从SQL结果中获取数据

Question

有人可以帮我理解如何选择显示在SQL RESULT中的字段值吗？我想用这个值来运行一个新的不同的查询。

我使用Python来连接html，apache和sql server来创建一个将运行SQL查询并显示结果的网站。一旦我得到结果，我想在新的SQL查询中使用一列的值。有没有办法做到这一点，而不是手动输入表单中的值？

代码1：下面的代码执行数据库调用，显示基于sql查询的结果。

# prepare a cursor object using cursor() method 
cursor = db1.cursor() 

SQLQuery = ("SELECT I.OpinionID, 
        I.TimeStamp, 
        I.Strategy, 
        I.ExpectedTradingPrice, 
        I.ExpectedDate, 
        I.CPAMAnalyst, 
        I.Conviction, 
        I.Status, 
        N.DebtTicker, 
        N.InstrumentType, 
        N.ExpectedMaturity, 
        N.OrderSize, 
        N.Allocation 
       From [CpamTestAugustTestSteve].[dbo].[NewIssueOpinion] I 
       INNER JOIN [CpamTestAugustTestSteve].[dbo].[NewIssue] N ON I.NewIssueID = N.NewIssueID 
       WHERE N.ExpectedIssueDate >= GetDate()-30 
        AND I.Status = 'Suggested' AND I.Active = 1;") 

#Execute the SQL command 
cursor.execute(SQLQuery) 


#Fetch all the rows in a list of lists. 
results=cursor.fetchall() 
y = len(results) 


print "<br> <br>" 
print "<body2>" 
print """<form action="http://localhost/NewIssueStatusUpdate.py" method="post"> 
      <div> <input type="Submit" class= "submitbutton" value="Submit" /> </div> <br> <br> 
</form>""" 
if not cursor.rowcount: 
    print "<b> <mark> NO RECORDS FOUND!!</mark> </b>" 
else: 
    print "<TABLE>" 
    print "<tablebody>" 
    print"<tr>" 
    print "<tr><th>S.No</th><th>OpinionID</th> <th>TimeStamp</th> <th>Strategy</th> <th>ExpectedTradingPrice</th> <th>ExpectedDate</th> <th>CPAMAnalyst</th> <th>Conviction</th> <th>Status</th> <th>DebtTicker</th> <th>InstrumentType</th> <th>ExpectedMaturity</th> <th>OrderSize</th> <th>Allocation</th><th>New Status</th>" 
    for p in range(y): 
     print "<tr><td>%s</td>" %(p+1) 
     for q in range(len(results[p])): 
      r= results[p][q] 
      print "<td> %s </td>" % (r) 
    print "<td><select id='statusSelect' onchange='myChangeHandler(this)'><option value='Suggested'>Select</option><option value='accept'>Accept</option><option value='reject'>Reject</option><option value='terminated'>Terminated</option></select></td>" 
    print "</TABLE>" 
    from tabulate import tabulate 

我在上面的“新状态”中，我们可以选择我们要分配给记录的新状态的结果添加自定义列。

我想编写一个可用于更新数据库的代码。查询是：

"UPDATE NewIssueOpinion " & _ 
"SET Status = '" & Status & "' " & _ #Getting Status using getformvalue. 
"WHERE OpinionID = " & OpinionID & ";"  #How can we select the Opinion ID value from the result displayed from code1. 

更新的代码：

# prepare a cursor object using cursor() method 
cursor = db1.cursor() 

SQLQuery = ("SELECT I.OpinionID, 
        I.TimeStamp, 
        I.Strategy, 
        I.ExpectedTradingPrice, 
        I.ExpectedDate, 
        I.CPAMAnalyst, 
        I.Conviction, 
        I.Status, 
        N.DebtTicker, 
        N.InstrumentType, 
        N.ExpectedMaturity, 
        N.OrderSize, 
        N.Allocation 
       From [CpamTestAugustTestSteve].[dbo].[NewIssueOpinion] I 
       INNER JOIN [CpamTestAugustTestSteve].[dbo].[NewIssue] N ON I.NewIssueID = N.NewIssueID 
       WHERE N.ExpectedIssueDate >= GetDate()-30 
        AND I.Status = 'Suggested' AND I.Active = 1;") 

#Execute the SQL command 
cursor.execute(SQLQuery) 


#Fetch all the rows in a list of lists. 
results=cursor.fetchall() 
y = len(results) 
#define function 
def Review(): 
    cursor.close() 
    cursor = db1.cursor() 
    for result in results: 
     my_OpinionID = result[1] 
     my_StatusID = result[14] 
     cursor.execute('UPDATE [CpamTestAugustTestSteve].[dbo].[NewIssueOpinion] SET Status = ? WHERE OpinionID = ?', (my_StatusID, my_OpinionID)) 
     db1.commit() 
     cursor.close() 
     db1.close()  
location.reload() 
print "<br> <br>" 
print "<body2>" 
print "<form method='post' onclick='return Review();'>" 
print "<div> <input type='Submit' class= 'submitbutton' value='Submit' /> </div> <br> <br>" 
print "</form>" 
if not cursor.rowcount: 
    print "<b> <mark> NO RECORDS FOUND!!</mark> </b>" 
else: 
    print "<TABLE>" 
    print "<tablebody>" 
    print"<tr>" 
    print "<tr><th>S.No</th><th>OpinionID</th> <th>TimeStamp</th> <th>Strategy</th> <th>ExpectedTradingPrice</th> <th>ExpectedDate</th> <th>CPAMAnalyst</th> <th>Conviction</th> <th>Status</th> <th>DebtTicker</th> <th>InstrumentType</th> <th>ExpectedMaturity</th> <th>OrderSize</th> <th>Allocation</th><th>New Status</th>" 
    for p in range(y): 
     print "<tr><td>%s</td>" %(p+1) 
     for q in range(len(results[p])): 
      r= results[p][q] 
      print "<td> %s </td>" % (r) 
    print "<td><select id='statusSelect'><option value='Suggested'>Select</option><option value='Accepted'>Accept</option><option value='rejected'>Reject</option><option value='terminated'>Terminated</option></select></td>" 
    print "</TABLE>" 
    from tabulate import tabulate      
print "</body2>" 


db1.commit() 

当我点击提交按钮的页面重新加载，但数据库未更新。不知道出了什么问题！

Answer 1

2点这里：

cur.fetchall返回元组的元组。 results[0][0]将针对您的数据中由查询返回的第一行的OpinionID。 results[1][0]将是OpinionID第二等results [0][7]将是第一行状态等

DO使用Python的字符串连接没有建立查询。使用安全的方法。

my_first_OpinionID = results[0][0] 
my_first_statusID = results[0][7] 
cur.execute("UPDATE NewIssueOpinion SET Status = ? WHERE OpinonID = ?", (my_first_OpinionID, my_first_statusID)) 

您可能会发现这些链接有用：

<http://zetcode.com/db/mysqlpython/> 
<http://bobby-tables.com/python> 
<http://sebastianraschka.com/Articles/2014_sqlite_in_python_tutorial.html> 

Answer 2

的结果cursor.execute（的SQLQuery，多=真）： 如果result.with_rows：

相同在这里，上次我试图连接到分贝和打印结果我使用