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一、统计

1.1 数据量统计

exec sp_spaceused 表名;

1.2 批量统计

本质是循环

exec sp_MSforeachtable "exec sp_spaceused '?'"

二、分页

2.1 topN

查看前5条

select TOP 5 *from T_ProductMain

2.2 分页查询

要查询上述结果中第 7 条到第 9 条记录

select top 3 id from tablename  
where id not in (  
  select top 6 id from tablename  
)

m-1=6，m=7

select top (n-m+1) id from tablename  
where id not in (  
  select top m-1 id from tablename  
)

通过行号分页

SELECT * FROM
(
SELECT ROW_NUMBER()over(order by getdate()) AS rownumber,* from T_ProductMain
) AS #a
WHERE #a.rownumber>=1 AND #a.rownumber<=5

sqlserver 2012及以上版本支持

SELECT * FROM T_AttrPart 
ORDER BY PartNo offset 0 ROWS FETCH NEXT 10 ROWS ONLY

三、元数据

3.1 查看所有表名

select top 10000
ROW_NUMBER() OVER (ORDER BY a.name) AS No, 
a.name AS 表名,
CONVERT(NVARCHAR(100),isnull(g.[value],'-')) AS 说明
from
sys.tables a left join sys.extended_properties g
on (a.object_id = g.major_id AND g.minor_id = 0);

3.2 查看字段及类型

select column_name name,data_type type 
from information_schema.columns 
where table_name = 'T_AltAffix'

3.3 查看数据库版本

SELECT SERVERPROPERTY('productversion') as version_code, SERVERPROPERTY ('productlevel') as version_level, SERVERPROPERTY ('edition') as version_type

3.4 系统自带

存储过程

dt_addtosourcecontrol  
dt_addtosourcecontrol_u  
dt_adduserobject  
dt_adduserobject_vcs  
dt_checkinobject  
dt_checkinobject_u  
dt_checkoutobject  
dt_checkoutobject_u  
dt_droppropertiesbyid  
dt_dropuserobjectbyid  
dt_generateansiname  
dt_getobjwithprop  
dt_getobjwithprop_u  
dt_getpropertiesbyid  
dt_getpropertiesbyid_u  
dt_getpropertiesbyid_vcs  
dt_getpropertiesbyid_vcs_u  
dt_isundersourcecontrol  
dt_isundersourcecontrol_u  
dt_removefromsourcecontrol  
dt_setpropertybyid  
dt_setpropertybyid_u  
dt_validateloginparams  
dt_validateloginparams_u  
dt_vcsenabled  
dt_verstamp006  
dt_verstamp007  
dt_whocheckedout  
dt_whocheckedout_u

3.5 查看字符集

SELECT COLLATIONPROPERTY('Chinese_PRC_Stroke_CI_AI_KS_WS', 'CodePage');

select SERVERPROPERTY('Sqlcharsetname');

字符集编码	类型
936	简体中文GBK
950	繁体中文BIG5
437	美国/加拿大英语
932	日文
949	韩文
866	俄文
65001	unicode UFT-8

3.6 查看数据占用大小

	SELECT a.name [文件名称] ,cast(a.[size]*1.0/128 as decimal(12,1)) AS [文件设置大小(MB)] ,
    CAST( fileproperty(s.name,'SpaceUsed')/(8*16.0) AS DECIMAL(12,1)) AS [文件所占空间(MB)] ,
    CAST( (fileproperty(s.name,'SpaceUsed')/(8*16.0))/(s.size/(8*16.0))*100.0 AS DECIMAL(12,1)) AS [所占空间率%] ,
    CASE WHEN A.growth =0 THEN '文件大小固定，不会增长' ELSE '文件将自动增长' end [增长模式] ,CASE WHEN A.growth > 0 AND is_percent_growth = 0 
    THEN '增量为固定大小' WHEN A.growth > 0 AND is_percent_growth = 1 THEN '增量将用整数百分比表示' ELSE '文件大小固定，不会增长' END AS [增量模式] ,
    CASE WHEN A.growth > 0 AND is_percent_growth = 0 THEN cast(cast(a.growth*1.0/128as decimal(12,0)) AS VARCHAR)+'MB' 
    WHEN A.growth > 0 AND is_percent_growth = 1 THEN cast(cast(a.growth AS decimal(12,0)) AS VARCHAR)+'%' ELSE '文件大小固定，不会增长' end AS [增长值(%或MB)] ,
    a.physical_name AS [文件所在目录] ,a.type_desc AS [文件类型] 
FROM sys.database_files a 
INNER JOIN sys.sysfiles AS s  ON a.[file_id]=s.fileid 
LEFT JOIN sys.dm_db_file_space_usage b ON a.[file_id]=b.[file_id] ORDER BY a.[type]

四、视图

索引视图

# 创建索引视图，必须指定列名
create view vwi_T_AttrPart WITH SCHEMABINDING as
SELECT ROW_NUMBER()over(order by getdate()) AS rownumber,PartNo ,ParentNO ,PartName ,SectNo ,OrderNo ,SessionCode ,IsNew ,AltMainNo ,PayPartID ,EngineerTypeID1 ,EngineerTypeID2 ,EngineerTypeID3 ,EngineerID ,SectDetailID ,StartPile ,EndPile ,CenterPile ,Mileage ,PartTypeID ,PartRemarks from dbo.T_AttrPart

# 添加索引列（报错:不能在索引或统计信息中使用 视图'dbo.vwi_T_AttrPart' 的列 'rownumber'，也不能将该列用作分区键，因为它不具有确定性）
CREATE UNIQUE CLUSTERED INDEX 
    ucidx_rownumber 
ON dbo.vwi_T_AttrPart(rownumber);

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