从SQLite触发器中止以下语句

找到了答案：

CREATE TRIGGER IF NOT EXISTS "prevent_duplicate_emails"BEFORE INSERT OF "email" ON "users"FOR EACH ROWBEGIN    SELECt RAISE(ABORT, 'Email already exists.')    WHERe EXISTS (SELECT 1 FROM "unique_emails"       WHERe "email" LIKE NEW."email");    INSERT INTO "unique_emails" VALUES (NEW."email");END;