Sum

Sum methods

You can use Sum, SumInt, Sums and SumsInt methods to summerize columns, and you can also use sql conditions and struct conditions.

• Sum

type SumStruct struct {
    Id int64
    Money int
    Rate float32
}
ss := new(SumStruct)
var err error
var total float64
total, err = engine.Where("id >?", 1).Sum(ss, "money")
fmt.Printf("money is %d", int(total))

• SumInt

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

ss := new(SumStruct)
var err error
var totals []float64
totals, err = engine.Where("id >?", 1).Sums(ss, "money", "rate")
fmt.Printf("money is %d, rate is %.2f", int(total[0]), total[1])

• SumsInt

ss := new(SumStruct)
var err error
var totals []int64
totals, err = engine.Where("id >?", 1).SumsInt(ss, "money")
fmt.Printf("money is %d", total[0])