CREATE TABLE table_1606 ("Team" CLOB, "Outgoing manager" CLOB, "Manner of departure" CLOB, "Date of vacancy" CLOB, "Replaced by" CLOB, "Date of appointment" CLOB)

What was the date of vacancy when Viorel Moldovan replaced a manager?
SELECT "Date of vacancy" FROM table_1606 WHERE "Replaced by" = 'Viorel Moldovan'
SELECT "Date of vacancy" FROM "table_1606" WHERE "Replaced by" = 'Viorel Moldovan'