如何使用不同的where子句检索多列计数？

Question

I need to construct the following table.

 <style type="text/css"> .tg {border-collapse:collapse;border-spacing:0;} .tg td{font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;} .tg th{font-family:Arial, sans-serif;font-size:14px;font-weight:normal;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;} .tg .tg-baqh{text-align:center;vertical-align:top} .tg .tg-lap0{font-size:100%;text-align:center;vertical-align:top} .tg .tg-yw4l{vertical-align:top} </style> <table class="tg" style="undefined;table-layout: fixed; width: 593px"> <colgroup> <col style="width: 67px"> <col style="width: 72px"> <col style="width: 116px"> <col style="width: 116px"> <col style="width: 116px"> <col style="width: 106px"> </colgroup> <tr> <th class="tg-lap0">State</th> <th class="tg-baqh">City</th> <th class="tg-baqh">Three Days Ago</th> <th class="tg-baqh">Two Days Ago</th> <th class="tg-baqh">One Day Ago</th> <th class="tg-baqh">Total</th> </tr> <tr> <td class="tg-yw4l"></td> <td class="tg-yw4l"></td> <td class="tg-yw4l"></td> <td class="tg-yw4l"></td> <td class="tg-yw4l"></td> <td class="tg-yw4l"></td> </tr> <tr> <td class="tg-yw4l"></td> <td class="tg-yw4l"></td> <td class="tg-yw4l"></td> <td class="tg-yw4l"></td> <td class="tg-yw4l"></td> <td class="tg-yw4l"></td> </tr> <tr> <td class="tg-yw4l"></td> <td class="tg-yw4l"></td> <td class="tg-yw4l"></td> <td class="tg-yw4l"></td> <td class="tg-yw4l"></td> <td class="tg-yw4l"></td> </tr> <tr> <td class="tg-yw4l"></td> <td class="tg-yw4l"></td> <td class="tg-yw4l"></td> <td class="tg-yw4l"></td> <td class="tg-yw4l"></td> <td class="tg-yw4l"></td> </tr> </table> 

Where state and city are simple selects, but three_days_ago, two_days_ago, one_day_ago are count of DB entries for the same city name. All this is in same table in DB.

So I image my query like something like this:

$union = pg_query($db, 
"
(
SELECT estado, municipio, COUNT(*)
FROM focos_bdq 
WHERE bioma LIKE 'Amazônia'
AND satelite LIKE 'AQUA_M-T' 
AND data_hora_gmt::date='$three_days_ago'
GROUP BY municipio, estado
ORDER BY COUNT(*) DESC 
)
UNION ALL
(
SELECT estado, municipio, COUNT(*)
FROM focos_bdq 
WHERE bioma LIKE 'Amazônia' 
AND data_hora_gmt::date='$two_days_ago'
GROUP BY municipio, estado
ORDER BY COUNT(*) DESC 
)
UNION ALL
(
SELECT estado, municipio, COUNT(*)
FROM focos_bdq 
WHERE bioma LIKE 'Amazônia' 
AND data_hora_gmt::date='$one_day_ago'
GROUP BY municipio, estado
ORDER BY COUNT(*) DESC 
)
"

But this query is resulting in one very long table, when I need to put dates in same row.

Answer 1

hard to tell without actual data, something like this should do the trick:

with 
3d as (
SELECT estado, municipio, COUNT(*)
FROM focos_bdq 
WHERE bioma LIKE 'Amazônia'
AND satelite LIKE 'AQUA_M-T' 
AND data_hora_gmt::date='$three_days_ago'
GROUP BY municipio, estado
ORDER BY COUNT(*) DESC 
)
, 2d as (
SELECT estado, municipio, COUNT(*)
FROM focos_bdq 
WHERE bioma LIKE 'Amazônia' 
AND data_hora_gmt::date='$two_days_ago'
GROUP BY municipio, estado
ORDER BY COUNT(*) DESC 
)
, 1d as (
SELECT estado, municipio, COUNT(*)
FROM focos_bdq 
WHERE bioma LIKE 'Amazônia' 
AND data_hora_gmt::date='$one_day_ago'
GROUP BY municipio, estado
ORDER BY COUNT(*) DESC 
)
select estado, municipio, d3.count,d2.count,d1.count,d3.count+d2.count+d1.count
from d3
left outer join d2 on d3.estado = d2.estado and d3.municipio = d2.municipio
left outer join d1 on d1.estado = d2.estado and d1.municipio = d2.municipio