[英]python mysql query not displaying correct result
我在这里有一个代码,它应该显示从 combobox 中选择的所有结果,例如 id = 输入框中的值。 但是当代码执行时,我得到一个空集“[]”,它跳到 if 语句,它给了我一个消息框,尽管数据库已填充并且它与我之前定义的其他 function 正确显示。 我的代码有错误还是我在这里做错了什么?
提前致谢:)
看一下代码:
def sp_patient():
#Creating window
sp_pat = Toplevel(update)
sp_pat.title('Choose Patient')
def search():
#Assigning variable to .get()
a = drops.get()
if a == 'id' or a == 'emirate_id' or a == 'email_adress' or a == 'gender' or a == 'DOB' or a == 'blood_grp' or a == 'COVID_test':
#Establishing connection
con = mysql.connect(host='', user='',
password='', database='')
# Making SQL command
sql_command = "SELECT * FROM patient_infos where %s = %s ;"
values = a , e_1.get()
c = con.cursor()
c.execute(sql_command, values)
# Executing and saving SQL command
records = c.fetchall()
print(records)
if records == []:
messagebox.showinfo('Does not exist!','Sorry such patient does not exist')
else:
#Creating window
result_win = Toplevel(sp_pat)
result_win.title('Search result')
index=0
for index,x in enumerate(records):
num=0
for y in x:
lookup_label = Label(result_win,text=y)
lookup_label.grid(row=index+1,column=num)
num += 1
#Closing connection
con.close()
#Creating column header and exit button
l_1 = Label(result_win,text='ID',font=font_text)
l_2 = Label(result_win,text='Full Name',font=font_text)
l_3 = Label(result_win,text='Phone no.',font=font_text)
l_4 = Label(result_win,text='Emirates ID',font=font_text)
l_5 = Label(result_win,text='Email addr.',font=font_text)
l_6 = Label(result_win,text='Gender',font=font_text)
l_7 = Label(result_win,text='DOB',font=font_text)
l_8 = Label(result_win,text='Nationality',font=font_text)
l_9 = Label(result_win,text='Blood group',font=font_text)
l_10 = Label(result_win,text='COVID test',font=font_text)
l_11 = Label(result_win,text='Emergency no.',font=font_text)
btn_ext = Button(result_win,text='Exit',font=font_text,command=result_win.destroy,borderwidth=2,fg='#eb4d4b')
#Placing it in screen
l_1.grid(row=0,column=0,padx=20)
l_2.grid(row=0,column=1,padx=20)
l_3.grid(row=0,column=2,padx=20)
l_4.grid(row=0,column=3,padx=20)
l_5.grid(row=0,column=4,padx=20)
l_6.grid(row=0,column=5,padx=20)
l_7.grid(row=0,column=6,padx=20)
l_8.grid(row=0,column=7,padx=20)
l_9.grid(row=0,column=8,padx=20)
l_10.grid(row=0,column=9,padx=20)
l_11.grid(row=0,column=10,padx=20)
btn_ext.grid(row=index+2,columnspan=11,ipadx=240,sticky=E+W)
您不能像这样将列名传递给查询。
您必须分两步完成:
# Making SQL command
sql_command = "SELECT * FROM patient_infos where {} = %s;"
c = con.cursor()
sql_command = sql_command.format(a)
c.execute(sql_command, (e_1.get(),))
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