China DOS Union

How to introduce the system date as the generated file name in a batch file?

I back up the MySQL database every day, typing the DOS command:
mysqldump -uroot -proot -B qyzx > c:\qyzx_mysql.sql
Then manually change the file name to a file name with the current date, such as: qyzx_mysql_20061128.sql

How to get the current system date in the batch file name and automatically add it to the command?
Further, is there a way to perform relative date calculations like getting yesterday, the day before yesterday, tomorrow, the day after tomorrow, etc.?
In addition, what syntax does the batch processing command belong to? What type of book should I read? I want to learn.
I am a beginner, I can hardly write batch processing, I can only simply fill the Dos command into the bat file.
Please give instructions from the experts, thank you! ~~~~~~~~~~

mysqldump -uroot -proot -B qyzx > c:\qyzx_mysql_%date::=-%.sql

Thanks, but it didn't succeed. It seems there's something wrong somewhere........

Microsoft Windows 2000 [Version 5.00.2195]
(C) Copyright 1985-2000 Microsoft Corp.

D:\>mysqldump -uroot -proot -B qyzx > c:\qyzx_mysql_%date::=-%.sql
mysqldump: Got error: 1102: Incorrect database name '2006-11-30.sql' when select
ing the database

D:\>myrun1

D:\>mysqldump -uroot -proot -B qyzx 2006-11-30.sql 1>c:\qyzx_mysql_星期四
mysqldump: Got error: 1102: Incorrect database name '2006-11-30.sql' when select
ing the database

D:\>

The generated file is qyzx_mysql_Thursday with no extension.

I added a pair of double quotes and changed it to
mysqldump -uroot -proot -B qyzx > "c:\qyzx_mysql_%date::=-%.sql"
The obtained backup file name is:
qyzx_mysql_Thursday 2006-11-30.sql
It's basically okay, thank you!!! But is there a better way,
Remove the Chinese character "Thursday" and the subsequent spaces and even the horizontal lines between the dates?
That is, according to the date format of 20061130? Thank you

Because I want the generated file name to be more standard, which can be directly typed on the command line,
File names with Chinese characters and spaces are not very good, thank you

[ Last edited by rocketer on 2006-11-30 at 04:34 PM ]

```
for /f "tokens=1-4 delims=:-" %%i in ("%date:~0,10%") do set DT=%%i%%j%%k
set DT=%DT: =0%
mysqldump -uroot -proot -B qyzx > c:\qyzx_mysql_%DT%.sql
```

But I tried it, and the result is
qyzx_mysql_星期四020061.sql
It seems to be a small place that's different? ? ?
Please let the expert continue to take a look? ? ?
You can replace mysqldump -uroot -proot -B qyzx
with a dir
to see if the generated file name is what is expected, thank you,
I really don't understand, learning slowly

I'm sorry, our time formats are different. Change ("%date:~0,10%") to ("%date:~0,13%") and try again

This time it's
qyzx_mysql_Thursday02006113.sql
If the zero after Thursday runs to the end, it will be correct.
Oh? So there are problems with different time formats? How do I know the time format?
Is there still a possibility of chaos when running on another machine after finally getting it right?
Also, the Chinese characters can't be eliminated??????
Thanks

Win2000 test passed:

for /f "tokens=1-4 delims=:-" %%i in ("%date:~0,14%") do set DT=%%i%%j%%k%%l

set DT=%DT: =%

mysqldump -uroot -proot -B qyzx > qyzx_mysql_%DT%.sql

It worked.
qyzx_mysql_Thursday20061130.sql
Thank you!!!
That week seems relatively difficult to eliminate, but it's already very good now. Thanks again!!!
I don't understand it now, I'll learn it slowly.

To remove the day of the week, change the code to:

for /f "tokens=1-4 delims=:-" %%i in ("%date:~3,14%") do set DT=%%i%%j%%k%%l

set DT=%DT: =%

mysqldump -uroot -proot -B qyzx > qyzx_mysql_%DT%.sql

You can analyze how to achieve it according to the differences between the two codes, and then you will understand.

Thank you so much!!! I have bookmarked this post and thank you again!!!

xp sp2

set name=%date:~0,-4%

mysqldump -uroot -proot -B qyzx > qyzx_mysql_%name:-=%.sql 

Can be implemented with a software. I have it here. If you need it, add my QQ 403188070 and I'll send it to you