Oracle 常用语句大全，速速收藏

Oracle数据库是世界上最流行的关系型数据库管理系统之一，以下是一些常用的Oracle SQL语句：

1. 创建用户:

CREATE USER username IDENTIFIED BY password;

2. 给用户授权:

GRANT CONNECT, RESOURCE TO username;

3. 创建表:

CREATE TABLE tablename (
    column1 datatype,
    column2 datatype,
    ...
);

4. 插入数据:

INSERT INTO tablename (column1, column2, ...) VALUES (value1, value2, ...);

5. 查询数据:

SELECT column1, column2 FROM tablename WHERE condition;

6. 更新数据:

UPDATE tablename SET column1 = value1, column2 = value2 WHERE condition;

7. 删除数据:

DELETE FROM tablename WHERE condition;

8. 创建索引:

CREATE INDEX indexname ON tablename (column1);

9. 创建视图:

CREATE VIEW viewname AS SELECT column1, column2 FROM tablename WHERE condition;

10. 创建存储过程:

CREATE PROCEDURE procedurename
IS
BEGIN
    -- PL/SQL statements here
END;

11. 创建触发器:

CREATE TRIGGER triggername
BEFORE INSERT ON tablename FOR EACH ROW
BEGIN
    -- PL/SQL statements here
END;

12. 创建序列:

CREATE SEQUENCE sequencename START WITH 1 INCREMENT BY 1;

13. 创建同义词:

CREATE SYNONYM synonymname FOR tablename;

14. 导出数据:

EXP username/password@SID FILE=export.dmp LOG=export.log

15. 导入数据:

IMP username/password@SID FILE=import.dmp LOG=import.log FULL=YES

16. 查看表结构:

DESC tablename;

17. 查看所有表:

SELECT table_name FROM user_tables;

18. 查看表空间:

SELECT * FROM dba_data_files;

19. 查看用户权限:

SELECT * FROM dba_sys_privs WHERE grantee = 'USERNAME';

20. 设置表空间配额:

ALTER USER username QUOTA UNLIMITED ON tablespace_name;

这些是Oracle数据库中最常用的SQL语句，每个语句都有其特定的用途和语法要求。在使用时，需要根据实际需求进行调整和使用。