我试图通过python从mysql数据库中获取数据,我想打印它,但它什么也没给我。我的代码如下
import time
import datetime
import calendar
import mysql.connector
cnx = mysql.connector.connect(user='xxxx', password='xxxx',
database='robbinDatabase')
cursor = cnx.cursor()
tableData = cursor.execute('select * from robtable')
data = cursor.fetchall()
print 'data: ', data
上面的代码工作得很好,但我不想从表中获取所有数据。我试图在特定的时间范围内提取,所以我尝试这样
cnx = mysql.connector.connect(user='xxxx', password='xxxx',
database='robbinDatabase')
cursor = cnx.cursor()
rowsdata = cursor.execute("SELECT * FROM robtable WHERE usec BETWEEN UNIX_TIMESTAMP('2016-02-25') AND UNIX_TIMESTAMP('2016-02-26 23:59:59')")
# rowsdata = cursor.execute('SELECT * FROM robtable WHERE usec BETWEEN UNIX_TIMESTAMP(1456411800000000) AND UNIX_TIMESTAMP(1456416000000000)')
# rowsdata = cursor.execute('SELECT * FROM robtable WHERE `robin.col1.data` BETWEEN FROM_UNIXTIME(1456411800) AND FROM_UNIXTIME(145642200)')
data = cursor.fetchall()
print data
,结果是
data: []
它什么也没归我。
我的表中有关usec列和另外两列的数据如下所示
usec robin.col1.data robin.col2.data
1456411800000000 10.90 8.02
1456412400000000 22.3 33
.
.
.
.
1469950200000000 12.22 32.43
usec是一个包含时间戳但在epoch timeformat中的列,以微秒为单位。我也尝试过其他专栏,例如robin.col1.data
如果有人帮助我,我将不胜感激。
答案 0 :(得分:1)
你应该尝试: 日期(FROM_UNIXTIME(时期) instaed of UNIX_TIMESTAMP(' 2016-02-25')
尝试在你的sql中运行: SELECT日期(FROM_UNIXTIME(UNIX_TIMESTAMP(NOW())));