优化这段代码 declare @BH varchar(20) declare @CJ varchar(20) declare @JT varchar(20) declare @DTSL varchar(20) declare @SJRQ varchar(20) declare @XJRQ varchar(20) declare @SJTS varchar(20) declare @SJTSCK varchar(20) declare @SJTSZD varchar(20) declare @BEIZHU varchar(20) DECLARE youbiao CURSOR FOR--游标 select a.FNumber 编号, --a.F_101 刀头厂家内码, b.FName 刀头厂家, --a.F_107 大切机台内码, c.FName 大切机台, a.F_103 刀头数量, a.F_104 上机日期, a.F_105 下机日期, a.F_109 上机天数, a.F_110 "上机天数（参考）", DATEDIFF(day,a.F_104,a.F_105) "上机天数（自动计算）", --要减掉中间没有生产的日期？ a.F_108 备注 from t_Item_3030 a left join t_Item_3013 b on a.F_101=b.FItemID left join t_Item_3010 c on a.F_107=c.FItemID open youbiao fetch next from youbiao into @BH,@CJ,@JT,@DTSL,@SJRQ,@XJRQ,@SJTS,@SJTSCK,@SJTSZD,@BEIZHU----赋值 while @@fetch_status=0 --循环读取 begin fetch next from youbiao into @BH,@CJ,@JT,@DTSL,@SJRQ,@XJRQ,@SJTS,@SJTSCK,@SJTSZD,@BEIZHU select @BH 编号, @CJ 刀头厂家, a2.机台号, @SJRQ 上机日期, @XJRQ 下机日期, @SJTS 上机天数, @SJTSCK 上机天数参考, @SJTSZD 上机天数自动, @BEIZHU 备注, SUM(a2.平方数)平方数, SUM(a2.立方数)立方数 from( SELECT a1.生产日期, a1.机台号, sum(a1.平方数)平方数, sum(a1.立方数)立方数 FROM( select --a.FDate 生产日期, convert(char(10),a.FDate,121) 生产日期, --b.FBase 大切机台内码, c.FName 机台号, b.FDecimal4 厚度CM, b.FDecimal 平方数, b.FDecimal1 立方数, --b.FBase4 刀头厂商内码, --g.FNumber 刀头厂商编号, g.FName 刀头厂商 from t_BOS200000001 a left join t_BOS200000001Entry2 b on a.FID=b.FID left join t_Item_3010 c on b.FBase=c.FItemID left join t_Item_3014 d on b.FBase1=d.FItemID left join t_Item_3011 e on b.FBase2=e.FItemID left join t_Item_3012 f on b.FBase3=f.FItemID left join t_Item_3013 g on b.FBase4=g.FItemID where a.FDate between @SJRQ and @XJRQ and c.FName=@JT )a1 group by a1.机台号,a1.生产日期 )a2 group by a2.机台号 end close youbiao --关闭 deallocate youbiao--释放

解释一下：CREATE PROCEDURE [dbo].[GenerateDocumentCode] @DocumentType VARCHAR(50), @DocumentCode VARCHAR(50) OUTPUT AS BEGIN DECLARE @Prefix VARCHAR(10) DECLARE @Suffix VARCHAR(10) DECLARE @Counter INT SET @Prefix = LEFT(@DocumentType, 3) SET @Suffix = RIGHT(@DocumentType, 3) SELECT @Counter = ISNULL(MAX(CAST(RIGHT(DocumentCode, 6) AS INT)), 0) + 1 FROM dbo.Documents WHERE LEFT(DocumentCode, 3) = @Prefix AND RIGHT(DocumentCode, 3) = @Suffix SET @DocumentCode = @Prefix + RIGHT('000000' + CAST(@Counter AS VARCHAR(6)), 6) + @Suffix END

这是一个 SQL 存储过程，名为 GenerateDocumentCode，它接受两个参数：@DocumentType 和 @DocumentCode。其中，@DocumentType 是文档类型，@DocumentCode 是输出参数，用于存储生成的文档编码。存储过程的主要功能是...

