diff --git a/engine.go b/engine.go
index 34f232c..1cbba2b 100644
--- a/engine.go
+++ b/engine.go
@@ -17,6 +17,7 @@ import (
 	"strings"
 	"time"
 
+	"github.com/fairyhunter13/decimal"
 	"github.com/fairyhunter13/xorm/caches"
 	"github.com/fairyhunter13/xorm/contexts"
 	"github.com/fairyhunter13/xorm/core"
@@ -1212,6 +1213,13 @@ func (engine *Engine) SumInt(bean interface{}, colName string) (int64, error) {
 	return session.SumInt(bean, colName)
 }
 
+// SumDecimal sums the records by some column. bean's non-empty fields are conditions.
+func (engine *Engine) SumDecimal(bean interface{}, colName string) (decimal.Decimal, error) {
+	session := engine.NewSession()
+	defer session.Close()
+	return session.SumDecimal(bean, colName)
+}
+
 // Sums sum the records by some columns. bean's non-empty fields are conditions.
 func (engine *Engine) Sums(bean interface{}, colNames ...string) ([]float64, error) {
 	session := engine.NewSession()
@@ -1226,6 +1234,13 @@ func (engine *Engine) SumsInt(bean interface{}, colNames ...string) ([]int64, er
 	return session.SumsInt(bean, colNames...)
 }
 
+// SumsDecimal sums the records by some columns. bean's non-empty fields are conditions.
+func (engine *Engine) SumsDecimal(bean interface{}, colNames ...string) ([]decimal.Decimal, error) {
+	session := engine.NewSession()
+	defer session.Close()
+	return session.SumsDecimal(bean, colNames...)
+}
+
 // ImportFile SQL DDL file
 func (engine *Engine) ImportFile(ddlPath string) ([]sql.Result, error) {
 	session := engine.NewSession()
diff --git a/go.mod b/go.mod
index a75d03f..148a991 100644
--- a/go.mod
+++ b/go.mod
@@ -7,9 +7,9 @@ require (
 	github.com/cespare/xxhash v1.1.0
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/denisenkom/go-mssqldb v0.0.0-20200620013148-b91950f658ec
-	github.com/fairyhunter13/decimal v1.2.0-imp-5
+	github.com/fairyhunter13/decimal v1.2.0-imp-6
 	github.com/fairyhunter13/newtype v1.0.10
-	github.com/fairyhunter13/reflecthelper/v3 v3.5.0
+	github.com/fairyhunter13/reflecthelper/v3 v3.5.1
 	github.com/go-sql-driver/mysql v1.5.0
 	github.com/lib/pq v1.7.0
 	github.com/mattn/go-sqlite3 v1.14.0
diff --git a/go.sum b/go.sum
index 831bbc0..3a48fe3 100644
--- a/go.sum
+++ b/go.sum
@@ -15,12 +15,13 @@ github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/denisenkom/go-mssqldb v0.0.0-20200620013148-b91950f658ec h1:NfhRXXFDPxcF5Cwo06DzeIaE7uuJtAUhsDwH3LNsjos=
 github.com/denisenkom/go-mssqldb v0.0.0-20200620013148-b91950f658ec/go.mod h1:xbL0rPBG9cCiLr28tMa8zpbdarY27NDyej4t/EjAShU=
-github.com/fairyhunter13/decimal v1.2.0-imp-5 h1:/dyrhMIGUp6qjb2vKjlD0vQGnMHVd2EsOdpTVmAZhOg=
 github.com/fairyhunter13/decimal v1.2.0-imp-5/go.mod h1:pqb4RNxJI5R5ilHfmg9FTkpRMxi95Sa1K6tACdWfv9M=
+github.com/fairyhunter13/decimal v1.2.0-imp-6 h1:6W9X0bC3A9Z8iaW8Wqew18dySWnQ6xbHni62bR/7CV0=
+github.com/fairyhunter13/decimal v1.2.0-imp-6/go.mod h1:pqb4RNxJI5R5ilHfmg9FTkpRMxi95Sa1K6tACdWfv9M=
 github.com/fairyhunter13/newtype v1.0.10 h1:Rq965Tg0UZwHbmbRnP81LMvwasOc1EKp7lHIyjrUoBs=
 github.com/fairyhunter13/newtype v1.0.10/go.mod h1:ta3gbBY75TORM7VVmLaI6nb5i73SDMgAps7QDw9JKFM=
-github.com/fairyhunter13/reflecthelper/v3 v3.5.0 h1:PM28lsmI70qoc2qlo8YpwBwU4i2DU3GxlS5hcvdBFX0=
-github.com/fairyhunter13/reflecthelper/v3 v3.5.0/go.mod h1:lbcpGAaw2Qrb1uYLlR5L5hFHH9wUoyF2LUIASJCaEcw=
+github.com/fairyhunter13/reflecthelper/v3 v3.5.1 h1:M5hyHHguUyTdQkyPcT7C1vYgdNKQHvwSnoZpdL2J0Ro=
+github.com/fairyhunter13/reflecthelper/v3 v3.5.1/go.mod h1:lbcpGAaw2Qrb1uYLlR5L5hFHH9wUoyF2LUIASJCaEcw=
 github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV9I=
 github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
 github.com/go-sql-driver/mysql v1.5.0 h1:ozyZYNQW3x3HtqT1jira07DN2PArx2v7/mN66gGcHOs=
diff --git a/session_stats.go b/session_stats.go
index 17d0a67..97591d4 100644
--- a/session_stats.go
+++ b/session_stats.go
@@ -8,6 +8,8 @@ import (
 	"database/sql"
 	"errors"
 	"reflect"
+
+	"github.com/fairyhunter13/decimal"
 )
 
 // Count counts the records. bean's non-empty fields
@@ -68,6 +70,11 @@ func (session *Session) SumInt(bean interface{}, columnName string) (res int64,
 	return res, session.sum(&res, bean, columnName)
 }
 
+// SumDecimal call sum some column. bean's non-empty fields are conditions.
+func (session *Session) SumDecimal(bean interface{}, columnName string) (res decimal.Decimal, err error) {
+	return res, session.sum(&res, bean, columnName)
+}
+
 // Sums call sum some columns. bean's non-empty fields are conditions.
 func (session *Session) Sums(bean interface{}, columnNames ...string) ([]float64, error) {
 	var res = make([]float64, len(columnNames), len(columnNames))
@@ -79,3 +86,9 @@ func (session *Session) SumsInt(bean interface{}, columnNames ...string) ([]int6
 	var res = make([]int64, len(columnNames), len(columnNames))
 	return res, session.sum(&res, bean, columnNames...)
 }
+
+// SumsDecimal call sum some columns. bean's non-empty fields are conditions.
+func (session *Session) SumsDecimal(bean interface{}, columnNames ...string) ([]decimal.Decimal, error) {
+	var res = make([]decimal.Decimal, len(columnNames), len(columnNames))
+	return res, session.sum(&res, bean, columnNames...)
+}