CASE
ステートメントを使用して一部をクリーンアップすることを考えましたが、現在は約 10 秒で実行されます。冗長なコード呼び出しだけでなく、それを凝縮しようとしています。よりも良い方法があるかどうか疑問に思っていCASE
ます。
3 つの個別のコード ブロックがあります。各ブロックは、キューに入っている日数に応じて色を割り当てる以外は、ほぼ同じことを行います。
緑 1 日未満のもの。1 日以上 3 日未満のものを黄色にします。3 日を超えるものは赤色。
select m.number, 'status1', 'Green', datediff(day, (select max(datechanged) from statushistory where accountid = m.number), getdate())
from master m with (nolock)
inner join customer c with (nolock) on m.customer = c.customer
where m.status = 'status1'
and datediff(day, (select max(sh.datechanged) from statushistory sh where accountid = m.number), getdate()) <= 1
and qlevel < 998
and (m.desk not like 'ATY%')
and (isnull(m.link,0) = 0 or m.linkdriver = 1)
and m.desk not in ('param1','param2','param3','param4','param5','param6','param7','param8','param9','param10','param11','param12')
select m.number, 'status1', 'Yellow', datediff(day, (select max(datechanged) from statushistory where accountid = m.number), getdate())
from master m with (nolock)
inner join customer c with (nolock) on m.customer = c.customer
where m.status = 'status1'
and datediff(day, (select max(sh.datechanged) from statushistory sh where accountid = m.number), getdate()) between 1 and 2
and qlevel < 998
and (m.desk not like 'ATY%')
and (isnull(m.link,0) = 0 or m.linkdriver = 1)
and m.desk not in ('param1','param2','param3','param4','param5','param6','param7','param8','param9','param10','param11','param12')
select m.number, 'status1', 'Red', datediff(day, (select max(datechanged) from statushistory where accountid = m.number), getdate())
from master m with (nolock)
inner join customer c with (nolock) on m.customer = c.customer
where m.status = 'status1'
and datediff(day, (select max(sh.datechanged) from statushistory sh where accountid = m.number), getdate()) >= 3
and qlevel < 998
and (m.desk not like 'ATY%')
and (isnull(m.link,0) = 0 or m.linkdriver = 1)
and m.desk not in ('param1','param2','param3','param4','param5','param6','param7','param8','param9','param10','param11','param12')
編集#1
select m.number, 'status1',
CASE
WHEN datediff(day, (select max(sh.datechanged) from statushistory sh where accountid = m.number), getdate()) <= 1 THEN 'Green'
WHEN datediff(day, (select max(sh.datechanged) from statushistory sh where accountid = m.number), getdate()) between 1 and 3 THEN 'Yellow'
WHEN datediff(day, (select max(sh.datechanged) from statushistory sh where accountid = m.number), getdate()) > 3 THEN 'Red'
END
, datediff(day, (select max(datechanged) from statushistory where accountid = m.number), getdate())
from master m with (nolock)
inner join customer c with (nolock) on m.customer = c.customer
where m.status = 'status1'
--and datediff(day, (select max(sh.datechanged) from statushistory sh where accountid = m.number), getdate()) <= 1
and qlevel < 998
and (m.desk not like 'ATY%')
and (isnull(m.link,0) = 0 or m.linkdriver = 1)
and m.desk not in ('param','param','param','param','param','param','param','param','param','param','param','param')