python3 sqlite3限制條件查詢的操作
請註意10,11,24行的代碼,是本條博客的精華,邏輯並不難,就是有些小語法問題比較糾結,記錄一下。
import json import sqlite3 import re import argparse def Get(db_file): conn = sqlite3.connect(db_file) cur = conn.cursor() print("5555555") value1=(60)# this is must be () cur.execute("select * from exception where AGV_ID=(%s)" %(value1)) #cursor.execute("insert into exception values('%s', '%s','%s' ) " %(start_time ,ID ,infomation)) result= cur.fetchall() print("result:",result) for i in result: print(i) print("******************************888") def get_agv_id(db_file): try: conn = sqlite3.connect(db_file) cur = conn.cursor() cur.execute("select * from exception where AGV_ID=51") #print( cur.fetchall()) result= cur.fetchall() for i in result: print(i) except sqlite3.Error,e: print(e) if __name__ == '__main__': parser = argparse.ArgumentParser(description='check the information of db') #parser.add_argument('-h', '--help', help='Statistics for abnormal information') parser.add_argument('-n', '--name', help=' the db of name ') args = vars(parser.parse_args()) db_name = args['name'] print("db_name:",db_name) conn = sqlite3.connect('db_name') cursor = conn.cursor() Get('fitkits.db') get_agv_id('fitkits.db') conn.commit() conn.close() print('DONE!') print("666")
補充:python + sqlite3 基本操作
連接數據庫
import sqlite3 # 連接數據庫(如果不存在則創建) conn = sqlite3.connect('test.db') print("Opened database successfully") # 創建遊標 cursor = conn.cursor() ... # 關閉遊標 cursor.close() # 提交事物 conn.commit() # 關閉連接 conn.close()
創建表
... # 創建遊標 cursor = conn.cursor() # 創建表 sql = 'CREATE TABLE Student(id integer PRIMARY KEY autoincrement, Name varchar(30), Age integer)' cursor.execute(sql) # 提交事物 conn.commit() ...
插入數據
... # 創建遊標 cursor = conn.cursor() # 插入數據 sql = "INSERT INTO Student(Name, Age) VALUES(\'love\', 22)" cursor.execute(sql) # 插入數據 2 data = ('love2', 2221) # or ['love2', 2221] sql = "INSERT INTO Student(Name, Age) VALUES(?, ?)" cursor.execute(sql, data) # 提交事物 conn.commit() ...
查詢數據
... # 創建遊標 cursor = conn.cursor() # 查詢數據 sql = "select * from Student" values = cursor.execute(sql) for i in values: print(i) # 查詢數據 2 sql = "select * from Student where id=?" values = cursor.execute(sql, (1,)) for i in values: print('id:', i[0]) print('name:', i[1]) print('age:', i[2]) # 提交事物 conn.commit() ...
其他操作
自增字段起始位置
# 設置起始值為1 update sqlite_sequence SET seq = 0 where name = '表名'; # 設置全部表起始值為默認值 delete from sqlite_sequence where name='TableName'; --註意表名區分大小寫
以上為個人經驗,希望能給大傢一個參考,也希望大傢多多支持WalkonNet。如有錯誤或未考慮完全的地方,望不吝賜教。
推薦閱讀:
- None Found