SQl Server 索引

USE DB
GO

IF NOT EXISTS(SELECT Name FROM SysColumns WHERE id=Object_Id('[HIS_QUEUE]') AND Name = 'InsertDateTime')
BEGIN   
   ALTER TABLE HIS_QUEUE ADD InsertDateTime  datetime DEFAULT (CONVERT([date],CONVERT([varchar](100),getdate(),(23)),(23)))     
END
GO
IF NOT EXISTS(SELECT Name FROM SysColumns WHERE id=Object_Id('[QUEUEDETAIL]') AND Name = 'InsertDateTime')
BEGIN
   ALTER TABLE QUEUEDETAIL ADD InsertDateTime  datetime DEFAULT (CONVERT([date],CONVERT([varchar](100),getdate(),(23)),(23)))  
   
END
GO
update QUEUEDETAIL set InsertDateTime=(CONVERT([datetime], QUEUEDETAIL.APPOINTDATE  ,(20)))
update HIS_QUEUE set InsertDateTime=(CONVERT([datetime], HIS_QUEUE.[InsertDate]  ,(20))) 
GO

/****** Object:  Index [DF_HISQUEUE_InsertDateTime]    Script Date: 2023-05-31 10:21:54 ******/

IF EXISTS (SELECT name FROM sys.indexes  
            WHERE name = N'DF_HISQUEUE_InsertDateTime')   
DROP INDEX [DF_HISQUEUE_InsertDateTime] ON [dbo].[HIS_QUEUE] WITH ( ONLINE = OFF )
GO 

/****** Object:  Index [DF_HISQUEUE_InsertDateTime]    Script Date: 2023-05-31 10:21:54 ******/
CREATE CLUSTERED INDEX [DF_HISQUEUE_InsertDateTime] ON [dbo].[HIS_QUEUE]
(
	InsertDateTime desc,
	[APPOINTSDATE] DESC,
	[APPKIND] DESC,
	[HISEXAMNO] DESC,
	[HISID] DESC,
	[NAME] DESC,
	[QUEUENAME] DESC,
	[EXECUTEDEPT] DESC

)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
GO

/****** Object:  Index [DF_QUEUEDETAIL_InsertDateTime]    Script Date: 2023-05-31 10:34:41 ******/
IF EXISTS (SELECT name FROM sys.indexes  
            WHERE name = N'DF_QUEUEDETAIL_InsertDateTime')   
DROP INDEX [DF_QUEUEDETAIL_InsertDateTime] ON [dbo].[QUEUEDETAIL] WITH ( ONLINE = OFF )
GO 

/****** Object:  Index [DF_QUEUEDETAIL_InsertDateTime]    Script Date: 2023-05-31 10:34:41 ******/
CREATE CLUSTERED INDEX [DF_QUEUEDETAIL_InsertDateTime] ON [dbo].[QUEUEDETAIL]
(
	InsertDateTime desc,
	[APPOINTDATE] DESC,
	[APPKIND] DESC,
	[HISEXAMNO] DESC,
	[QUEUENAME] DESC,
	DIRECTION DESC,
	--CheckItemRemark DESC,
	PARTOFCHECK DESC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
GO

　　

 SQL SERVER提供了两种索引：聚集索引（clustered index，也称聚类索引、簇集索引）和非聚集索引（nonclustered index，也称非聚类索引、非簇集索引）

注：主键列默认为聚簇索引，聚簇索引只能有一个，非聚簇索引可以有多个；一般建议在对表创建索引时，使用日期类型的列创建且创建为降序。

 在创建复合索引是建议将日期列作为首列，同时在使用列上应遵循——使用频繁使用的列

索引分为：聚集索引、非聚集索引

1.聚集索引--表的存储顺序

在聚集索引中，每张表只能有一个；

在聚集索引中，索引的顺序决定表中数据的顺序；

在聚集索引中，在表中创建主键列或唯一约束时，会自动创建聚集索引(即在表中添加主键列时，数据库引擎会自动创建约束和索引)；

2.非聚集索引

非聚集索引，可以有多个；

在非在聚集索引中，索引的结构完全独立与数据行的结构；

在非在聚集索引中，数据表中的数据行和索引的顺序不一致；

查看指定表的索引 

exec sp_helpindex his_queue

go
exec sp_helpindex queuedetail