我正在尝试使用名为profileID的计算列创建一个表，但是当我尝试这个时：
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</svg>然而，当我转到创建它时，我收到此错误：
只能在计算列上创建UNIQUE或PRIMARY KEY约束，而CHECK，FOREIGN KEY和NOT NULL约束要求保留计算列。
我已尝试将profileID行调整为此
CREATE TABLE Profiles
(
[id] [int] IDENTITY(1,1) NOT NULL,
[profileID] AS ((id * 19379 - 62327) % 99991) NOT NULL
)
但我仍然得到同样的错误。
仅供参考我有另一个名为id的列，它是主键，是唯一且自动增加的。
答案 0 :(得分：4)
错误消息非常明确 - 您只能对计算列使用唯一或主键约束。除非它持久存在，否则您无法创建具有非空约束的计算列。
因此要么将该列创建为persisted：
CREATE TABLE Profiles
(
[id] [int] IDENTITY(1,1) NOT NULL,
[profileID] as ( (id * 19379 - 62327) % 99991) PERSISTED NOT NULL
)
或者只是移除not null（无论如何它永远不会为空）
CREATE TABLE Profiles
(
[id] [int] IDENTITY(1,1) NOT NULL,
[profileID] as ( (id * 19379 - 62327) % 99991)
)