在 postgreSQL 9.6 中工作:
我有许多选择语句,每个语句都输出一行
例如选择 8 作为“ColA”,选择 20 作为“ColB”,选择 13 作为“ColC”
我需要将它们放入一个数组中,例如:
["ColA",8],["ColB",20],["ColC",13]
我已经尝试了很多种 row_to_json、array_to_json 等,但没有任何乐趣,有人可以帮忙吗?
我尝试过的实际代码比上面描述的要复杂一些,但数据的结构不是......这是我现有的代码(只是为了表明我有
SELECT "JobTitle" "name",
(
select array_to_json(array_agg(row_to_json(d2))) from
(SELECT
(select row_to_json(d2_1) from (select SUM(CASE WHEN "StartDateTime"<(_Date_For + '1 hour'::interval) AND "EndDateTime">(_Date_For) THEN "Effect" ELSE 0 END) "00:00" from "tmpDashboardData" where "JobTitle"=x."JobTitle") d2_1)
UNION ALL
(select row_to_json(d2_10) from (select SUM(CASE WHEN "StartDateTime"<(_Date_For + '11 hour'::interval) AND "EndDateTime">(_Date_For + '10 hour'::interval) THEN "Effect" ELSE 0 END) "10:00" from "tmpDashboardData" where "JobTitle"=x."JobTitle") d2_10)
UNION ALL
(select row_to_json(d2_11) from (select SUM(CASE WHEN "StartDateTime"<(_Date_For + '12 hour'::interval) AND "EndDateTime">(_Date_For + '11 hour'::interval) THEN "Effect" ELSE 0 END) "11:00" from "tmpDashboardData" where "JobTitle"=x."JobTitle") d2_11)
) d2
) as "data"
FROM "tmpDashboardData" x GROUP BY "JobTitle"