如何使用Python从 SQLite 表中删除特定行？

在本文中，我们将讨论如何使用Python从 SQLite 表中删除特定行。

为了从 SQL 中的表中删除特定行，我们使用DELETE 查询，SQL 中的 DELETE 语句用于从表中删除现有记录。根据我们在 WHERE 子句中指定的条件，我们可以删除单个记录或多个记录。

句法：

DELETE FROM table_name

WHERE condition;

我们将创建一个表，然后在其中执行删除操作。

Python3

# importing sqlite module
import sqlite3
  
# create connection to the database 
# my_database
connection = sqlite3.connect('my_database.db')
  
# create table named address of customers 
# with 4 columns id,name age and address
connection.execute('''CREATE TABLE ship (ship_id INT, ship_name \
TEXT NOT NULL, ship_destination CHAR(50) NOT NULL); ''')
  
print("Ship table created successfully")
  
# close the connection
connection.close()

输出：

Ship table created successfully

示例 1：

用于插入数据和删除数据的Python程序，其中 2 是船的 id。

蟒蛇3

# import sqlite module database
import sqlite3
  
# create connection to the database
# my_database
connection = sqlite3.connect('my_database.db')
  
# insert query to insert values
connection.execute("INSERT INTO ship  VALUES (1, 'tata-hitachi','noida' )")
connection.execute("INSERT INTO ship  VALUES (2, 'tata-mumbai','mumbai' )")
connection.execute("INSERT INTO ship  VALUES (3, 'tata-express','hyderabad' )")
  
# query to display all data in the table
cursor = connection.execute("SELECT * from ship")
print("Actual data")
  
# display row by row
for row in cursor:
    print(row)
  
# query to delete all data where ship_id = 2
connection.execute("DELETE from ship where ship_id=2")
  
print("After  deleting ship id = 2 row")
  
# display row by row
cursor = connection.execute("SELECT * from ship")
for row in cursor:
    print(row)
  
# close the connection
connection.close()

输出：

示例 2：

在此示例中，删除同一表中船舶地址为 hyderabad 的数据。

蟒蛇3

# import sqlite module database
import sqlite3
  
# create connection to the database
# my_database
connection = sqlite3.connect('my_database.db')
  
# insert query to insert values
connection.execute("INSERT INTO ship  VALUES (1, 'tata-hitachi','noida' )")
connection.execute("INSERT INTO ship  VALUES (2, 'tata-mumbai','mumbai' )")
connection.execute("INSERT INTO ship  VALUES (3, 'tata-express','hyderabad' )")
  
# query to display all data in the table
cursor = connection.execute("SELECT * from ship")
print("Actual data")
  
# display row by row
for row in cursor:
    print(row)
  
# query to delete all data where ship_id = 2
connection.execute("DELETE from ship where ship_destination='hyderabad'")
  
print("After  deleting ship address = hyderabad row")
  
# display row by row
cursor = connection.execute("SELECT * from ship")
for row in cursor:
    print(row)
  
# close the connection
connection.close()

输出：