在Python里操做sqlite

时间 2019-11-07

标签 python sqlite 栏目 Python 繁體版

原文原文链接

引入sqlite3模块，链接数据库，并建立游标。python

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

建立一个演员表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 主键，且是自增的。数据库

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

一次插入三个记录。fetch

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

达到目的，并提交修改。code

练习一下删除操做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, '柳岩', 36), (3, '范冰冰', 37)]
>>> conn.commit()

再增长一条记录it

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

关闭链接，游标也会自动关闭。table

>>> conn.close()