With the development of information technology and the increase in data volume, more and more enterprises and institutions are beginning to use database management systems to store and manage data. Among them, Oracle database is one of the most popular relational database management systems. This article will introduce the login method of Oracle database.
1. Use SQL*Plus to log in to Oracle
SQLPlus is a text-based interactive tool provided by Oracle. It can execute SQL statements in the Oracle database and manage the database. object. Logging in to Oracle through SQLPlus is very simple, just follow the following steps:
(1) Open the command line interface (for Windows systems, you can select "Start" → "Run", enter cmd, and press Enter Enter the command line window).
(2) Use the following command to connect to the Oracle database:
sqlplus /nolog
(3) Then, enter the following command to connect to the target database:
connect username/password@database
Among them, username is the username to log in to the database; password is the user password; database is the name of the database.
2. Use Oracle SQL Developer to log in to Oracle
In addition to SQL*Plus, Oracle also provides a GUI tool, Oracle SQL Developer. SQL Developer is a free, cross-platform database management tool that can connect to multiple databases and execute SQL statements. Logging in to Oracle through SQL Developer is also very simple, just follow the following steps:
(1) Open SQL Developer.
(2) Select "New Connection" or press the shortcut key Ctrl N to open the "New Connection" window.
(3) Fill in the necessary information in the "New Connection" window. As shown in the figure:
Among them, the connection name can be customized; the user name, password and database name need to fill in the correct information.
(4) Press the "Test" button to check whether the connection is successful.
(5) If the connection is successful, you can press the "Connect" button to log in to the Oracle database.
3. Use Oracle Enterprise Manager to log in to Oracle
Oracle Enterprise Manager is a management tool provided by Oracle, which supports access to Oracle databases from web applications and command line interfaces. Logging in to Oracle through Enterprise Manager is also very simple. You only need to follow the following steps:
(1) Open the browser and enter the following address to enter Oracle Enterprise Manager:
http://host :port/em
Where, host is the host name of the Oracle database, and port is the Oracle HTTP Server port number. If the default settings are not modified, port is usually 5500 or 1158.
(2) Enter the username and password on the login page.
(3) If the login is successful, you can manage the Oracle database in Oracle Enterprise Manager.
Summary
The above are the three methods for logging in to the Oracle database. Each method is valid and you can choose one based on your needs. In general, SQL*Plus is a powerful command line tool that can flexibly execute SQL statements; Oracle SQL Developer is a modern GUI tool that can facilitate database development and management; Oracle Enterprise Manager is a Web-based application that enables higher-level database management and monitoring. No matter which method you use, you need to make sure that the username and password are correct and that the database starts properly.
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