Question

我正在尝试连续更新多个项目，我的代码如下：

updateQuery = "UPDATE Throughput SET Test_Date = '%s' ,  Iperf11ntcpUL = '%s' , Iperf11ntcpDL = '%s' , Iperf11nudpUL = '%s' , Iperf11nudpDL = '%s' , HttpDL = '%s' , HttpUL = '%s', notes2='%s' where DeviceName = '%s' and Buildinfo ='%s' and Band = '%s' and Buildtype = '%s' " %(date, data['Iperf 11N TCP UL'], data['Iperf 11N TCP DL'], data['Iperf 11N UDP UL'], data['Iperf 11N UDP DL'], data['HTTP DL'],data['HTTP UL'],data['Notes'], data['Device Name'], data['Build Info / No.'], data['Band'], data['Build Type'])

cursor.execute(updateQuery)

执行此代码时出现以下错误：

Previous SQL was not a query.

Answer 1

Parameterize更新查询：

...
update = """update Throughput
            set Test_Date = ?, Iperf11ntcpUL = ?, Iperf11ntcpDL = ?,  
                Iperf11nudpUL = ?, Iperf11nudpDL = ?, HttpDL = ?,
                HttpUL = ?, notes2 = ?
            where
                DeviceName = ? and Buildinfo = ? and
                Band = ? and Buildtype = ?;"""

parameters = [date, data['Iperf 11N TCP UL'], data['Iperf 11N TCP DL'],
              data['Iperf 11N UDP UL'], data['Iperf 11N UDP DL'],
              data['HTTP DL'], data['HTTP UL'], data['Notes'],
              data['Device Name'], data['Build Info / No.'],
              data['Band'], data['Build Type']]

cursor.execute(update, parameters)
...

Answer 2

我最终自己搞清了这个问题。

我在以下循环中执行 updateQuery ：

for row in cursor.execute(selectQuery)

相反，我抓住了行中的 id ，退出循环后，我为获取的id执行了更新语句

Answer 3

updateQuery = "UPDATE Throughput SET Test_Date = '%s' ,  Iperf11ntcpUL = '%s' , Iperf11ntcpDL = '%s' , Iperf11nudpUL = '%s' , Iperf11nudpDL = '%s' , HttpDL = '%s' , HttpUL = '%s', notes2='%s' where DeviceName = '%s' and Buildinfo ='%s' and Band = '%s' and Buildtype = '%s' " %((date, data['Iperf 11N TCP UL'], data['Iperf 11N TCP DL'], data['Iperf 11N UDP UL'], data['Iperf 11N UDP DL'], data['HTTP DL'],data['HTTP UL'],data['Notes'], data['Device Name'], data['Build Info / No.'], data['Band'], data['Build Type']))

查询中的'％'之后的所有内容（放置值的位置）都应该是一个数组。只需将这些值包装在括号中（参见上文）

pyodbc - 无法更新行中的多个项目

3 个答案: