Question

我有以下观点：

use strict; 
use warnings; 

my $str="     a, b,    c>d:e,  f,    g ";
$str =~ s/\s+//g; # remove all occurrences of 1 or more spaces
my @columns = split(/,/, $str);
print join(',', @columns), "\n";

基表具有以下信息：

ZTB_OPPMATT_BP：145000行
tb_opportunity_list_prod：46000行
tb_user_list_prod：120000行

如果我尝试在sql server中执行此视图，则需要大约16-20秒才能完成150.000行（现在，将来会增加）。

如何提高视图效果？

我读到了索引视图，但基表不是静态的，因此在创建新用户/机会/任何时候放置必须更新的索引似乎很危险。此外，我无法修改基表，只需阅读它们。

感谢您提供的任何帮助。

由于

Answer 1

您可以尝试在没有子查询的情况下构建视图：

SELECT   [OPER_ID] as IdOpportunity,
         CASE WHEN LEN(partner_no) = 10 THEN u1.shortname ELSE partner_no END as ShortName, 
         o.CASETITLE as OpportunityDesc,
         o.CLIENTSOLICID as IdClientSolic, 
         o.CLIENTSOLICNAME as ClientSolicDesc,
         u.shortname as IdSocResp, 
         u.NAME + ' ' + u.Lastname_1 + ' ' + u.lastname_2 as SocRespName,
         o.GROUPADMID as IdGroupAdm,
         o.GROUPADMDESC as GroupAdmDesc, 
         o.OFFICEID as IdOffice, 
         o.OFFICEDESCRIPTION as OfficeDesc, 
         o.AREAID as IdArea, 
         o.AREADESC as AreaDesc,
         o.TYPEOPERATION as OperationType
FROM [SAP].[dbo].[ZTB_OPPMATT_BP]
INNER JOIN [SAP].dbo.tb_opportunity_list_prod o 
    ON o.OPPORTUNITYID = [oper_id]
INNER JOIN [SAP].[dbo].[tb_user_list_prod] u 
    ON u.empid = SUBSTRING(o.[LEADINGID], 3, LEN(o.[LEADINGID]))
LEFT JOIN [SAP].dbo.tb_user_list_prod u1
    ON u1.empid = right(partner_no, 8) AND year(u1.enddate) = 9999
WHERE partner_fct IN ('ZCREA','Z6','Z2','ZLEAD','00000014','00000032') 
        AND PROCESS_TYPE IN ('ZOSE','ZOPB','ZOPP')
        AND (CASE WHEN LEN(partner_no) = 10 THEN u1.shortname ELSE partner_no END) NOT IN ('','-')

提高SQL Server中的视图性能

1 个答案: