sql-server - 添加新列并设置外键关系

我想在CDRLive中添加新列“IPkey”，这是ACIPin中的主键“pkey”。
pkey是bigint，而不是null。

ALTER TABLE CDRLive ADD IPkey bigint NOT NULL
go
ALTER TABLE CDRLive
ADD CONSTRAINT CDRLive_IPkey FOREIGN KEY(IPkey) REFERENCES ACIPin(pkey)

失败的。错误:

Msg 4901, Level 16, State 1, Line 2
ALTER TABLE only allows columns to be added that can contain nulls, or have a DEFAULT     definition specified, or the column being added is an identity or timestamp column, or alternatively if none of the previous conditions are satisfied the table must be empty to allow addition of this column. Column 'IPkey' cannot be added to non-empty table 'CDRLive' because it does not satisfy these conditions.
 Msg 1769, Level 16, State 1, Line 1

 Foreign key 'CDRLive_IPkey' references invalid column 'IPkey' in referencing table 'CDRLive'.
 Msg 1750, Level 16, State 0, Line 1
 Could not create constraint. See previous errors.

最佳答案

如果希望该列具有NOT NULL约束，则需要按以下顺序进行操作。

ALTER TABLE CDRLive ADD IPkey bigint NULLgo

用您喜欢的数据填充列。

ALTER TABLE CDRLive ADD IPkey bigint NOT NULLgo

ALTER TABLE CDRLiveADD CONSTRAINT CDRLive_IPkey FOREIGN KEY(IPkey) REFERENCES ACIPin(pkey)

关于sql-server - 添加新列并设置外键关系，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/15297947/