如何在 where 子句和变量的帮助下从表中获取记录

Question

The following fucntion is used to get all records from a sql table where the name( this is a column) is equal to temp(A variable which has been assigned)

But when I run the function it shows

mysql.connector.errors.ProgrammingError: 1054 (42S22): Unknown column 'temp' in 'where clause'

THE CODE IS:

def filter():

global temp

temp = f_dob.get()
print(temp)

my_cursor.execute("SELECT * FROM mk WHERE name = temp")

result=my_cursor.fetchall()

for row in rows:

    print(row) 

    tree.insert("", tk.END, values=row)

I am writing the code on sublime text editor and running it on git bash

Answer 1

You need to bind the temp Python variable to the query:

temp = f_dob.get()
sql = "SELECT * FROM mk WHERE name = %s"
my_cursor.execute(sql, (temp,))
result = my_cursor.fetchall()

In addition, you should be careful to open your MySQL database cursor in prepared statement mode. So, your code should look something like this:

my_cursor = conn.cursor(prepared=True)