mysql current root password 忘了 window是系统
时间: 2023-10-25 14:39:33 浏览: 233
MySQL是一种关系型数据库管理系统,它的密码是由用户自行设置的,如果您忘记了MySQL的root密码,可以按照以下步骤重置密码:
1. 停止MySQL服务;
2. 打开命令行窗口,进入MySQL的bin目录;
3. 输入命令:mysqld --skip-grant-tables,回车后等待MySQL启动;
4. 打开新的命令行窗口,进入MySQL的bin目录;
5. 输入命令:mysql -u root,回车后进入MySQL;
6. 输入命令:use mysql;回车后切换到mysql数据库;
7. 输入命令:update user set password=password('新密码') where user='root';回车后更新密码;
8. 输入命令:flush privileges;回车后刷新权限;
9. 输入命令:exit;回车后退出MySQL;
10. 停止MySQL服务;
11. 重启MySQL服务。
在执行以上步骤时,请注意保护好您的数据安全。
相关问题
python编写一个答题系统,其中选项和题目都存储在mysql名叫shuju的数据库中的questions表中,题目名称叫做question,第一个选项名option_a,第二个option_b,第三个option_c,第四个option_d,存储正确答案的字段名是answer,他存储的是正确选项的字段名,我一共存储了三道题 要求题目在最上面,四个选项在中间, 四个选项的下面正中间放在一行的是下一题和结果按钮,首先答题过程中,选中答案,单击下一题后,出现本题是否答对的弹窗然后 就在当前窗口将mysql数据库中下一个题的题目和选项更新替换到当前窗口的题目和选项中,最后一个题目更新替换到当前窗口的时候,再点击下一题就弹出一个窗口提示是否大队并且提示这是最后一,答对一题获得10分,我点击结果按钮就弹出窗口显示你获得的分数
好的,我来解答你的问题。对于你的要求,我可以给出以下的答案:
首先,你需要安装mysql-connector-python这个库,通过以下命令安装:
```python
pip install mysql-connector-python
```
接着,你需要编写一个Python程序,实现题目和选项的显示、答案的判断和分数的计算。具体的实现步骤如下:
1. 连接mysql数据库
```python
import mysql.connector
mydb = mysql.connector.connect(
host="localhost",
user="yourusername",
password="yourpassword",
database="shuju"
)
mycursor = mydb.cursor()
```
2. 查询题目和选项
```python
mycursor.execute("SELECT question, option_a, option_b, option_c, option_d, answer FROM questions")
result = mycursor.fetchall() # 获取所有题目和选项
```
3. 显示题目和选项
```python
import tkinter
def show_question():
question_label.config(text=result[current_question][0])
option_a.config(text=result[current_question][1])
option_b.config(text=result[current_question][2])
option_c.config(text=result[current_question][3])
option_d.config(text=result[current_question][4])
```
4. 判断答案是否正确
```python
def check_answer(answer):
if result[current_question][5] == answer:
return True
else:
return False
```
5. 计算分数
```python
score = 0
def add_score():
global score
score += 10
score_label.config(text="Score: {}".format(score))
```
6. 显示结果
```python
def show_result():
result_window = tkinter.Toplevel()
result_text = "Your score is {}".format(score)
result_label = tkinter.Label(result_window, text=result_text)
result_label.pack()
```
7. 完整代码
```python
import mysql.connector
import tkinter
mydb = mysql.connector.connect(
host="localhost",
user="yourusername",
password="yourpassword",
database="shuju"
)
mycursor = mydb.cursor()
mycursor.execute("SELECT question, option_a, option_b, option_c, option_d, answer FROM questions")
result = mycursor.fetchall()
current_question = 0
score = 0
def show_question():
question_label.config(text=result[current_question][0])
option_a.config(text=result[current_question][1])
option_b.config(text=result[current_question][2])
option_c.config(text=result[current_question][3])
option_d.config(text=result[current_question][4])
def check_answer(answer):
if result[current_question][5] == answer:
return True
else:
return False
def add_score():
global score
score += 10
score_label.config(text="Score: {}".format(score))
def show_result():
result_window = tkinter.Toplevel()
result_text = "Your score is {}".format(score)
result_label = tkinter.Label(result_window, text=result_text)
result_label.pack()
def next_question():
global current_question
if current_question == len(result)-1: # 最后一题
if check_answer(answer.get()): # 答对
add_score()
show_result()
return
if check_answer(answer.get()): # 答对
add_score()
current_question += 1
show_question()
root = tkinter.Tk()
question_label = tkinter.Label(root, text="")
question_label.pack()
answer = tkinter.StringVar()
option_a = tkinter.Radiobutton(root, text="", variable=answer, value="option_a")
option_b = tkinter.Radiobutton(root, text="", variable=answer, value="option_b")
option_c = tkinter.Radiobutton(root, text="", variable=answer, value="option_c")
option_d = tkinter.Radiobutton(root, text="", variable=answer, value="option_d")
option_a.pack()
option_b.pack()
option_c.pack()
option_d.pack()
next_button = tkinter.Button(root, text="Next", command=next_question)
next_button.pack()
score_label = tkinter.Label(root, text="Score: 0")
score_label.pack()
result_button = tkinter.Button(root, text="Result", command=show_result)
result_button.pack()
show_question()
root.mainloop()
```
希望这个答案能够帮到你!
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