DELETE FROM `creature_loot_template` WHERE `entry` IN (NPCID1, NPCID2, NPCID3..., NPCID_LAST) AND `item`=12698;
INSERT INTO `creature_loot_template` (`entry`, `item`, `ChanceOrQuestChance`, `lootmode`, `groupid`, `mincountOrRef`, `maxcount`) VALUES
(NPCID1, 12698, 0.02, 1, 0, 1, 1),
(NPCID2, 12698, 0.02, 1, 0, 1, 1),
(NPCID3, 12698, 0.02, 1, 0, 1, 1),
.
.
.
(NPCID_LAST, 12698, 0.02, 1, 0, 1, 1);