sql> col member for a50sql> select group#,status,type,member  From v$logfile;       group# status    ts  type         member---------- --------- --------- ------ --------------------------------------------------          3 

Import java. SQL .*;   Public class ora8iconnect{Public ora8iconnect (string dB, string ID, string PWD){Dbname = dB;Userid = ID;Userpwd = PWD;Beginconnect (); // connect to the database}/*-* Returns a connection object.*/Public connection

After installing grid infrastructure, RAC will focus on installing the Oracle software on the cluster. Grid infrasctructure provides a framework for running RAC, including cluster communication links, node separation, and node member relationships.

I am usually busy with my work, and I still have the burden of study and support. not much time. This post is a simple document mainly intended for Oracle-based technical personnel. if I have time, I will post a more detailed document. thank you for

With the official release of Microsoft's next-generation operating system Windows 7, more and more friends are using Windows 7. Many people have encountered some problems when installing oracle in Windows 7, some even raised the question that

By separatingSQL statement for local range data scanning Generally, it is more effective to put all components of an SQL statement that implements a function together. However, in a few cases, the SQL separation method is more effective. This

  Due to the limited number of digits, The 32bit Oracle process can only access virtual memory addresses below 4 GB (the power of 2), which is a headache in many cases, because a lot of memory is left empty, the SGA cannot exceed 1.7 GB by default.

Based on Metalink 362496.1 From the document, the XML Publisher version is not directly available. The most useful is to query its version from the generated report.The details are as follows,PDF output: open the file in Adobe Acrobat-> Menu file->

Yesterday, a colleague reported that when Oracle9i was used, the service name was successfully configured in the net assistant, but it was always unable to connect when SQL * Plus and other client tools were used. · First, check whether the service

(I) Definition Orion (Oracle I/O calibration tool) is a bottleneck provided by Oracle for testing storage system performance. As Orion is an independent tool, you do not need to create or run an Oracle database. Orion is very simple to use. You can