修改sql语句的错误： create function getid(@xh char(10)) returns @output_table table(@XM varchar(10), @XB varchar(10), @KCH int, @MS varchar(10), @XF int) as begin declare @xm varchar(10),@xb varchar(10),@kch int = 0, @ms varchar(10) = '', @xf int = 0 declare @kcmc varchar(10) , @cj int, @xh char(10) declare cur_score cursor for select 课程表1 .课程名称, 成绩表.期末成绩 from 课程表1 JOIN 成绩表 on 成绩表.课程号 = 课程表1 .课程号 where 成绩表.学号 = @xh open cur_score fetch next from cur_score into @kcmc, @cj while @@FETCH_STATUS = 0 begin if @cj >= 60 begin set @xf = @xf +课程表1.学分 end set @ms = @ms + @kcmc + ',' set @kch = @kch + 1 fetch next from cur_score into @kcmc, @cj end close cur_score deallocate cur_score select @xm = 姓名, @xb = 性别 from 学生表 where 学号 = @xh insert into @output_table values(@xm, @xb, @kch, left(@kcmc, len(@ms) - 1), @xf) return end

declare @kcmc varchar(10) , @cj int, @xh char(10) declare cur_score cursor for select 课程表1.课程名称, 成绩表.期末成绩 from 课程表1 JOIN 成绩表 on 成绩表.课程号 = 课程表1.课程号 where 成绩...

declare li_cur scroll cursor for select nm,f1 from tb3 for update declare @i int,@j int,@sf1 int,@snm varchar(20),@sid varchar(20),@nm varchar(20) set @i=0 open li_cur fetch from li_cur into @sid,@snm while @i<=10 begin set @j=rand()*67+1 fetch absolute @j from li_cur into @snm,@sf1 while @sf1 =1 begin set @j=(@j+1)%67+1 fetch absolute @j from li_cur into @snm,@sf1 end print @nm解读这段代码

这段代码是一个 SQL Server 的游标操作，用于从表 tb3 中选择 nm 和 f1 列，并对其进行更新。首先声明了一个名为 li_cur 的游标，然后定义了一些变量 @i、@j、@sf1、@snm、@sid 和 @nm，并将 @i 的值设置为 0。接着...

create trigger tri_jieshu on reader_borrow for insert as declare @id varchar(50) select @id=borrow_id from inserted update book_borrowing set book_surplus=book_surplus-1 where book_id=@id create trigger tri_huanshu on reader_back for insert as declare @id varchar(50) select @id=back_id from inserted update book_borrowing set book_surplus=book_surplus+1 where book_id=@id create proc payment @id varchar(20),@name varchar(20) as begin select borrow_date,back_date from reader_back,reader_borrow where back_id=borrow_id and back_id=@id and borrow_bookname=back_bookname and (select datediff(day, borrow_date,back_date) FROM reader_back,reader_borrow)>7 end create view view_pay as select * from reader_back,reader_borrow where (borrow_id=back_id and borrow_bookname=back_bookname) create proc proc_pay (@id varchar(20)) as select back_id,back_bookname,back_date,borrow_date from view_pay where back_id=@id exec proc_pay @id='1'该代码有什么语法错误

create proc payment @id varchar(20),@name varchar(20) as begin declare @days int select @days = datediff(day, borrow_date,back_date) FROM reader_back,reader_borrow where back_id=borrow_id and ...

帮忙翻译一下这段SQL：DECLARE @ResourcesID VARCHAR(50) DECLARE @McOwner VARCHAR(50) DECLARE cursorName CURSOR FOR SELECT [ResourcesId],[Attribute1] FROM [MDStandard].[UserData].[Resources] OPEN cursorName FETCH NEXT FROM cursorName INTO @ResourcesID, @McOwner WHILE @@FETCH_STATUS = 0 BEGIN UPDATE [MDStandard].[UserData].[Orders] SET [OrderStatus]= @McOwner WHERE [Resource] =@ResourcesID and [Resource] is not null FETCH NEXT FROM cursorName INTO @ResourcesID, @McOwner END CLOSE cursorName DEALLOCATE cursorName

这段 SQL 是一个带有游标（CURSOR）的脚本，用于更新表中的数据。下面是这段 SQL 的翻译：声明变量 @ResourcesID 和 @McOwner，它们的类型为 VARCHAR(50)。声明名为 cursorName 的游标。在 [MDStandard]....

create trigger on_ssl on ssl instead of update as begin declare @pre_name varchar(15) declare @name varchar(15) select @pre_name=sslname from deleted select @name=sslname from inserted update ss set sslname=@name where sslname=@pre_name update ssl set sslname=@name where sslname=@pre_name end帮我分析这个触发器

这个触发器是在SQL Server数据库中创建的，它是一个在ssl表上的instead of update触发器。当在ssl表中进行更新操作时，该触发器会被激活，执行以下操作：首先，它会从被更新的行中获取sslname的旧值，并将其存储在...

