Question

如何在SQL Server表中创建动态字段？我想将它添加到create table命令：

isDeleted = CASE WHEN DeleteDate is null THEN 0 ELSE 1

Answer 1

您正在寻找创建computed column。

CREATE TABLE dbo.YourTable (
    ...
    isDeleted AS CASE WHEN DeleteDate IS NULL THEN 0 ELSE 1 END 
);

Answer 2

我不是100％确定你的动态字段是什么意思，但我认为这就是你所要求的：

SELECT    MyTable.Foo,
          CASE WHEN MyTable.Foo = "FOO" THEN
              0
          ELSE
              1
          END AS isDeleted
FROM      MyTable

SQL Server中的动态字段

2 个答案: