Sum系列方法
目录
Sum系列方法
求和数据可以使用Sum
, SumInt
, Sums
和 SumsInt
四个方法,Sums系列方法的参数为struct的指针并且成为查询条件。
- Sum 求某个字段的和,返回float64
type SumStruct struct {
Id int64
Money int
Rate float32
}
ss := new(SumStruct)
total, err := engine.Where("id >?", 1).Sum(ss, "money")
fmt.Printf("money is %d", int(total))
- SumInt 求某个字段的和,返回int64
type SumStruct struct {
Id int64
Money int
Rate float32
}
ss := new(SumStruct)
total, err := engine.Where("id >?", 1).SumInt(ss, "money")
fmt.Printf("money is %d", total)
- Sums 求某几个字段的和, 返回float64的Slice
ss := new(SumStruct)
totals, err := engine.Where("id >?", 1).Sums(ss, "money", "rate")
fmt.Printf("money is %d, rate is %.2f", int(total[0]), total[1])
- SumsInt 求某几个字段的和, 返回int64的Slice
ss := new(SumStruct)
totals, err := engine.Where("id >?", 1).SumsInt(ss, "money")
fmt.Printf("money is %d", total[0])