问题描述
我正在尝试获取给定表的默认约束信息.我是这样写的:
I am trying to get the Default Constraints information for a given table. I wrote something like this:
SELECT c.name , col.name FROM Rem.sys.default_constraints c INNER JOIN Rem.sys.columns col ON col.default_object_id = c.object_id INNER JOIN Rem.sys.objects o ON o.object_id = c.parent_object_id INNER JOIN Rem.sys.schemas s ON s.schema_id = o.schema_id WHERE s.name = 'dbo' AND o.name = 'Desk_Hist'
但它不会返回我的默认值.所以我尝试了不同的方式,查询是:
But it doesn't return me the default value. So I tried a different way and the query is:
SELECT * FROM Rem.information_schema.columns columns WHERE columns.table_catalog = 'Rem' AND columns.table_schema = 'dbo' AND columns.table_name = 'Desk_Hist' AND COLUMN_DEFAULT IS NOT NULL
但它什么也没给我返回.
But it returns me nothing.
有人可以帮我吗?
推荐答案
默认值在 'definition' 列中,尝试在没有 where 的情况下运行查询:
Default value is in column 'definition', try to run query without where:
SELECT c.name , col.name, c.definition FROM Rem.sys.default_constraints c INNER JOIN Rem.sys.columns col ON col.default_object_id = c.object_id INNER JOIN Rem.sys.objects o ON o.object_id = c.parent_object_id INNER JOIN Rem.sys.schemas s ON s.schema_id = o.schema_id