问题描述
我想向现有表中添加 2 个新列.
I want to add 2 new columns to existing table.
其中一个应该是 NOT NULL,默认值为 0(也填写现有行).
One of them should be NOT NULL with default value 0 (filled in the existing rows as well).
我尝试了以下语法:
Alter TABLE dbo.MamConfiguration add [IsLimitedByNumOfUsers] [bit] NOT NULL, CONSTRAINT IsLimitedByNumOfUsers_Defualt [IsLimitedByNumOfUsers] DEFAULT 0 [NumOfUsersLimit] [int] NULL go
但它抛出异常.我该怎么写?
But it throws exception. How should I write it?
推荐答案
你可以使用这个:
ALTER TABLE dbo.MamConfiguration ADD [IsLimitedByNumOfUsers] [BIT] NOT NULL DEFAULT 0, [NumOfUsersLimit] [INT] NULL GO
或者这个:
ALTER TABLE dbo.MamConfiguration ADD [IsLimitedByNumOfUsers] [BIT] NOT NULL CONSTRAINT IsLimitedByNumOfUsers_Default DEFAULT 0, [NumOfUsersLimit] [INT] NULL go
更多:ALTER TABLE