CREATE TABLE table_12578 ("Version" CLOB, "Fairing" CLOB, "CCBs" FLOAT, "SRBs" CLOB, "Upper stage" CLOB, "Payload to LEO" CLOB, "Payload to GTO" CLOB, "Launches to date" FLOAT)

What is the greatest CCBs with Launches to date of 4, and a Payload to GTO of 8,900kg?
SELECT MAX("CCBs") FROM table_12578 WHERE "Launches to date" = '4' AND "Payload to GTO" = '8,900kg'
SELECT MAX("CCBs") FROM "table_12578" WHERE "Launches to date" = '4' AND "Payload to GTO" = '8,900kg'