oracle table type variable example

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

With the specific input values, the selectable rate (selectivity) of the Where condition of SQL and the number of rows (cardinality) of the result set may vary, The value of selectivity and cardinality directly affects the CBO's estimate of the cost

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

A table generally refers to a relational table, and it can also generate object tables and temporary tables. Total, the object table is generated from a user-defined data type, and temporary tables are used to store temporary data that is dedicated

Ing between MySQL and Oracle Data Types (table form), mysqloracle MySQL and Oracle databases are usually used at work. Because of some differences in data types between MySQL and Oracle, the following describes the relationship between the data

Oracle Table: Data Definition Language (DDL) ) 1 Naming rules and conventions:The maximum length of the table name and column name is 30. The table name and column name must start with a letter. The table name or column name cannot contain blank or *

Racle text translation is one of the key technologies of intelligent information Management, Oracle text as a component of Oracle9i provides a powerful Full-text search function, use oracle9i to do background database, can make full use of its

In Oracle, for a committed SQL statement, there are two alternative parsing processes, one called hard parsing and one called soft parsing. A hard parsing requires many steps, such as parsing, making the execution path, optimizing the access plan,

Oracle-specific index type resolution, oracle-index resolution2.1 B-tree index (default type)The B-tree index is a common index in Oracle. When creating an index, it is the default index type. The B-tree index can be a (simple) or composite

Summary Oracle Database is a well-known leading database system on Unix hardware platforms. Oracle users and administrators are therefore familiar with the Oracle architecture on the UNIX platform and the tools and skills above it, and get the