模糊查询功能：价格区间功能实现。

–测试;检索出所有的商品
SELECT
*
FROM
V_IA_EGC_BRIDGE
WHERE
NAME LIKE ‘%%’
AND (’’ = ‘’ OR WIDTH >= ‘’)
AND (’’ = ‘’ OR WIDTH <= ‘’)

–测试;得不到符合条件的数据
SELECT
*
FROM
V_IA_EGC_BRIDGE
WHERE
NAME LIKE ‘%%’
AND WIDTH >= ‘’
AND WIDTH <= ‘’