CREATE TABLE journal_committee (editor_id DECIMAL, journal_id DECIMAL, work_type TEXT)
CREATE TABLE editor (editor_id DECIMAL, name TEXT, age DECIMAL)
CREATE TABLE journal (journal_id DECIMAL, date TEXT, theme TEXT, sales DECIMAL)

Show the names of editors that are on at least two journal committees.
SELECT T1.name FROM editor AS T1 JOIN journal_committee AS T2 ON T1.editor_id = T2.editor_id GROUP BY T1.name HAVING COUNT(*) >= 2
SELECT "T1"."name" FROM "editor" AS "T1" JOIN "journal_committee" AS "T2" ON "T1"."editor_id" = "T2"."editor_id" GROUP BY "T1"."name" HAVING COUNT(*) >= 2