declare @woID int = '32176' /工单号/ declare @startTime datetime='2023-07-14 06:20:51' /查询起始时间/ declare @endTime datetime='2023-07-14 08:20:51' /查询结束时间/ declare @CurDeviceNo varchar(20) = 'P06AOB47' /设备编号/ declare @WoFinishedOrSwitch int /工单是否有完成或者切换/ SELECT TOP 1 @WoFinishedOrSwitch= temp.WOID FROM (SELECT distinct A.WOID,B.DeviceNO FROM [InjectionStation].[dbo].[DefectDetailData] as A inner join [InjectionStation].[dbo].[WorkTable] as B on A.WOID = B.ID where A.NDateTime between @startTime and @endTime) AS temp WHERE temp.DeviceNO=@CurDeviceNo

DECLARE @CurDeviceNo VARCHAR(20) = 'P06AOB47' -- 设备编号 DECLARE @WoFinishedOrSwitch INT -- 工单是否有完成或者切换 SELECT TOP 1 @WoFinishedOrSwitch = temp.WOID FROM ( SELECT DISTINCT A.WOID, B....

CREATE FUNCTION 测试函数(@vsex char(15)) RETURNS varchar(15) AS BEGIN DECLARE @vname varchar(20) SELECT TOP 1 @vname = vname FROM VisitorTable WHERE vsex = @vsex RETURN @vname END我要是想返回所有结果呢

DECLARE @vnames varchar(8000) = '' SELECT @vnames = @vnames + vname + ',' FROM VisitorTable WHERE vsex = @vsex IF LEN(@vnames) > 0 SET @vnames = LEFT(@vnames, LEN(@vnames) - 1) RETURN @vnames END...

解释一下这段代码：delimiter $$ create trigger insert_stu after insert on Student for each row begin declare @cid varchar(30)； select @cid=Cid from inserted； update Class set Cnumber = Cnumber + 1 where Cid = @cid； end; $$ delimiter ;

这段代码是用于创建一个触发器 (trigger)。触发器是一种特殊的数据库对象，可以在数据库表中的数据发生变化时自动执行特定的操作。具体来说，这个触发器的名称是 insert_stu，它会在 Student 表中插入一条记录...

解释一下：CREATE TABLE dbo.OrderNumbers ( OrderNumberID INT IDENTITY(1,1) NOT NULL PRIMARY KEY, OrderNumber VARCHAR(20) NOT NULL, OrderDate DATE NOT NULL ) DECLARE @OrderDate DATE = GETDATE() DECLARE @OrderNumber VARCHAR(20) SET @OrderNumber = 'ORD-' + CONVERT(VARCHAR(10), @OrderDate, 112) + '-' + RIGHT('0000' + CONVERT(VARCHAR(4), IDENT_CURRENT('dbo.OrderNumbers') + 1), 4) INSERT INTO dbo.OrderNumbers (OrderNumber, OrderDate) VALUES (@OrderNumber, @OrderDate) SELECT @OrderNumber AS OrderNumber

这是一个 SQL Server 的代码段，用于创建一个名为 "dbo.OrderNumbers" 的表，该表包含三个列：OrderNumberID、OrderNumber 和 OrderDate。其中，OrderNumberID 是自增的主键，OrderNumber 是一个长度为 20 的非空...

DECLARE @seaKey VARCHAR(100)='30650' SET @seaKey = ''%' + @keyword + '%'' SELECT @seaKey报错：数据类型 varchar 和 varchar 在 modulo 运算符中不兼容。查询条件为：'%keyword%'格式

你需要将查询条件的单引号放在 @seaKey 变量的赋值语句...DECLARE @seaKey VARCHAR(100)='30650' SET @seaKey = '%' + @keyword + '%' SELECT @seaKey 这样，@seaKey 变量将会被赋值为 '%keyword%' 的格式。

ALTER PROCEDURE [dbo].[getHcrStat1580] @wherestr varchar(200), @YMD tinyint AS BEGIN SET NOCOUNT ON; DECLARE @class varchar(200),@grpstr varchar(50),@sql nvarchar(1200),@colstr varchar(400),@table varchar(20) set @table='[NGtbhcr1580]' set @class='class' if @YMD=0 begin set @colstr='rq=YMD,FUR_NO,'+@class set @grpstr=' group by YMD,FUR_NO,class' end else if @YMD=1 begin set @colstr='rq=YM,FUR_NO,'+@class set @grpstr=' group by YM,FUR_NO,class with rollup' end else if @YMD=2 begin set @colstr='rq=YY,FUR_NO,'+@class set @grpstr=' group by YY,FUR_NO,class with rollup' end set @sql='select '+@colstr+'from '+@table+' where YMD between '+@wherestr+@grpstr exec sp_executesql @sql,N'@colstr varchar(400)',@colstr end

