Microsoft Access 2007/2010 Runtime Mode Database Format
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Files with the .ACCDR extension contain read-only relational databases for Microsoft Access. They are equivalent to ACCDB files, but do not allow you to edit the data.

For Microsoft Access to run an ACCDB database in read-only mode, just change the file extension to ACCDR. In order to be able to make changes in such a database, it is necessary to change the extension back to ACCDR.

Windows

.abs Absolute Database Single-file Database Format
.accdb Microsoft Access 2007/2010 Database Format
.accdc Microsoft Access 2007/2010 Digitally Signed Database Format
.accde Microsoft Access 2007/2010 Compiled Execute Only Format
.accdr Microsoft Access 2007/2010 Runtime Mode Database Format
.accdt Microsoft Access 2007/2010 Database Template Format
.accdw Microsoft Access Link Format
.accft Microsoft Access Template Format

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