CREATE TABLE table_15700367_6 (overs_bowled VARCHAR2, name VARCHAR2)

How many overs bowled for muttiah muralitharan?
SELECT COUNT(overs_bowled) FROM table_15700367_6 WHERE name = "Muttiah Muralitharan"
SELECT COUNT("overs_bowled") FROM "table_15700367_6" WHERE "Muttiah Muralitharan" = "name"