以下是Oracle数据库的一些常见操作命令的示例 , 并对每个命令进行了详细解释:
- CREATE DATABASE:创建一个新的数据库 。
- CREATE TABLE:创建一个新的数据库表 。
- ALTER TABLE:修改数据库表的结构 。
- DROP TABLE:删除数据库表 。
- INSERT INTO:向数据库表中插入新的数据 。
- UPDATE:更新数据库表中的数据 。
DELETE FROM:从数据库表中删除数据 。
- 示例:DELETE FROM employees WHERE id = 1;
- 示例:SELECT * FROM employees;
- 示例:CREATE INDEX idx_name ON employees (name);
- 示例:DROP INDEX idx_name;
- 示例:GRANT SELECT, INSERT ON employees TO user;
- 示例:REVOKE SELECT, INSERT ON employees FROM user;
- 示例:COMMIT;
- 示例:ROLLBACK;
- 示例:SAVEPOINT sp1;
- 示例:CREATE VIEW emp_view AS SELECT * FROM employees;
- 示例:DROP VIEW emp_view;
- 示例:CREATE TRIGGER trg_employee_update BEFORE UPDATE ON employees FOR EACH ROW BEGIN ... END;
- 示例:DROP TRIGGER trg_employee_update;
- 示例:CREATE PROCEDURE get_employee(id NUMBER) AS BEGIN ... END;
- 示例:DROP PROCEDURE get_employee;
- 示例:CREATE USER new_user IDENTIFIED BY password;
- 示例:ALTER USER new_user QUOTA 100M ON users;
- 示例:DROP USER new_user;
- 示例:CREATE ROLE manager;
- 示例:GRANT manager TO user;
- 示例:REVOKE manager FROM user;
- 示例:CREATE SYNONYM emp FOR employees;
- 示例:DROP SYNONYM emp;
- 示例:SHOW TABLES;
- 示例:DESC employees;
- 示例:SET AUTOCOMMIT ON;
- 示例:SET TRANSACTION ISOLATION LEVEL READ COMMITTED;
- 示例:ALTER SESSION SET NLS_DATE_FORMAT = 'DD-MON-YYYY';
- 示例:EXIT;
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