Unknown Column exception in Mysql 1054 - mysql

Question

I tried all possible means. I included backQuotes for the string as suggested some in stack but nothing worked. It repeats the error as usual.
I also tried some queries that worked in other python files still it shows the same. I also tried queries with string without hyphens even it didn't work. I cant find out whats the problem here.
import MySQLdb
import sys
from PyQt4 import QtCore, QtGui, uic
qtCreatorFile = "Studisplay.ui" # Enter file here.
Ui_MainWindow1, QtBaseClass = uic.loadUiType(qtCreatorFile)
class stuDisplay(QtGui.QMainWindow, Ui_MainWindow1,QtGui.QTableWidget):
def __init__(self,ID):
#super(stuDisplay, self).__init__(parent)
QtGui.QMainWindow.__init__(self)
Ui_MainWindow1.__init__(self)
QtGui.QWidget.__init__(self)
self.setupUi(self)
obj = MySQLdb.connect("localhost", "root", "1234567", "python")
#The value of ID here is 14-VEC-244 I also tried `14-VEC-244` but did not work
sql = 'SELECT MEMname FROM Borrowed WHERE MemberID ='+ str(ID)
cursor = obj.cursor()
cursor.execute(sql)
name=cursor.fetchone()
print name
I get this error:
Traceback (most recent call last): File
"/home/gautham/PycharmProjects/LIBALERT/Login.py", line 105, in
pushButton_clicked
self.call = StuSecond.stuDisplay(StuID) File "/home/gautham/PycharmProjects/LIBALERT/StuSecond.py", line 22, in
init
cursor.execute(sql) File "/usr/lib/python2.7/dist-packages/MySQLdb/cursors.py", line 226, in
execute
self.errorhandler(self, exc, value) File "/usr/lib/python2.7/dist-packages/MySQLdb/connections.py", line 36, in
defaulterrorhandler
raise errorvalue
_mysql_exceptions.OperationalError: (1054, "Unknown column 'VEC' in 'where clause'")

Answer 1

You're passing a string into your WHERE clause, so it must be quoted within the query string that gets passed to the database, something like so:
sql = "SELECT MEMname FROM Borrowed WHERE MemberID = '" + str(ID) + "'"
so that the finished string looks like
sql = "SELECT MEMname FROM Borrowed WHERE MemberID = '14-VEC-244'"
(Note that the single quotes are "forward" quotes, not backticks.)
This would also be an excellent application for a prepared statement; unfortunately I am not familiar with pyqt and so cannot advise you there.