1CREATE TABLE data ( 2 subject TEXT NOT NULL COLLATE NOCASE, 3 predicate TEXT NOT NULL COLLATE NOCASE, 4 object TEXT NOT NULL COLLATE NOCASE, 5 graph TEXT NOT NULL COLLATE NOCASE 6); 7 8-- index for subject-primary retrieval (index prefixes: s, sp) 9CREATE INDEX idx_spo ON data(subject, predicate, object); 10 11-- index for predicate-primary retrieval (i.e. property fetch) 12CREATE INDEX idx_pso ON data(predicate, subject, object); 13