限制网站频繁访问

CREATE TABLE [dbo].[Zz_AccessIP](
 [IP] [nvarchar](50) NOT NULL,
 [FirstDateTime] [datetime] NOT NULL,
 [LastDateTime] [datetime] NOT NULL,
 [Times] [int] NOT NULL,
 CONSTRAINT [PK_Zz_AccessIP] PRIMARY KEY CLUSTERED 
(
 [IP] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
 
GO
 
ALTER TABLE [dbo].[Zz_AccessIP] ADD CONSTRAINT [DF_Zz_AccessIP_FirstDateTime] DEFAULT (getdate()) FOR [FirstDateTime]
GO
 
ALTER TABLE [dbo].[Zz_AccessIP] ADD CONSTRAINT [DF_Zz_AccessIP_LastDateTime] DEFAULT (getdate()) FOR [LastDateTime]
GO
 
ALTER TABLE [dbo].[Zz_AccessIP] ADD CONSTRAINT [DF_Zz_AccessIP_Times] DEFAULT ((0)) FOR [Times]
GO