SQLServer 2008 R2查看字段约束

SQLServer 2008 R2 删除字段前检查字段的约束：

select a.name,b.name as cname
from syscolumns a
left join sysobjects b
on a.cdefault=b.id
where a.id=object_id(‘TableName‘) and a.name=‘FieldName‘

SQLServer 2008 R2查看字段约束

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