錯誤訊息

pymysql.err.ProgrammingError: 
(1064, "You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ''Beitun_District'' at line 1")

app檔

def Select():
    if request.method == 'GET': 
        session.clear()
        form = m.SelectForm() 
        return render_template('index.html', form=form)
    else:
        form = m.SelectForm(request.form) 
        if request.method =='POST' and form.validate():       
            add = request.form['add'] 
            agg = request.form['agg']                          
            detail= m.sql_read(add) 

module檔

def sql_read(add):  
    connection = pymysql.connect(host='********',
                                 port=3307,
                                 user='root',
                                 password='*****',
                                 database='taichung',
                                 charset='utf8mb4')  
    with connection:
        with connection.cursor() as cursor:
            sql = "SELECT * FROM  %s "        
            cursor.execute(sql,add)                     
            rows=cursor.fetchall()        
        connection.commit()