我有一個帶有汽車表的資料庫，該表有許多不同的列。我需要輸出按每輛車的品牌排序的表格中的內容，每個品牌中只有三輛車需要與每排車的總數一起輸出。我還需要使輸出按降序排列，并附有一個名為 Ranking 的列，該列從 1 開始計數，無論有多少輸出。
以下是我的資料庫表中的示例
|Timestamp |Email |Name |Year|Make |Model |Car_ID|Judge_ID|Judge_Name|Racer_Turbo|Racer_Supercharged|Racer_Performance|Racer_Horsepower|Car_Overall|Engine_Modifications|Engine_Performance|Engine_Chrome|Engine_Detailing|Engine_Cleanliness|Body_Frame_Undercarriage|Body_Frame_Suspension|Body_Frame_Chrome|Body_Frame_Detailing|Body_Frame_Cleanliness|Mods_Paint|Mods_Body|Mods_Wrap|Mods_Rims|Mods_Interior|Mods_Other|Mods_ICE|Mods_Aftermarket|Mods_WIP|Mods_Overall|
|--------------|-------------------------|----------|----|--------|---------|------|--------|----------|-----------|------------------|-----------------|----------------|-----------|--------------------|------------------|-------------|----------------|------------------|------------------------|---------------------|-----------------|--------------------|----------------------|----------|---------|---------|---------|-------------|----------|--------|----------------|--------|------------|
|8/5/2018 14:10|honoland13@japanpost.jp |Hernando |2015|Acura |TLX |48 |J04 |Bob |0 |0 |2 |2 |4 |4 |0 |2 |4 |4 |2 |4 |2 |2 |2 |2 |2 |0 |4 |4 |4 |6 |2 |0 |4 |
|8/5/2018 15:11|nlighterness2q@umn.edu |Noel |2015|Jeep |Wrangler |124 |J02 |Carl |0 |6 |4 |2 |4 |6 |6 |4 |4 |4 |6 |6 |6 |6 |6 |4 |6 |6 |6 |6 |6 |4 |6 |4 |6 |
|8/5/2018 17:10|eguest47@microsoft.com |Edan |2015|Lexus |Is250 |222 |J05 |Adrian |0 |0 |0 |0 |0 |0 |0 |0 |6 |6 |6 |0 |0 |6 |6 |6 |0 |0 |0 |0 |0 |0 |0 |0 |4 |
|8/5/2018 17:34|hchilley40@fema.gov |Hieronymus|1993|Honda |Civic eG |207 |J06 |Aaron |0 |0 |2 |2 |2 |2 |2 |2 |0 |4 |2 |2 |2 |2 |2 |2 |4 |2 |2 |0 |0 |0 |2 |2 |0 |
|8/5/2018 14:30|nnowick3d@tuttocitta.it |Nickolas |2016|Ford |Mystang |167 |J02 |Carl |0 |0 |2 |2 |0 |2 |2 |0 |0 |0 |0 |2 |0 |2 |2 |2 |0 |0 |2 |0 |0 |0 |0 |0 |2 |
|8/5/2018 16:12|mdearl39@amazon.co.uk |Martin |2013|Hyundai |Gen coupe|159 |J04 |Bob |0 |0 |2 |0 |0 |0 |2 |0 |0 |0 |0 |2 |0 |2 |2 |0 |2 |0 |2 |0 |0 |0 |0 |0 |0 |
|8/5/2018 17:00|alynamg@blogtalkradio.com|Aldridge |2009|Infiniti|G37 |20 |J06 |Aaron |2 |0 |2 |2 |0 |0 |2 |0 |0 |2 |2 |2 |2 |2 |2 |2 |2 |2 |4 |2 |2 |0 |2 |0 |2 |
|8/5/2018 16:11|abowton3k@spiegel.de |Ambros |2009|Honda |Oddesy |178 |J06 |Aaron |2 |0 |2 |2 |2 |2 |2 |0 |4 |4 |2 |2 |2 |4 |4 |4 |2 |2 | |6 |4 |4 |6 |4 |6 |
|8/5/2018 17:29|qesterbrookn@bandcamp.com|Quincy |2012|Hyundai |Celoster |30 |J04 |Bob |0 |0 |2 |2 |2 |2 |2 |4 |6 |6 |4 |2 |4 |4 |6 |6 |4 |0 |2 |0 |0 |0 |2 |2 |4 |
預期的輸出如下所示
|Ranking |Car_ID|Year |Make |Model |Total|
|--------|------|-------|------|-----------|-----|
|1 |48 |2015 |Acura |TLX |89 |
|2 |66 |2012 |Acura |MDX |75 |
|3 |101 |2022 |Acura |TLX |70 |
|4 |22 |2011 |Chevy |Camaro |112 |
|5 |40 |2015 |Chevy |Corvette |99 |
|6 |205 |2022 |Chevy |Corvette |66 |
|7 |111 |2006 |Ford |Mustang |94 |
|8 |97 |2003 |Ford |GT |88 |
|9 |71 |2008 |Ford |Fiesta ST |80 |
這是我已經能夠組合在一起的命令，它的功能與我需要的類似，但我不知道如何通過從總數降序來進行排名列和排序。
SELECT Car_ID, Year, Make, Model, Racer_Turbo Racer_Supercharged ... Mods_Overall FROM Carstable order by Make limit 3;
這個查詢命令只回傳三個結果而不是全部，我也不知道在命令中放置 DESC 關鍵字的位置，以便根據總列按降序列出它們，或者如何做排名列. 有任何想法嗎？
uj5u.com熱心網友回復：
使用 CTE 回傳每行的列，并使用視窗函式Total為每行選擇前 3 行并創建列：ROW_NUMBER()MakeRanking
WITH cte AS (
SELECT *,
Racer_Turbo Racer_Supercharged Racer_Performance Racer_Horsepower
Car_Overall
Engine_Modifications Engine_Performance Engine_Chrome Engine_Detailing Engine_Cleanliness
Body_Frame_Undercarriage Body_Frame_Suspension Body_Frame_Chrome Body_Frame_Detailing Body_Frame_Cleanliness
Mods_Paint Mods_Body Mods_Wrap Mods_Rims Mods_Interior Mods_Other Mods_ICE Mods_Aftermarket Mods_WIP Mods_Overall Total
FROM carstable
)
SELECT ROW_NUMBER() OVER (ORDER BY Make, Total DESC) Ranking,
Car_ID, Year, Make, Model, Total
FROM (SELECT *, ROW_NUMBER() OVER (PARTITION BY Make ORDER BY Total) rn FROM cte)
WHERE rn <= 3
ORDER BY Make, Total DESC;
請參閱演示。
轉載請註明出處，本文鏈接：https://www.uj5u.com/qita/442100.html
標籤：sqlite sql-order-by 公共表表达式 窗函数
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