我有一张像这样的表[POSTGRE] ......
- 接听电话的代理人，
- 电话号码
- 日期时间结束。
Agent | Caller | DateTime
------------------------------------
101 | 555-1234 | 12-01-16 00:00
101 | 555-1234 | 12-01-16 01:00
102 | 555-1234 | 12-01-16 02:00
102 | 555-1234 | 13-01-16 06:00
1º - 我需要验证每个号码（每一行）..并在通话前24小时查看，以检查是否是召回，例如：第13天没有召回，因为此号码的最后一次通话不是在24小时内
2º - 需要召回代理人。
需要像这样显示......
Agent | Caller | DateTime | Recalling | Recalling-From
----------------------------------------------------------------------
101 | 555-1234 | 12-01-16 00:00 | NO |
101 | 555-1234 | 12-01-16 01:00 | YES | 101
102 | 555-1234 | 12-01-16 02:00 | YES | 101
102 | 555-1234 | 13-01-16 06:00 | NO |
我的查询是......
SELECT
to_char(datahora_entrada_fila, 'DD/MM/YYYY') as dia,
calleridnum As numero,
MAX(datahora_inicio) AS data_ini
FROM callcenter.chamada_fila_in cfin
WHERE datahora_inicio BETWEEN '2016-12-01 00:00:00' AND '2016-12-01 23:59:59'
AND status_chamada = 'Finalizada'
GROUP BY dia,numero
)
SELECT
to_char(datahora_entrada_fila, 'DD/MM/YYYY') as dia,
(SELECT count(calleridnum) FROM callcenter.chamada_fila_in f INNER JOIN maiordata md ON f.calleridnum = md.numero WHERE calleridnum = cfin.calleridnum AND datahora_inicio BETWEEN md.data_ini - interval '24 hours' AND md.data_ini ) AS QtdRechamada,
calleridnum As numero
FROM callcenter.chamada_fila_in cfin
WHERE datahora_inicio BETWEEN '2016-12-01 00:00:00' AND '2016-12-01 23:59:59'
AND status_chamada = 'Finalizada'
GROUP BY dia,numero
ORDER BY
dia,numero DESC
需要更好的功能或方法.. 这个查询在我的数据库中非常繁重，需要进行优化。