Oracle

Problem one: such as Paugaca JDBC driver: Normally we have three ways to load drivers: 1) class.forname (string) this would like to be a class specified by a String that initializes the static content of the driver at load time, ClassLoader In

The company I serve not only has an Oracle database, but also has a SQL Server database, so I often meet people asking me two questions. The first type is usually "can you teach me to use Oracle?" In the beginning, my polite answer to this is

Do a C # and Oracle system, think of each client also install Oracle client is really troublesome, so the Internet search, whether there is no way to install the client, is really good, Oracle has already thought of this problem. On his website has

Sga_max_size Sga_max_size This parameter, as the name suggests, is used to control the maximum size of the SGA using virtual memory, where the meaning of virtual memory may be blurred, so that the maximum size that Oracle can allocate to the SGA in

What is CPU/PSU The full name of the Oracle CPU is critical Patch Update, where Oracle releases a security patch package for each quarter of its products, usually to fix security risks in the product. The full name of the Oracle PSU is patch Set

In Oracle 10.2.0.4 database, there is a slow SQL execution, more than a few minutes without results, waiting for the event is idle Sql*net message events, and finally forced to break. This SQL is an ordinary UPDATE statement that has multiple

Oracle's flash-back functionality restores a specified table in the event of an incomplete recovery of the database. The flashback database is a new method for point-in-time recovery, which enables you to quickly restore Oracle to a previous time to

A user-defined function is a block of code stored in a database that can return a value to the calling program. There are 3 types of arguments for a function: (1) in Parameter type: Represents an argument entered into a function that can only be

1. Estimated implementation plan-Explain plans Explain plan takes the SQL statement as input, gets the execution plans for the SQL statement, and stores the execution plan output in the schedule table. First, in front of the SQL statement you want

Sql_trace is an Oracle-provided tool for SQL tracing and is a powerful aid diagnostic tool. Sql_trace is a very common method in the daily diagnosis and resolution of database problems. In this paper, the use of Sql_trace is discussed briefly, and

Rman Learning Summary as follows, has been tested run, no problem. 1. Set the database as the archive mode Check Archive mode Select Log_mode from V$database; If noarchivelog, it needs to be set to archive mode Shutdown immediate; Startup

Often have friends ask the row and column conversion problem, the message board also has such a question. In fact, the use of analytic functions to deal with is a good way to turn over Tom's book, one of the examples included here. For example, to

Links between databases are built on database link. To create a DB link, you must first set up the link string on each database server. 1, configure TNS, $ORACLE _home/network/admin/tnsname.ora 10gstandby = (DESCRIPTION = (address = (PROTOCOL =

The processor changed from 32 bits to 64 bits, and after the Oracle software was replaced, the db I chose to migrate the cold standby direct hook, and then the problem was encountered after the migration. After a successful mount of DB, errors such

The method of comparison of integers in a Shell and the method of comparing strings, such as equals, not equal to, greater than, greater than or equal, less than, etc. Binary comparison operators, comparing variables or comparing numbers. Notice

1. Re-create initialization files, important parameters

1. Install Fedora2 2. Download oralce10g (www.oracle.com), general installation simply download ship.db.cpio.gz 3. untie [Oracle @oar10g oracle]$ cd/tmp [Oracle @oar10g oracle]$ GZIP-CD ship.db.cpio.gz | Cpio–idmv 4. Modify the Linux system

There are a variety of data stored in the Oracle database, some of which are growing larger over time. such as friends chat log, SMS send and receive log, production system log, dynamic website Publishing system log and so on. This information is

Objective The vast majority of Oracle database performance problems are caused by unreasonable database design, only a small number of problems rooted in db Buffer, Share Pool, Redo Log buffer and other memory module configuration unreasonable, I/O

Problem:1, at the same time install desktop, engine,engine part of the control can not be used, always prompted to authorize.2, will desktop uninstall, engine most of the controls can be used, a small number of can not be used. Key issues:There is