1CREATE TABLE PAGE_REFERENCES 2( 3 SOURCE_ID TEXT, 4 TARGET_ID TEXT 5); 6 7CREATE UNIQUE INDEX PAGE_REFERENCES_IDX ON PAGE_REFERENCES (SOURCE_ID,TARGET_ID); 8CREATE INDEX PAGE_REFERENCES_IDX_SOURCE ON PAGE_REFERENCES (SOURCE_ID); 9CREATE INDEX PAGE_REFERENCES_IDX_TARGET ON PAGE_REFERENCES (TARGET_ID); 10 11 12 13 14 15 16 17 18