//1、生成隨機(jī)數(shù) ROUND(((89 - 71 -1) * RAND() + 71), 0) DECLARE @Result INT DECLARE @Upper INT DECLARE @Lower INT SET @Lower = 1 SET @Upper = 10 SELECT @Result = ROUND(((@Upper - @Lower -1) * RAND() + @Lower), 0) SELECT @Result//2、字段為空，輸出默認(rèn)值 isnull(wj.wjsum,0) as wjsum//數(shù)字isnull(wj.wjsum,'無') as wjsum//字符//3、GROUP BY 中Count SELECT TOP 100 PERCENT wjs_scid,COUNT (wjs_scid) AS scidsum FROM [dbo].[wj_selectresult_wj] WHERE wjs_id = 28 GROUP BY wjs_id,wjs_cid,wjs_scid //視圖或多表查詢用到TOP 100 PERCENT //因?yàn)镾QL規(guī)則規(guī)定，如果子查詢里，有order ...，就必須有TOP，所以就用SELECT TOP 100 PERCENT來限定SELECT wjs_scid,COUNT (DISTINCT operator_id) AS scidsum FROM [dbo].[wj_selectresult_wj] WHERE wjs_id = 28 GROUP BY wjs_scid ;//分組 去重復(fù) 計(jì)數(shù)//4、固定輸出列 SELECT wjc.*, scidsum,wjsperc=0,wjpsum='0' FROM [dbo].[wjcontent_wj]//5查詢多字段重復(fù) select group_id,app_id,operator_id from app_messages group by group_id,app_id,operator_id having count(*) > 1//6 日期+- select DateAdd(month,-1,DateAdd(dd,-1, DateAdd(yy,5,'2017-08-04'))) //+5年 -天 -一個(gè)月//7 petapoco 分頁SELECTCOUNT (*) FROMSys_User u LEFT JOIN Sys_Organize o ON u.DepartmentId = o.Id WHERE(u.DeleteMark = 0AND u.Account LIKE @0OR u.RealName LIKE @1)SELECT* FROM(SELECTROW_NUMBER () OVER (ORDER BY u.SortCode) peta_rn,u.*, o.FullNameFROMSys_User uLEFT JOIN Sys_Organize o ON u.DepartmentId = o.IdWHERE(u.DeleteMark = 0AND u.Account LIKE @0OR u.RealName LIKE @1)) peta_paged WHEREpeta_rn > @2 AND peta_rn <= @3 //字符串in 操作 charindex mysql 用instr 不太好用，不推薦使用，請用 轉(zhuǎn)int 方式 SELECTId,Name,ParentId FROMHR_PostWorkType WHERE1 = 1 AND charindex(PostId,'9,10,0') <> 0 ORDER BYSortCode ASC//按生日得到當(dāng)前年齡SELECT dbo.HR_Person.RealName as 姓名,Gender_Name as 性別,FLOOR(datediff(DY,Birthday,getdate())/365.25) as 年齡,dbo.HR_Person.CardNum as 身份證號,dbo.HR_Person.Org_Name as 單位,MobilePhone as 聯(lián)系電話,Address as 地址 FROM [dbo].[HR_Person] WHERE--備份mssql數(shù)據(jù)庫declare @strfile nvarchar(1000) SET @strfile ='D:\DB\DDPT\edu_dudao'+CONVERT(varchar(100), GETDATE(), 12)+'.bak' declare @strName nvarchar(1000) SET @strName ='edu_dudao'+CONVERT(varchar(100), GETDATE(), 12)BACKUP DATABASE [edu_dudao] TODISK = @strfile WITHNAME = @strName,NOFORMAT, NOINIT, SKIP,STATS = 5--按月份統(tǒng)計(jì)數(shù)量SELECTYEAR (HR_WorkRecord.StartTime) 年,MONTH (HR_WorkRecord.StartTime) 月,COUNT (1) 數(shù)量 FROMHR_WorkRecord WHERE year(HR_WorkRecord.StartTime)='2018' GROUP BYYEAR (HR_WorkRecord.StartTime) , MONTH (HR_WorkRecord.StartTime)select sum(case month(HR_WorkRecord.StartTime) when '1' then 1 else 0 end) as 一月, sum(case month(HR_WorkRecord.StartTime) when '2' then 1 else 0 end) as 二月, sum(case month(HR_WorkRecord.StartTime) when '3' then 1 else 0 end) as 三月, sum(case month(HR_WorkRecord.StartTime) when '4' then 1 else 0 end) as 四月, sum(case month(HR_WorkRecord.StartTime) when '5' then 1 else 0 end) as 五月, sum(case month(HR_WorkRecord.StartTime) when '6' then 1 else 0 end) as 六月, sum(case month(HR_WorkRecord.StartTime) when '7' then 1 else 0 end) as 七月, sum(case month(HR_WorkRecord.StartTime) when '8' then 1 else 0 end) as 八月, sum(case month(HR_WorkRecord.StartTime) when '9' then 1 else 0 end) as 九月, sum(case month(HR_WorkRecord.StartTime) when '10' then 1 else 0 end) as 十月, sum(case month(HR_WorkRecord.StartTime) when '11' then 1 else 0 end) as 十一月, sum(case month(HR_WorkRecord.StartTime) when '12' then 1 else 0 end) as 十二月 from HR_WorkRecord where year(HR_WorkRecord.StartTime)='2018';--統(tǒng)計(jì)銷售額 1、每年 select year(ordertime) 年， sum(Total) 銷售合計(jì) from 訂單表 group by year(ordertime) 2、每月 select year(ordertime) 年， month(ordertime) 月, sum(Total) 銷售合計(jì) from 訂單表 group by year(ordertime)， month(ordertime 3、每日 select year(ordertime) 年， month(ordertime) 月, day(ordertime) 日， sum(Total) 銷售合計(jì) from 訂單表 group by year(ordertime)， month(ordertime), day(ordertime) 另外每日也可以這樣: select convert(char(8),ordertime,112) dt， sum(Total) 銷售合計(jì) from 訂單表 group by convert(char(8),ordertime,112) 如果需要增加查詢條件，在from后加where 即可。

轉(zhuǎn)載于:https://www.cnblogs.com/chenmfly/p/5735561.html

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