dbHelper.deleteAll("ARTIST_GROUP");
dbHelper.deleteAll("ARTIST");
dbHelper.deleteAll("EXHIBIT");
dbHelper.deleteAll("GALLERY");
tArtist = new TableHelper(dbHelper, "ARTIST");
tArtist.setColumns("ARTIST_ID", "ARTIST_NAME");
tPainting = new TableHelper(dbHelper, "PAINTING");
tPainting.setColumns(
"PAINTING_ID",
"PAINTING_TITLE",
"ARTIST_ID",
"ESTIMATED_PRICE");
tPaintingInfo = new TableHelper(dbHelper, "PAINTING_INFO");
tPaintingInfo.setColumns("PAINTING_ID", "TEXT_REVIEW");
tExhibit = new TableHelper(dbHelper, "EXHIBIT");
tExhibit.setColumns("EXHIBIT_ID", "GALLERY_ID", "OPENING_DATE", "CLOSING_DATE");
tArtistExhibit = new TableHelper(dbHelper, "ARTIST_EXHIBIT");
tArtistExhibit.setColumns("ARTIST_ID", "EXHIBIT_ID");
tGallery = new TableHelper(dbHelper, "GALLERY");
tGallery.setColumns("GALLERY_ID", "GALLERY_NAME");
}