Javascript 如何对多个条件的多列求和并在一个条件中显示
我有一个这样的表,现在我需要通过tpi获取所有数据组Javascript 如何对多个条件的多列求和并在一个条件中显示,javascript,mysql,sql,node.js,Javascript,Mysql,Sql,Node.js,我有一个这样的表,现在我需要通过tpi获取所有数据组 +---------------------+---------+----------------+ | trxDate | trxType | tpi | +---------------------+---------+----------------+ | 2018-06-28 00:00:00 | Sent | SI0005 | | 2018-07-02 00:00:
+---------------------+---------+----------------+
| trxDate | trxType | tpi |
+---------------------+---------+----------------+
| 2018-06-28 00:00:00 | Sent | SI0005 |
| 2018-07-02 00:00:00 | Sent | SI0005 |
| 2018-07-04 00:00:00 | Sent | SI0005 |
| 2018-05-25 00:00:00 | Open | SI0007 |
| 2018-06-26 00:00:00 | Open | SI0007 |
| 2018-05-25 00:00:00 | Sent | SI0007 |
| 2018-06-23 00:00:00 | Sent | SI0007 |
+---------------------+---------+----------------+
我需要打开和发送的记录
+---------------------+---------+----------------+
| tpi | open | sent |
+---------------------+---------+----------------+
| SI0005 | 0 | 3 |
| SI0007 | 2 | 2 |
+---------------------+---------+----------------+
我尝试了一些子查询,但没有得到想要的响应
SELECT tblcount.tpi, tblcount.qType, count(tblcount.id) total FROM (SELECT id, tpi, 'Open' qType FROM `tbl`WHERE trxType = 'Open' UNION SELECT id, tpi, 'Sent' qType FROM `tbl` WHERE trxType = 'Sent') tblcount GROUP BY tblcount.third_party_id, tblcount.qType
您可以执行条件聚合:
select tpi,
sum(trxType = 'Open') as trxType_open,
sum(trxType = 'Sent') as trxType_Sent
from tbl t
group by tpi;
您可以执行条件聚合:
select tpi,
sum(trxType = 'Open') as trxType_open,
sum(trxType = 'Sent') as trxType_Sent
from tbl t
group by tpi;
只需使用条件聚合:
select tpi,
sum( (trx_type = 'open') ) as num_open,
sum( (trx_type = 'sent') ) as num_sent
from tbl
group by tpi;
这使用了一个MySQL扩展,该扩展将布尔表达式视为整数上下文中的整数,其中“1”表示true,“0”表示false。只需使用条件聚合:
select tpi,
sum( (trx_type = 'open') ) as num_open,
sum( (trx_type = 'sent') ) as num_sent
from tbl
group by tpi;
这使用了一个MySQL扩展,该扩展将布尔表达式视为整数上下文中的整数,其中“1”表示true,“0”表示false