 ALTER TABLE Nodes ADD CONSTRAINT FOREIGN KEY (UserID) REFERENCES Users(UserID);
 CREATE TABLE Edges
 (
-	EdgeID		INT PRIMARY KEY,
+	EdgeID		UNSIGNED INT PRIMARY KEY AUTO_INCREMENT,
 	ChildID		INT NOT NULL,
 	ParentID	INT NOT NULL,
 	UserID		INT NOT NULL,

);
CREATE TABLE FilesLog
(
	FilesLogID		INT PRIMARY KEY,
	Field			INT NOT NULL,
	UserID			INT NOT NULL,
	FileActionID	INT NOT NULL,

);
CREATE TABLE Comments
(
	CommentID	UNSIGNED INT PRIMARY KEY AUTO_INCREMENT,
	UserID		INT NOT NULL,
	FileID		INT NOT NULL,
	CommentText	INT NOT NULL,
