Reprinted: http://www.cnblogs.com/gkl0818/archive/2009/02/25/1397769.htmlOracle collectionsI. Types of Collections1. associative arrays ArrayIt is a one-dimensional, borderless sparse set of the same type and can only be used for PL/SQL.DeclareType
1. What is statistics:
Optimization statistics are collected to describe the database and database objects in more detail. These statistics are used to select the optimal execution plan for SQL statements. The optimized statistics include:
Table
Oracle basic concepts and comparison with informix
I. ConceptsUser: informix directly uses the user management system of the operating system. Generally, root and informix are used as super operators to manage other users. Oracle has its own user
The racle database system is a complex software system. Without understanding its internal structure principles and relationships, it is impossible to design and Compile High-Quality application software systems or manage a complex application
The following articles mainly describe how to efficiently Delete duplicate data from Oracle databases.) We all know that due to the rapid economic development, the enterprise scale is also growing rapidly, the related information and data volume are
Data Type
In Java virtual machines, data types can be grouped into two categories: the base type and the reference type . A variable of the base type holds the original value, that is, the value that he represents is the number itself, and the
Solutions to some problems that may occur during installation. It is worth adding to favorites and learning. For example, if a Chinese path is available during installation, the following error occurs: areasQueries
Solutions to some problems that
Oracle System RequirementsEnterprise Edition: Minimum cpu pentium 200 M recommended PENTIUMIII 1g or aboveMinimum Memory 128 M recommended 512 MHard Disk Space System Disk 140 M mounting disk 4.5G (FAT32) or 2.75G (NTFS)Standard Edition: Minimum cpu
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