SQL Server中的动态字段

Question

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

isDeleted = CASE WHEN DeleteDate is null THEN 0 ELSE 1 

Answer 1

您正在创建computed column。

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

Answer 2

我不是100％肯定，你的动力场的意思，但我认为这是你问的：

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