CREATE TABLE document_sections_images (section_id VARCHAR)
CREATE TABLE documents (document_name VARCHAR)
CREATE TABLE document_sections (document_code VARCHAR, section_id VARCHAR)

Find names of the document without any images.
SELECT document_name FROM documents EXCEPT SELECT t1.document_name FROM documents AS t1 JOIN document_sections AS t2 ON t1.document_code = t2.document_code JOIN document_sections_images AS t3 ON t2.section_id = t3.section_id
SELECT "document_name" FROM "documents" EXCEPT SELECT "t1"."document_name" FROM "documents" AS "t1" JOIN "document_sections" AS "t2" ON "t1"."document_code" = "t2"."document_code" JOIN "document_sections_images" AS "t3" ON "t2"."section_id" = "t3"."section_id"