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1. Unzip gateways to local Click setup to enter the welcome screen 2. Welcome Interface Click on "Installed Products" 3. Check whether the database has been installed locally Close the product installation list after confirming that database has been installed 4. Back to the Welcome Interface Click Next to enter the Transparen ...

In PL/SQL programs, cursors are often used to handle transactions with multiple rows of records. Among them, cursors are divided into explicit cursors and implicit cursors. Here, the use of explicit cursors is emphasized. Explicit Cursor Processing of Display Cursor Four PL/SQL steps: 1) Define a cursor: Define a cursor name and the corr ...

Introduction to enum (enumeration) class The java enumeration class is a set of predefined constants declared using the enum keyword. The name of the constants is officially recommended in uppercase. 1. Basic usage of enum class A common example, such as a week, can be described as an enumeration class, as follows public enum Day { ...

11g, can automatically manage sga,pga, known as amm MEMORY_MAX_TARGE: This parameter specifies the maximum value that MEMORY_TARGET can set. Memor_target specifies the available memory at the system level. It can reduce or increase the size of SGA and PGA as needed. In a text-based parameter file, if the MEMORY_MAX_TARGET parameter is exclude ...

The main content of this paper is the first time to use MYSQL database in Windows environment, including MYSQL installation, service start, database landing, database creation, view, deletion, table creation, query and deletion. Requirements for a certain basis for the database, such as already familiar with DB2 database. Environmental Scien ...

data dictionary The data dictionary is where oracle stores information about the database. Almost all system and object information can be queried in the data dictionary.The data dictionary is the information core of the oracle database system. It is a collection of tables and views that provide information about the database. These tables an ...

1. Background   * MySQL is a relational database management system developed by Swedish MySQL AB and currently owned by Oracle.MySQL is one of the most popular relational database management systems. In the application of WEB, MySQL is the best RDBMS (Relational Database Management System) application software.   * MySQL is ...

Oracle imports dump files 1. Create a logical directory. This command will not create a real directory in the operating system. It is better to create a directory by an administrator such as System. create or replace directory dpdata1 as 'd:\test\dump'; Default DATA_PUMP_DIR, in the directory C: app Administrator admin orcl dpdump\ 2. Chec ...

Chapter 1 Database Classification 1. Relational database There are many two-dimensional tables in the database, one table, two tables, three tables, one hundred tables and so on. There may be associations between multiple tables. 2. Non-relational databases Includes multiple database services (multi-instance) 3306/3307/3307. Each databas ...

I. Achieving Requirements 1. The responsibility of the data access layer is to add, delete and modify the database, so it can be very single. It only needs one inteface to do it. 2. Automated ORM is not conducive to the optimization of SQL and the customization of SQL, so TeaFrameWork ORM is ready to be implemented in a semi-automatic way. De ...