我在SQL Server中有一个日志表,看起来像这样:
CREATE TABLE [dbo].[RefundProcessLog](
[LogId] [bigint] IDENTITY(1,1) NOT NULL,
[LogDate] [datetime] NOT NULL,
[LogType] [varchar](10) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL,
[RefundId] [int] NULL,
[RefundTypeId] [smallint] NULL,
[LogMessage] [varchar](1000) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL,
[LoggedBy] [varchar](50) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL,
CONSTRAINT [PK_RefundProcessLog] PRIMARY KEY CLUSTERED
(
[LogId] ASC
) ON [PRIMARY]
) ON [PRIMARY]
GO
我想要一个结果列表,表示每天处理了多少个不同的refundid,排除任何NULL值。我需要编写什么SQL语句才能生成这些结果?