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2024年4月16日发(作者：xml文件如何去读)

oracle数据库的sql语句

## English Answer:

1. Introduction.

Oracle Database is a relational database management

system (RDBMS) developed and marketed by Oracle Corporation.

It is one of the most popular RDBMSs in the world, known

for its scalability, performance, and reliability.

2. SQL Statements.

Structured Query Language (SQL) is a standardized

language used to access and manipulate data in a relational

database. Oracle Database supports a wide range of SQL

statements, including:

Data Definition Language (DDL) statements: Used to

create, modify, and drop database objects such as tables,

views, and indexes.

Data Manipulation Language (DML) statements: Used to

insert, update, delete, and retrieve data from tables.

Data Control Language (DCL) statements: Used to grant

and revoke access privileges to database objects.

Transaction Control Language (TCL) statements: Used to

manage transactions, which are logical units of work that

ensure data integrity.

3. Example SQL Statements.

Here are some common examples of SQL statements:

CREATE TABLE: Creates a new table.

INSERT INTO: Inserts new rows into a table.

UPDATE: Updates existing rows in a table.

DELETE: Deletes rows from a table.


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