Oracle

Bitmap indexing is an anomaly in the Oralce database index, which has outstanding performance in some special occasions. In general, the effect of a bitmap index is directly related to the cardinality of the column. For this reason, when it comes to

Given below is a list of datetime data types and examples of Values stored in them into a random order: Datatype Example 1) INTERVAL year to MONTH a) ' 20030415 8:00:00 8:00 ' 2) Timestampwith local time ZONE b) ' +06 03:30:16.000000 ' 3)

1, Partition table: (>2G) to optimize the large table (Range partitioning,list partitioninghash partitioning,composite Partitioning) --Create a partitioned table by range 1 CREATE TABLE Sales_range 2 (salesman_id number (5), 3 Salesman_name

SQL Server and Oracle these two databases, in addition to some technical differences, in the implementation costs are also relatively large differences. The following author on this aspect of content to express some of their views, I hope to be able

In Oracle 10G, the concept of a Recycle Bin (recycle Bin) is introduced. 　　 The Recycle Bin, in principle, is a data dictionary table, where the user drops the database object information. The object that the user is dropping is not deleted by the

oracle| Index In oracle9i we know that we can use the Jump Index Scan (index Skip Scan). However, there are some limitations to the use of jumping index scans. From Oracle's documentation we can find this: Index Skip Scans Index skip scans

oracle| Error | data | Database Oracle database configuration error message Oralce database error messages often appear, we see the wrong code, as to what the wrong reason is still 1:30 will be difficult to answer, so put some common mistakes

Oracle Domestic Oracle Related site name address introduction Oracle China company HTTP://WWW.ORACLE.COM/CN provides the latest product and service introduction. China Oracle user group Http://www.cnoug.org/ORACLE enthusiasts home

Oracle Discussion on Oracle Job (Job) Update next_date The author of this article: Kamus (Kamus@itpub.net) Summary: This article analyzes the mechanism for modifying the next execution time during Oracle job execution through experiments and

oracle| Safety | Safety Problems | Problem database security problem has been one of the focus of attention, we know that a business or organization of the database if the hacker attacks, and these databases and the preservation of very important

oracle| View | data | Database Oracle database Data objects are the most basic tables and views, others are constraints, sequences, functions, stored procedures, packages, triggers, and so on. The operation of the database can be basically

oracle| Data | Database Overview: Oracle relational database system has been widely used for its excellent performance, and ensuring database security is an important part of database management work. On the basis of summarizing the security

oracle| Data | Database in the database operation is often the case occurs, due to a momentary negligence and mistakenly deleted or mistakenly changed some important data, in addition to some important tasks need to run periodically. Obviously, the

Oracle SQL Tuning Oracle's SQL tuning is a complex topic, and even a whole book is needed to introduce the nuances of Oracle SQL tuning. But there are some basic rules that every Oracle DBA needs to follow, and these rules can improve the

oracle| Objects | data | Database Oracle database Data objects are the most basic tables and views, and other constraints, sequences, functions, stored procedures, packages, triggers and so on. The operation of the database can be basically

Oracle 2Gb or not 2gb-file limits in Oracle Translation: Kamus (Seraphim) Correction: Bloomit Mail: kamus@itpub.net Date: 2004-1 It is often heard that when importing the export, when the backup is restored, when the Sql*loader imports the

Oracle in Oracle 8i, there is often a situation in which you want to run operating system commands in a stored procedure. Typically, you can do this by using Oracle Enterprise Manager to set up jobs. However, due to the lack of flexibility of the

oracle| Resolution | String System.Data.OracleClientOracleConnection.ConnectionString property The following table is ConnectionStringA valid name is listed in the value in the Name Default value Description Data source

Example Description: (1) Create 2 table spaces first. Create tablespace user01 datafile ' +dg1 ' size 1M; Create tablespace user02 datafile ' +dg1 ' size 1M; (2) Create a table on each table space. CREATE TABLE Scott.customers (cust_id

Rollback segment management is always a difficult problem in Oracle database management, this paper introduces the concept, usage, planning and problem solving of Oracle rollback segment through an example. Rollback Segment Overview The rollback