CREATE TABLE "external_links" (
  "sno" real,
  "college_code" text,
  "faculty_name" text,
  "designation" text,
  "qualification" text,
  "department" text,
  "experience" text
);

Question: Which departments have M.Phil(Maths)?
SQL: SELECT "department" FROM "external_links" WHERE "qualification"='M.Phil(Maths)';

Question: How many faculty members have 20 years of experience? 
SQL: SELECT COUNT("designation") FROM "external_links" WHERE "experience"='20 years';