when was it commissioned when the destroyer was built by scotts, greenock?
CREATE TABLE "ca_or_11th_emergency_flotilla" (
  "name" text,
  "pennant" text,
  "builder" text,
  "laid_down" text,
  "launched" text,
  "commissioned" text
);
SELECT "commissioned" FROM "ca_or_11th_emergency_flotilla" WHERE "builder"='scotts, greenock';