laravel在groupBy之后使用计数/求和方法 [英] laravel use count/sum method after groupBy
问题描述
当我使用 count
或 sum
方法时,我得到了错误的结果.
When I use count
or sum
method, I get the wrong result.
例如:
Member::groupBy('id')->count()
在另一种方法下,我只得到结果1
I only get result 1, in another method
Member::count()
我得到正确的结果.
使用 sum
方法时得到错误的结果.
I get wrong result when use sum
method.
https://github.com/laravel/framework/issues/14123
忘记说了,我的laravel版本信息:
Forgot to say, My laravel version info:
Laravel Framework version 5.1.40 (LTS)
项目中的实际问题
我有一个充电日志表.
1.pay日志表
CREATE TABLE pay_logs (
id int(11) NOT NULL AUTO_INCREMENT,
amount decimal(20,2) DEFAULT '0.00',
pay_sn varchar(20) DEFAULT NULL,
join_date int(11) unsigned DEFAULT '0',
PRIMARY KEY (id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
1.1支付记录表数据
INSERT INTO pay_logs (id, amount, pay_sn, join_date)
VALUES
(1,10.00,'aabbcc',1466753291),
(2,10.00,'aabbcc',1466753292),
(3,20.00,'bbccdd',1466753292),
(4,30.00,'ccddee',1466753292);
2.description
2.description
在pay_log表中,1和2记录相同.因此,当要按实际充电成功时间过滤结果时,我只需要一条记录,因此我使用groupBy操作.
In pay_log table, the 1 and 2 record is same. So when wants to filter the results by the actually recharge success time, I just need one record, so I use groupBy operation.
我的错误操作
DB::table('pay_log')
->whereBetween('joinDate',[$beginToday,$endToday])
->where('isSucceed','=',1)
->where('type','=',1)
->groupBy('pay_sn');
->count();
最后,解决它.
$query = DB::table('pay_log')
->select(DB::raw('count(*) as num'))
->whereBetween('joinDate',[$beginToday,$endToday])
->where('isSucceed','=',1)
->where('type','=',1)
->groupBy('pay_sn');
ps:如果使用雄辩的ORM
ps: if use Eloquent ORM
将-> mergeBindings($ query)
修改为-> mergeBindings($ query-> getQuery())
测试示例(放弃)
Test Example(discard)
-
创建表sql
create table sql
CREATE TABLE成员(id int(11)NOT NULL AUTO_INCREMENT,名称varchar(15)DEFAULT NULL,十进制金额(20,2)默认值'0.00',主键(id))ENGINE = InnoDB AUTO_INCREMENT = 4 DEFAULT CHARSET = utf8;
测试数据
INSERT INTO hc_members(id,名称,金额)VALUES(1,'aaa',10.00),(2,'bbb',10.00),(3,'ccc',10.00);
测试结果
希望,当我使用方法 Member :: groupBy('name')-> count()
我想要结果3
实际上它返回1 .
当我使用方法 Member :: groupBy('name')-> sum('amount')
我要结果30.00
实际上它返回10.00
感谢您的回答以帮助我解决问题!
推荐答案
这不是laravel的问题,因为 Member :: groupBy('id')-> count()
将返回计数每个ID的结果数.(Laravel仅返回查询结果的第一行.)
That's not an issue with laravel because Member::groupBy('id')->count()
will return the count of number of results for each id. (Laravel is returning only the first row from the query result.)
尝试运行此查询
SELECT COUNT(*) AS aggregate FROM members GROUP BY 'id'
它将返回每个(id)聚合的行数计数.这是当您调用 Member :: groupBy('id')-> count()
并且laravel仅期待一行返回第一个集合的计数时执行的查询.
It will return a count of the number of rows for each (id) aggregate. This is the query executed when you call Member::groupBy('id')->count()
and laravel, expecting only one row, returns the count of the first aggregate.
如果您要计算不同的ID,可以致电
If you want a count of the distinct ids, you can call
Member::distinct('id')->count('id')
与您的总和查询也返回10的原因相同.该查询返回具有相同名称"的组的金额"之和.
This is the same reason your sum query also returns 10. The query returns the sum of 'amount' for a group with the same 'name'.
要获取所有金额的总和,只需致电,
To get the sum of all amounts, simply call,
Member::sum('amount');
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