diff --git a/desktopData/src/main/kotlin/com/intelligentbackpack/desktopdata/db/DesktopDAO.kt b/desktopData/src/main/kotlin/com/intelligentbackpack/desktopdata/db/DesktopDAO.kt
new file mode 100644
index 00000000..47353b30
--- /dev/null
+++ b/desktopData/src/main/kotlin/com/intelligentbackpack/desktopdata/db/DesktopDAO.kt
@@ -0,0 +1,106 @@
+package com.intelligentbackpack.desktopdata.db
+
+import androidx.room.Dao
+import androidx.room.Insert
+import androidx.room.OnConflictStrategy
+import androidx.room.Query
+import androidx.room.Transaction
+import com.intelligentbackpack.desktopdata.db.entities.Author
+import com.intelligentbackpack.desktopdata.db.entities.Book
+import com.intelligentbackpack.desktopdata.db.entities.SchoolSupply
+import com.intelligentbackpack.desktopdata.db.entities.SchoolSupplyType
+import com.intelligentbackpack.desktopdata.db.entities.Wrote
+import com.intelligentbackpack.desktopdata.db.relations.BookCopyWithAuthors
+import com.intelligentbackpack.desktopdata.db.relations.BookWithAuthors
+
+/**
+ * Desktop DAO to access database
+ */
+@Dao
+internal interface DesktopDAO {
+
+    /**
+     * Get an author id from the author name
+     *
+     * @param author author name
+     * @return author id
+     */
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    fun addAuthor(author: Author): Long
+
+    /**
+     * Get an authors' id from their names
+     *
+     * @param authors authors' name
+     * @return author ids
+     */
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    fun addAuthors(authors: List<Author>): List<Long>
+
+    /**
+     * Get a book from the book isbn
+     *
+     * @param book book isbn
+     * @return the book
+     */
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    fun addBook(book: Book)
+
+    /**
+     * Add a school supply to the database
+     *
+     * @param schoolSupply the school supply to add
+     */
+    @Insert(onConflict = OnConflictStrategy.ABORT)
+    fun addSchoolSupply(schoolSupply: SchoolSupply)
+
+    @Insert(onConflict = OnConflictStrategy.IGNORE)
+    fun addWrote(wrote: Wrote)
+
+    @Query("UPDATE school_supplies SET in_backpack = 1 WHERE rfid IN (:rfid)")
+    fun putSchoolSuppliesInBackpack(rfid: Set<String>)
+
+    @Query("UPDATE school_supplies SET in_backpack = 0 WHERE rfid IN (:rfid)")
+    fun takeSchoolSuppliesFromBackpack(rfid: Set<String>)
+
+    @Query("SELECT * FROM Authors WHERE name = :name")
+    fun getAuthors(name: String): List<Author>
+
+    @Query("SELECT * FROM Authors WHERE author_id = :authorId")
+    fun getAuthor(authorId: Long): Author
+
+    @Query("SELECT * FROM School_supply_types")
+    fun getSchoolSupplyTypes(): List<SchoolSupplyType>
+
+    @Query("SELECT * FROM School_supply_types WHERE type = :type")
+    fun getSchoolSupplyTypesFromName(type: String): List<SchoolSupplyType>
+
+    @Transaction
+    @Query("SELECT * FROM Books")
+    fun getBooks(): List<BookWithAuthors>
+
+    @Transaction
+    @Query("SELECT * FROM Books WHERE isbn = :isbn")
+    fun getBook(isbn: String): BookWithAuthors?
+
+    @Transaction
+    @Query("SELECT * FROM Book_copies WHERE rfid = :rfid")
+    fun getBookCopy(rfid: String): List<BookCopyWithAuthors>
+
+    @Transaction
+    @Query("SELECT * FROM Book_copies WHERE in_backpack = 1")
+    fun getBookCopiesInBackpack(): List<BookCopyWithAuthors>
+
+    @Transaction
+    @Query(
+        "SELECT School_supply_types.type" +
+                " FROM School_supplies INNER JOIN School_supply_types ON  School_supplies.type = School_supply_types.type_id " +
+                " WHERE rfid = :rfid"
+    )
+    fun getSchoolSupplyType(rfid: String): String?
+
+    @Transaction
+    @Query("SELECT rfid FROM School_supplies")
+    fun getAllSchoolSupplyRfid(): List<String>
+
+}