python在操作數(shù)據(jù)庫(kù)執(zhí)行sql的時(shí)候我們經(jīng)常會(huì)遇到傳參問(wèn)題，以下是我總結(jié)的幾種方法：

1、格式化字符串

city = 'beijing'

cur.execute(“SELECT * FROM %s WHERE city = %s”, city)

2、使用字典傳遞

sql = “INSERT INTO user VALUES(%(username)s, %(password)s, %(email)s)”

value = {“username”:zhangsan,“password”:123456,“email”:123456@ouvps.com}

cur.execute(sql, value)

3、傳遞參數(shù)+參數(shù)名稱(chēng)：利用‘三引號(hào)’實(shí)現(xiàn)復(fù)雜SQL的換行，然后對(duì)參數(shù)進(jìn)行拼接，如下樣例中的time，根據(jù)自己的情況而定

def sql_func(time):

time = "'" + time + "'"

fail_sql='''

SELECT substr(s_start_time,1,10) "日期",count(*) "失敗數(shù)量"

FROM T_SG_WS_EXE_LOG L

WHERE 1 = 1

AND (S_WS_METHOD = 'NotifyOrderStatus' OR (S_WS_METHOD = 'placeOrder' AND S_IS_OK = 'false'))

and s_request_str not like '%"deployStatus":"2120"%' and s_request_str not like '%"deployStatus":"0"%'

and substr(s_start_time,1,10) = '''+time +'''group by substr(s_start_time,1,10)

'''

# 使用cursor進(jìn)行各種操作

y=cr.execute(fail_sql)

result = y.fetchall()

return result

參考文檔：https://www.cnblogs.com/goodhacker/p/3257882.html

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