如何修改列的默认值T-SQL

 

如何修改列的默认值T-SQL

没有办法直接通过脚本修改列的默认值。只能先删除原来默认值的约束，再重新添加默认值的约束

 

SELECT d.definition d.name,*

FROM sys.default_constraints AS d

INNER JOIN sys.columns AS c

ON d.parent_column_id = c.column_id

WHERE d.parent_object_id = OBJECT_ID(N'table name', N'U')

AND c.name = 'column name';



----

alter table [table name]

drop constraint [上面d.name]

go

alter table [table name]

add constraint 约束的名字 default 1  for column Name

go

exec sp_helpconstraint [table name]