如何批量更新？

Question

我已經寫了下面的查詢選擇了多項紀錄：

select  
    b.building_name , 
    lp.lease_id , 
    lp.suite_id , 
    lp.suite_name , 
    lp.tenant_trading_name , 
    sco.scca_uplift as 'Current GST Uplift Jan 2011' , 
    nu.new_uplift as 'GST Uplift Jan 2011 Post-Change' , 
    lp.scca_broad_category_code , 
    lp.scca_sales_group_code , 
    lp.scca_fine_categories_code , 
    lp.scca_notes_code 
    , '(lease_id = ''' + lp.lease_id + ''' and suite_id =''' 
     + lp.suite_id + ''') or' as 'Base SQL Output' 
from   
    property.lease_period lp 
     inner join property.property b 
      on b.building_id = lp.building_id 
     inner join 
     (
      select scca_uplift , 
        scca_broad_category_code , 
        scca_fine_categories_code , 
        scca_sales_group_code 
      from property.lease_period 
      where period_id = 252 
     ) sco 
      on sco.scca_broad_category_code = lp.scca_broad_category_code 
       and sco.scca_sales_group_code = lp.scca_sales_group_code 
       and sco.scca_fine_categories_code = lp.scca_fine_categories_code 

     inner join 
     (
      -- Department Store 
      select '10' as scca_broad_category_code, 
      '100'  as scca_sales_group_code, 
      '1000'  as scca_fine_categories_code, 
      109.8  as new_uplift 
      -- Discount Department Stores 
      union all 
      select '10' as scca_broad_category_code, 
      '110'  as scca_sales_group_code, 
      '1100'  as scca_fine_categories_code, 
      109.5  as new_uplift 
      -- Supermarket 
      union all 
      select '10' as scca_broad_category_code, 
      '130'  as scca_sales_group_code, 
      '1300'  as scca_fine_categories_code, 
      105.0  as new_uplift 
      -- Newsagents and Stationary 
      union all 
      select '30' as scca_broad_category_code, 
      '340'  as scca_sales_group_code, 
      '3403'  as scca_fine_categories_code, 
      110.0  as new_uplift 
      -- Discount Variety 
      union all 
      select '30' as scca_broad_category_code, 
      '350'  as scca_sales_group_code, 
      '3502'  as scca_fine_categories_code, 
      109.5  as new_uplift 
      -- Optometrist 
      union all 
      select '30' as scca_broad_category_code, 
      '380'  as scca_sales_group_code, 
      '3801'  as scca_fine_categories_code, 
      110.0  as new_uplift 

     ) nu 
      on  nu.scca_broad_category_code = lp.scca_broad_category_code 
        and nu.scca_sales_group_code = lp.scca_sales_group_code 
        and nu.scca_fine_categories_code = lp.scca_fine_categories_code 
where 
    (
     -- Department Store 
     ( lp.scca_broad_category_code = '10' and 
      lp.scca_sales_group_code = '100' and 
      lp.scca_fine_categories_code = '1000' and 
      lp.scca_notes_code in ('10001', '10002')) 
     -- Discount Department Store 
     or 
     ( lp.scca_broad_category_code = '10' and 
      lp.scca_sales_group_code = '110' and 
      lp.scca_fine_categories_code = '1100' and 
      lp.scca_notes_code in ('11001', '11002', '11003', '11004')) 
     -- Supermarket 
     or 
     ( lp.scca_broad_category_code = '10' and 
      lp.scca_sales_group_code = '130' and 
      lp.scca_fine_categories_code = '1300' and 
      lp.scca_notes_code in ('13001', '13002', '13003', '13004', '13005', 
            '13006', '13007', '13007', 
            '13008', '13009', '13010', '13011', '13012', 
            '13013', '13014')) 
     -- Newsagents and Stationary 
     or 
     ( lp.scca_broad_category_code = '30' and 
      lp.scca_sales_group_code = '340' and 
      lp.scca_fine_categories_code = '3403') 
     -- Discount Variety 
     or 
     ( lp.scca_broad_category_code = '30' and 
      lp.scca_sales_group_code = '350' and 
      lp.scca_fine_categories_code = '3502') 
     -- Optometrist 
     or 
     ( lp.scca_broad_category_code = '30' and 
      lp.scca_sales_group_code = '380' and 
      lp.scca_fine_categories_code = '3801') 

    ) 
    and  b.building_id <> 42000 
    and  lp.scca_uplift is not null 
    and  lp.period_id >= 252 
order by  
    b.building_name , 
    scca_broad_category_code , 
    scca_sales_group_code , 
    scca_fine_categories_code , 
    scca_notes_code 

我想什麼現在要做的就是編寫一個查詢，將採取nu.new_uplift列，並將其應用到每一行它現在正在顯示它現在顯示的值（混淆的句子，請讓我知道如果我應該以不同的方式解釋）。我以爲我可以通過使用CTE來做到這一點，但我不相信這是可能的，因爲我使用子查詢來進行連接。考慮到這一點 - 我應該在這裏使用什麼？

Answer 1

從非常廣義的角度來看，UPDATE... from...應該在這裏工作。一種可能的模板：

UPDATE TableName 
set ColName = Alias2.OtherColName 
from TableName Alias1 
    inner join OtherTableName Alias2 
    on JoinCriteria 
where FilteringCriteria 

與SELECT語句一樣，「OtherTableName」可以用大多數任何表os子查詢替換。

在這裏，我將挑出要更新的表，將它作爲第一個列在「from」子句中，然後將它適當地加入到將成爲怪物子查詢（不含ORDER BY子句）的內容中。

Answer 2

我用下面以應用此更改（發佈於利益的緣故），但菲利普公司發佈的做法要好得多：

begin transaction 

update property.lease_period 
set  scca_uplift = 
        (
         case 
          when -- Department Store 
           (
            scca_notes_code in ('10001', '10002') and 
            scca_broad_category_code = '10' and 
            scca_sales_group_code = '100' and 
            scca_fine_categories_code = '1000' 
           ) 
          then '109.8' 
          when -- Discount Department Store 
           (
            scca_notes_code in ('11001', '11002', '11003', '11004') and 
            scca_broad_category_code = '10' and 
            scca_sales_group_code = '110' and 
            scca_fine_categories_code = '1100' 
           ) 
          then '109.5' 
          when -- Supermarket 
           (
            scca_notes_code in ( '13001', '13002', '13003', '13004', '13005', 
                  '13006', '13007', '13007', 
                  '13008', '13009', '13010', '13011', '13012', 
                  '13013', '13014') and 
            scca_broad_category_code = '10' and 
            scca_sales_group_code = '130' and 
            scca_fine_categories_code = '1300' 
           ) 
          then '105.0' 
          when -- Newsagents and Stationary 
           (
            scca_broad_category_code = '30' and 
            scca_sales_group_code = '340' and 
            scca_fine_categories_code = '3403' 
           ) 
          then '110.0' 
          when -- Discount Variety 
           (
            scca_broad_category_code = '30' and 
            scca_sales_group_code = '350' and 
            scca_fine_categories_code = '3502' 
           ) 
          then '109.5' 
          when -- Optometrist 
           (
            scca_broad_category_code = '30' and 
            scca_sales_group_code = '380' and 
            scca_fine_categories_code = '3801' 
           ) 
          then '110.0' 
         end 
        ) 
where 
    period_id >= 252 and 
    building_id <> 42000 and 
    scca_uplift is not null 

rollback transaction