SQL文件中的bash脚本变量

Question

I want to read a barcode with a scanner and save the code in a MySQL Database. The Barcode Scanner is connected to a Raspberry Pi and works like a keyboard. I have written two files: A Bash script to read the data from the code (input) and connect to the database (Login.sh) and also a SQL file to insert the data in the database (insert.sql)

The database connection, read of the input and insert in the database works sucessful. Can i save the input in a variable and use it in the SQL file?

Login.sh:

read code;
mysql -p host=10.0.8.3 --user=root --password=secret databasename < insert.sql

insert.sql:

INSERT INTO data (id) VALUES ('$code')

Thank you so much for any answer

Answer 1

Why not just go

read code;
echo "INSERT INTO data (id) VALUES ('$code')" | mysql -p host=192.168.1.2 --user=root --password=secret databasename

If you really want to use $code in the insert script, you should

export code

in the login script after read code . But that will make $code available globally in the current shell - probably not a good idea.

Cheers,