CREATE TABLE table_21673 ("SNO" FLOAT, "College code" TEXT, "Faculty name" TEXT, "Designation" TEXT, "Qualification" TEXT, "Department" TEXT, "Experience" TEXT)

How many faculty members have 20 years of experience?
SELECT COUNT("Designation") FROM table_21673 WHERE "Experience" = '20 years'
SELECT COUNT("Designation") FROM "table_21673" WHERE "Experience" = '20 years'