diff --git a/session_update.go b/session_update.go
index 73484a82..0f2d1b5c 100644
--- a/session_update.go
+++ b/session_update.go
@@ -253,9 +253,9 @@ func (session *Session) Update(bean interface{}, condiBean ...interface{}) (int6
 	var condSQL string
 	cond := session.Statement.cond.And(autoCond)
 
-	doIncVer := false
+	var doIncVer = (table != nil && table.Version != "" && session.Statement.checkVersion)
 	var verValue *reflect.Value
-	if table != nil && table.Version != "" && session.Statement.checkVersion {
+	if doIncVer {
 		verValue, err = table.VersionColumn().ValueOf(bean)
 		if err != nil {
 			return 0, err
@@ -263,7 +263,6 @@ func (session *Session) Update(bean interface{}, condiBean ...interface{}) (int6
 
 		cond = cond.And(builder.Eq{session.Engine.Quote(table.Version): verValue.Interface()})
 		colNames = append(colNames, session.Engine.Quote(table.Version)+" = "+session.Engine.Quote(table.Version)+" + 1")
-		doIncVer = true
 	}
 
 	condSQL, condArgs, _ = builder.ToSQL(cond)
@@ -275,8 +274,8 @@ func (session *Session) Update(bean interface{}, condiBean ...interface{}) (int6
 		condSQL = condSQL + fmt.Sprintf(" ORDER BY %v", st.OrderStr)
 	}
 
-	// TODO: Only Mysql support
-	// MSSQL: update top (100) table1 set field1 = 1
+	// TODO: Oracle support needed
+	var top string
 	if st.LimitN > 0 {
 		if st.Engine.dialect.DBType() == core.MYSQL {
 			condSQL = condSQL + fmt.Sprintf(" LIMIT %d", st.LimitN)
@@ -288,10 +287,21 @@ func (session *Session) Update(bean interface{}, condiBean ...interface{}) (int6
 			if len(condSQL) > 0 {
 				condSQL = "WHERE " + condSQL
 			}
+		} else if st.Engine.dialect.DBType() == core.POSTGRES {
+			tempCondSQL := condSQL + fmt.Sprintf(" LIMIT %d", st.LimitN)
+			cond = cond.And(builder.Expr(fmt.Sprintf("CTID IN (SELECT CTID FROM %v %v)",
+				session.Engine.Quote(session.Statement.TableName()), tempCondSQL), condArgs...))
+			condSQL, condArgs, _ = builder.ToSQL(cond)
+			if len(condSQL) > 0 {
+				condSQL = "WHERE " + condSQL
+			}
+		} else if st.Engine.dialect.DBType() == core.MSSQL {
+			top = fmt.Sprintf("top (%d) ", st.LimitN)
 		}
 	}
 
-	sqlStr = fmt.Sprintf("UPDATE %v SET %v %v",
+	sqlStr = fmt.Sprintf("UPDATE %v%v SET %v %v",
+		top,
 		session.Engine.Quote(session.Statement.TableName()),
 		strings.Join(colNames, ", "),
 		condSQL)