MSSQL修改指定表列的排序规则

--修改数据库表字段排序规则：

select a.name,a.max_length,a.user_type_id,a.collation_name,

'alter table ['+c.name+'] alter column '+a.name +' '

+

case

when a.user_type_id=231 then 'nvarchar('+ case when a.max_length=-1 then 'max' else cast(a.max_length/2 as varchar(100)) end+')'

else 'varchar('+case when a.max_length=-1 then 'max' else cast(a.max_length as varchar(100)) end+')' end

+

' COLLATE Chinese_PRC_CI_AS'

from sys.columns a

left join sys.objects c on a.OBJECT_ID=c.OBJECT_ID

where c.type='U' and c.name = 'User'

and a.user_type_id in (167,231) -- --167:varchar --231:nvarchar

GO