这是一个 SQL 存储过程，根据传入的参数 @wherestr 和 @YMD，查询 NGtbhcr1580 表中符合条件的数据，并按照日期、FUR_NO 和 class 进行分组统计。其中，@YMD 参数为 0 时按日统计，为 1 时按月统计，为 2 时按年统计...

create trigger ghxz on GH for insert as declare @rs varchar(8) select @rs=Gh_no from inserted if @rs>=100 begin select * from brst raiserror('挂号人数超过最大限度',16,1); rollback transaction end go优化代码

可以将查询语句中的 ... declare @rs varchar(8) select @rs = Gh_no from inserted if @rs >= 100 begin select top 1 * from brst raiserror('挂号人数超过最大限度', 16, 1) rollback end end go

create trigger zu on zhusu after update as begin if object_id(N'z',N'U') is null create table z(sno varchar(15),sslname varchar(15),ssid varchar(4),cw smallint); declare @pre_sno varchar(15) declare @pre_name varchar(15) declare @pre_ssid varchar(4) declare @pre_cw smallint select @pre_sno = sno from deleted select @pre_name =sslname from deleted select @pre_ssid =ssid from deleted select @pre_cw =cw from deleted insert into z(sno,sslname,ssid,cw) values(@pre_sno,@pre_name,@pre_ssid,@pre_cw) end帮我分析触发器

这个触发器是在SQL Server数据库中创建的，它是一个在zhusu表上的after update触发器。当在zhusu表中进行更新操作时，该触发器会被激活，执行以下操作：首先，它会检查名为z的表是否存在，如果不存在，则创建一个...

create trigger jcxz on JC for insert as declare @rs varchar(8) select @rs=Jc_no from inserted if @rs>=100 begin raiserror('检查人数超过最大限度',16,1); rollback transaction end go改成mysql命令行语法

DECLARE rs VARCHAR(8); SELECT Jc_no INTO rs FROM JC WHERE Jc_no = NEW.Jc_no; IF rs >= 100 THEN SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = '检查人数超过最大限度'; ROLLBACK; END IF; END // ...

declare @ctype varchar declare @cname varchar use stu_cou create procedure @ctype varchar(20) @cname varchar(20) as begin select Cno,Cname,Ctype,Ccredit from Course where Ctype = @ctype and charindex (@cname,Cname)>0 end

create trigger tr_insert on takes for insert as declare @sno varchar(5) declare @cno varchar(5) declare @credit numeric(3,0) select @sno=ID,@cno=course_id from inserted select @credit=credits from course where course_id=@cno update student set tot_cred=tot_cred+@credit where ID=@sno go

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declare @ctype varchar declare @cname varchar use stu_cou create procedure @ctype varchar(20) @cname varchar(20) as begin select Cno,Cname,Ctype,Ccredit from Course where Ctype = @ctype and charindex (@cname,Cname)>0 end

create trigger tr_insert on takes for insert as declare @sno varchar(5) declare @cno varchar(5) declare @credit numeric(3,0) select @sno=ID,@cno=course_id from inserted select @credit=credits from course where course_id=@cno update student set tot_cred=tot_cred+@credit where ID=@sno go

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CREATE FUNCTION 测试函数(@vsex char(15)) RETURNS varchar(15) AS BEGIN DECLARE @vname varchar(20) SELECT TOP 1 @vname = vname FROM VisitorTable WHERE vsex = @vsex RETURN @vname END我要是想返回所有结果呢

解释一下这段代码：delimiter $$ create trigger insert_stu after insert on Student for each row begin declare @cid varchar(30)； select @cid=Cid from inserted； update Class set Cnumber = Cnumber + 1 where Cid = @cid； end; $$ delimiter ;

DECLARE @seaKey VARCHAR(100)='30650' SET @seaKey = ''%' + @keyword + '%'' SELECT @seaKey报错：数据类型 varchar 和 varchar 在 modulo 运算符中不兼容。查询条件为：'%keyword%'格式

create trigger ghxz on GH for insert as declare @rs varchar(8) select @rs=Gh_no from inserted if @rs>=100 begin select * from brst raiserror('挂号人数超过最大限度',16,1); rollback transaction end go优化代码

create trigger jcxz on JC for insert as declare @rs varchar(8) select @rs=Jc_no from inserted if @rs>=100 begin raiserror('检查人数超过最大限度',16,1); rollback transaction end go改成mysql命令行语法

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