Oracle installation and usage

Oracle is a relational Database management system. The following is an introduction to the installation and use of Oracle Database: 1. Installation: -Download the Oracle Database installation package, and select the appropriate version according to the operating system. -Run the installation program and follow the instructions to install. Choose default or custom settings and configure as needed. -Configure database instance names, listener ports, and other information. -Create a system administrator account (usually sys) and set a password. -Complete the installation and start the database service. 2. Create a data table: -Use SQL * Plus, SQL Developer, or other visualization tools to connect to the Oracle Database. -Create a new database user and grant permission to operate the database. -Create a data table in the new user's schema. -For example, create a data table called "employees" with fields "id", "name", "age", "salary": sql CREATE TABLE employees ( id INT PRIMARY KEY, name VARCHAR(50), age INT, salary FLOAT ); 3. Data insertion: -Insert data into the data table using the Insert statement. -For example, insert a record into the 'employees' table: sql INSERT INTO employees (id, name, age, salary) VALUES (1, 'John Smith', 30, 5000); 4. Data modification: -Use the UPDATE statement to modify records in the data table. -For example, modify the salary of the record with id 1 in the "employees" table to 6000: sql UPDATE employees SET salary = 6000 WHERE id = 1; 5. Data Query: -Use the SELECT statement to query data from a data table. -For example, to query the names and salaries of all records in the "employees" table: sql SELECT name, salary FROM employees; 6. Data deletion: -Use the DELETE statement to delete records from the data table. -For example, delete the record with id 1 in the "employees" table: sql DELETE FROM employees WHERE id = 1; Through the above steps, you can install the Oracle Database and create data tables to insert, modify, query and delete data. According to specific needs, you can further learn and master other advanced functions and SQL statements.