We have found one software suitable in our database for this conversion.
Considering there is literally dozens various database formats that share db extension, there exist many possible db to xlsm conversions, which can be almost any database to Excel conversions.
Many databases (.db) can be exported as Excel macro-enabled spreadsheets (.xlsm) mainly for reporting purposes or so you can quickly review some data or use them in presentations.
You can usually find a dedicated Excel export in many database management programs, but even some spreadsheet programs may offer limited support for some database formats.
DB
Files with db file extension are generally databases. One of the database formats that uses the db file extension is created by Corel Paradox.
XLSM
Files with xlsm extension are used for workbooks of spreadsheets created in Microsoft Excel that also include macros, that enhance the functionality of the spreadsheet but some automation features. Other spreadsheets might open xlsm files as well, however they most likely wont be able to use the Excel specific formatting and macros.