CX Oracle
cx_Oracle is a Python module that enables access to Oracle Database functionality. It allows Python programs to interact with Oracle Database using an Oracle Call Interface (OCI) as the underlying technology. With cx_Oracle, you can connect to an Oracle Database, execute SQL and PL/SQL statements, and fetch results.
Key features of cx_Oracle include:
Connection Management: It allows you to create, manage, and close connections to Oracle Database.
SQL Execution: You can execute SQL statements, including queries, inserts, updates, and deletes.
Binding Variables: It supports binding variables, which allows you to pass parameters to SQL statements efficiently.
Fetching Data: You can fetch the results of SQL queries and work with the returned data.
Transaction Management: It provides transaction handling capabilities to maintain data integrity.
PL/SQL Support:
cx_Oracleallows you to execute stored procedures and functions written in PL/SQL.Native Datatypes: It offers support for Oracle’s native data types, allowing you to work with complex data structures.
To use cx_Oracle, you need to have Oracle’s Instant Client installed on your system, which provides the necessary libraries for cx_Oracle to connect to Oracle Database. Additionally, you can install cx_Oracle via Python’s package manager, such as pip.
Here’s a basic example of how you can use cx_Oracle to connect to an Oracle Database and execute a simple query:
import cx_Oracle
# Replace these with your actual database credentials
username = “your_username”
password = “your_password”
dsn = “your_oracle_dsn”
# Establish a connection to the Oracle Database
connection = cx_Oracle.connect(username, password, dsn)
try:
# Create a cursor to execute SQL statements
cursor = connection.cursor()
# Execute a simple query
cursor.execute(“SELECT column1, column2 FROM your_table”)
# Fetch all rows from the result set
rows = cursor.fetchall()
for row in rows:
print(row)
finally:
# Close the cursor and connection
cursor.close()
connection.close()
Make sure to replace your_username, your_password, your_oracle_dsn, and your_table with the appropriate values for your Oracle Database.
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