问题：
有字段 arrchildid 值为 21,11,1,2
我想删除其中的1，运行mysql （相关mysql视频教程推荐：《mysql教程》）
UPDATE `category` SET `arrchildid`=replace(`arrchildid`,',1','') WHERE `catid`=100
结果把不该删除的也删除了，有什么好的解决办法，万分感谢
PHPCMS用的就是这种数据结构，不过我没找到他是怎么处理的。当分类删除或修改时，其父分类的arrchildid 字段肯定是要改变的。
回复讨论(解决方案)
UPDATE `category` SET `arrchildid`=replace(concat(`arrchildid`,','), ',1,', '') WHERE `catid`=100
有字段 arrchildid 值为 21,11,1,2
我想删除其中的1，运行mysql
UPDATE `category` SET `arrchildid`=replace(`arrchildid`,',1','') WHERE `catid`=100
结果把不该删除的也删除了，有什么好的解决办法，万分感谢
PHPCMS用的就是这种数据结构，不过我没找到他是怎么处理的。当分类删除或修改时，其父分类的arrchildid 字段肯定是要改变的。
我在phpmyadmin运行该语句出错，另外，如果arrchildid 值为 21,2,11,1 也没法替换，还有更好的解决方法吗
有字段 arrchildid 值为 21,11,1,2
我想删除其中的1，运行mysql
UPDATE `category` SET `arrchildid`=replace(`arrchildid`,',1','') WHERE `catid`=100
结果把不该删除的也删除了，有什么好的解决办法，万分感谢
PHPCMS用的就是这种数据结构，不过我没找到他是怎么处理的。当分类删除或修改时，其父分类的arrchildid 字段肯定是要改变的。
我在phpmyadmin运行该语句出错，另外，如果arrchildid 值为 21,2,11,1 也没法替换，还有更好的解决方法吗
不知道是什么原因，手动打了一遍，SQL就不出错了
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