在Python裏操做sqlite

時間 2019-11-07

標籤 python sqlite 欄目 Python 简体版

原文原文鏈接

引入sqlite3模塊，鏈接數據庫，並建立遊標。python

>>> import sqlite3
>>> conn=sqlite3.connect (r'd:\python\actress')
>>> cur=conn.cursor()

建立一個演員表sql

>>> cur.execute ('''create table Actress(
	ID INTEGER PRIMARY KEY AUTOINCREMENT,
	Name varchar(10) NOT NULL,
	Age INTEGER NOT NULL)''')
<sqlite3.Cursor object at 0x000001BA54CA6570>

ID是integer 主鍵，且是自增的。數據庫

>>> cur.execute('''insert into Actress values
	(NULL,'王菲',47),
	(NULL,'柳巖',36),
	(NULL,'范冰冰',37)''')
<sqlite3.Cursor object at 0x000001BA54CA6570>

一次插入三個記錄。fetch

>>> cur.execute("select * from Actress")
<sqlite3.Cursor object at 0x000001BA54CA6570>
>>> cur.fetchall()
[(1, '王菲', 47), (2, '柳巖', 36), (3, '范冰冰', 37)]
>>> conn.commit ()

達到目的，並提交修改。code

練習一下刪除操做sqlite

>>> cur.execute ("delete from Actress where Name='王菲'")
<sqlite3.Cursor object at 0x000001BA54CA6570>
>>> cur.execute("select * from Actress")
<sqlite3.Cursor object at 0x000001BA54CA6570>
>>> cur.fetchall()
[(2, '柳巖', 36), (3, '范冰冰', 37)]
>>> conn.commit()

再增長一條記錄it

>>> cur.execute("insert into Actress values(NULL,'趙薇',41)")
<sqlite3.Cursor object at 0x000001BA54CA6570>
>>> conn.commit()
>>> cur.execute("select * from Actress")
<sqlite3.Cursor object at 0x000001BA54CA6570>
>>> cur.fetchall()
[(2, '柳巖', 36), (3, '范冰冰', 37), (4, '趙薇', 41)]

關閉鏈接，遊標也會自動關閉。table