技術のコストを時代ごとに倍率で上げる

UPDATE Technologies
SET Cost = Cost * 1.25		/* 太古 */
WHERE EraType = 'ERA_ANCIENT'	
;
UPDATE Technologies
SET Cost = Cost * 1.50		/* 古典 */
WHERE EraType = 'ERA_CLASSICAL'	
;
UPDATE Technologies
SET Cost = Cost * 1.50		/* 中世 */
WHERE EraType = 'ERA_MEDIEVAL'	
;
UPDATE Technologies
SET Cost = Cost * 1.75		/* ルネサンス */
WHERE EraType = 'ERA_RENAISSANCE'	
;
UPDATE Technologies
SET Cost = Cost * 1.80		/* 産業 */
WHERE EraType = 'ERA_INDUSTRIAL'	
;
UPDATE Technologies
SET Cost = Cost * 2.20		/* 近代 */
WHERE EraType = 'ERA_MODERN'
;
UPDATE Technologies
SET Cost = Cost * 2.40		/* 原子力 */
WHERE EraType = 'ERA_ATOMIC'
;
UPDATE Technologies
SET Cost = Cost * 3.00		/* 情報 */
WHERE EraType = 'ERA_INFORMATION'
;
UPDATE Technologies
SET Cost = Cost * 3.00		/* 未来 */
WHERE EraType = 'ERA_FUTURE'
;