CREATE TABLE table_65819 ("Part Number" TEXT, "Pins" TEXT, "Body Width/mm" FLOAT, "Body Length/mm" FLOAT, "Lead Pitch/mm" FLOAT)

Which Body Length/mm has a Lead Pitch/mm smaller than 0.5?
SELECT AVG("Body Length/mm") FROM table_65819 WHERE "Lead Pitch/mm" < '0.5'
SELECT AVG("Body Length/mm") FROM "table_65819" WHERE "Lead Pitch/mm" < '0.5'