SQL分组取每组前一(或几)条记录(排名)

ゝ一纸荒年。 2022-05-30 11:25 173阅读 0赞

USE [Test]
    GO
    /****** Object: Table [dbo].[scores] Script Date: 2018/3/11 17:59:15 ******/
    SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO SET ANSI_PADDING ON GO CREATE TABLE [dbo].[scores]( [ID] [int] IDENTITY(1,1) NOT NULL, [name] [varchar](10) NULL, [course] [varchar](10) NULL, [score] [decimal](4, 2) NULL, CONSTRAINT [PK__score__3214EC276D139B95] PRIMARY KEY CLUSTERED ( [ID] 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 SET ANSI_PADDING OFF GO SET IDENTITY_INSERT [dbo].[scores] ON INSERT [dbo].[scores] ([ID], [name], [course], [score]) VALUES (1, N'小明', N'语文', CAST(90.00 AS Decimal(4, 2))) INSERT [dbo].[scores] ([ID], [name], [course], [score]) VALUES (2, N'小明', N'数学', CAST(80.00 AS Decimal(4, 2))) INSERT [dbo].[scores] ([ID], [name], [course], [score]) VALUES (3, N'小明', N'英语', CAST(60.00 AS Decimal(4, 2))) INSERT [dbo].[scores] ([ID], [name], [course], [score]) VALUES (4, N'小红', N'语文', CAST(93.00 AS Decimal(4, 2))) INSERT [dbo].[scores] ([ID], [name], [course], [score]) VALUES (5, N'小红', N'数学', CAST(92.00 AS Decimal(4, 2))) INSERT [dbo].[scores] ([ID], [name], [course], [score]) VALUES (6, N'小红', N'英语', CAST(91.00 AS Decimal(4, 2))) INSERT [dbo].[scores] ([ID], [name], [course], [score]) VALUES (7, N'小花', N'语文', CAST(50.00 AS Decimal(4, 2))) INSERT [dbo].[scores] ([ID], [name], [course], [score]) VALUES (8, N'小花', N'数学', CAST(30.00 AS Decimal(4, 2))) INSERT [dbo].[scores] ([ID], [name], [course], [score]) VALUES (9, N'小花', N'英语', CAST(70.00 AS Decimal(4, 2))) INSERT [dbo].[scores] ([ID], [name], [course], [score]) VALUES (10, N'小草', N'语文', CAST(95.00 AS Decimal(4, 2))) INSERT [dbo].[scores] ([ID], [name], [course], [score]) VALUES (11, N'小草', N'数学', CAST(86.00 AS Decimal(4, 2))) INSERT [dbo].[scores] ([ID], [name], [course], [score]) VALUES (12, N'小草', N'英语', CAST(62.00 AS Decimal(4, 2))) INSERT [dbo].[scores] ([ID], [name], [course], [score]) VALUES (13, N'小刚', N'语文', CAST(78.00 AS Decimal(4, 2))) INSERT [dbo].[scores] ([ID], [name], [course], [score]) VALUES (14, N'小刚', N'数学', CAST(68.00 AS Decimal(4, 2))) INSERT [dbo].[scores] ([ID], [name], [course], [score]) VALUES (15, N'小刚', N'英语', CAST(76.00 AS Decimal(4, 2))) INSERT [dbo].[scores] ([ID], [name], [course], [score]) VALUES (16, N'小柔', N'语文', CAST(56.00 AS Decimal(4, 2))) INSERT [dbo].[scores] ([ID], [name], [course], [score]) VALUES (17, N'小柔', N'数学', CAST(86.00 AS Decimal(4, 2))) INSERT [dbo].[scores] ([ID], [name], [course], [score]) VALUES (18, N'小柔', N'英语', CAST(88.00 AS Decimal(4, 2))) INSERT [dbo].[scores] ([ID], [name], [course], [score]) VALUES (19, N'小陈', N'语文', CAST(77.00 AS Decimal(4, 2))) INSERT [dbo].[scores] ([ID], [name], [course], [score]) VALUES (20, N'小陈', N'数学', CAST(88.00 AS Decimal(4, 2))) INSERT [dbo].[scores] ([ID], [name], [course], [score]) VALUES (21, N'小陈', N'英语', CAST(99.00 AS Decimal(4, 2))) SET IDENTITY_INSERT [dbo].[scores] OFF

方法一：

select course,name, score from scores sc where name in( select top 3 name from scores where sc.course=course ) group by course,name, score order by course,score desc

方法二：

select * from ( select *, ROW_NUMBER() over(partition by course order by score desc) rowNum from scores ) as s where s.rowNum<=3