Conn usage in oracle

CONN is a connection object in Oracle, used to establish and manage connections with the database. It provides a set of methods and properties that enable applications to access and operate the database. Its usage includes: Create a CONN object Open a connection Execute a query or operation Close the connection

CONN usage in Oracle

What is CONN ?

CONN is a connection object in Oracle that is used to establish and manage connections to the database. It provides a set of methods and properties that enable applications to access and manipulate the database.

Usage of CONN

To use CONN, you need to perform the following steps:

1. Create CONN object:Use connect The function creates a new CONN object.
2. Open the connection: Use the open method to open the connection to the database.
3. Execute queries or operations: Use various methods of the CONN object to execute SQL queries or perform DDL and DML operations.
4. Close the connection: Use the close method to close the connection to the database.

Example

The following is an example of using the CONN object to establish a connection and execute a query:

<code>import cx_Oracle

# 创建 CONN 对象
conn = cx_Oracle.connect("username", "password", "host:port/database")

# 打开连接
conn.open()

# 执行查询
cursor = conn.cursor()
cursor.execute("SELECT * FROM employees")

# 提取结果
results = cursor.fetchall()

# 关闭连接
conn.close()</code>

Other usage

CONN objects can also be used to:

• Set session variables and properties
• Control transactions
• Get database metadata
• Handling exceptions

By using CONN objects, applications can effectively interact with the Oracle database and perform various operations.

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