CREATE TABLE table_30661 ("Stage" CLOB, "Unit Number" FLOAT, "Installed Capacity  (  MW  ) " CLOB, "Date of Commissioning" CLOB, "Status" CLOB, "TG set Provider" CLOB, "Boiler Provider" CLOB)

What are Unit 2's dates of commissioning?
SELECT COUNT("Date of Commissioning") FROM table_30661 WHERE "Unit Number" = '2'
SELECT COUNT("Date of Commissioning") FROM "table_30661" WHERE "Unit Number" = '2'