Schema: CREATE TABLE Documents (document_name VARCHAR, document_id VARCHAR); CREATE TABLE Paragraphs (document_id VARCHAR)
Question: Show all document ids, names and the number of paragraphs in each document.
SQL: SELECT T1.document_id, T2.document_name, COUNT(*) FROM Paragraphs AS T1 JOIN Documents AS T2 ON T1.document_id = T2.document_id GROUP BY T1.document_id