1.Replace方法更新，与Wiki中描述一致

2.Replace方法使用性能更好的拼接法降低微乎其微的延迟
3.Replace方法开放无Where()查询状态的插入功能，不建议使用，因为Oracle没有主键检查，插入出错后，只能使用ret返回中的int判断是否有插入，插入了几条数据，有一定的插入失败风险，且Err不会报错

builder_oracle.go

@@ -184,42 +184,44 @@ func (b *BuilderOracle) BuildExecuteOra(operType string) (sqlStr string, args []
 			b.IOrm.GetISession().GetIEngin().GetLogger().Error(err.Error())
 			return
 		}
-		if where == "" && b.IOrm.GetForce() == false {
-			err = errors.New("出于安全考虑, update时where条件不能为空, 如果真的不需要where条件, 请使用Force()(如: db.xxx.Force().Update())")
-			b.IOrm.GetISession().GetIEngin().GetLogger().Error(err.Error())
-			return
-		}
-		select_sql, multiWhere, update_sql, insert_keys, insert_vals, err := b.BuildReplace(update, where)
+		select_sql, on_sql, update_sql, insert_keys, insert_vals, err := b.BuildReplace(update, where)
 		if err != nil {
 			return "", nil, err
 		}
-		sqlStr = fmt.Sprintf("MERGE INTO %s t USING (select %s FROM dual) d on (%s) WHEN matched THEN UPDATE SET%s WHEN NOT matched THEN INSERT (%s) VALUES (%s)",
-			b.BuildTable(), select_sql, multiWhere, update_sql, insert_keys, insert_vals)
+		sqlStr = "MERGE INTO " + b.BuildTable() + " t "
+		sqlStr += "USING (select " + select_sql + " FROM dual) d on (" + on_sql + ") "
+		if update_sql != "" {
+			sqlStr += "WHEN matched THEN UPDATE SET " + update_sql + " "
+		}
+		sqlStr += "WHEN NOT matched THEN INSERT (" + insert_keys + ") VALUES (" + insert_vals + ")"
+		//sqlStr = fmt.Sprintf("MERGE INTO %s t USING (select %s FROM dual) d on (%s) WHEN matched THEN UPDATE SET%s WHEN NOT matched THEN INSERT (%s) VALUES (%s)", b.BuildTable(), select_sql, on_sql, update_sql, insert_keys, insert_vals)
 		break
 	}
 
 	args = b.IOrm.GetBindValues()
 	return
 }
 
-func (b *BuilderOracle) BuildReplace(update, where string) (select_sql, multiWhere, update_sql, insert_keys, insert_vals string, err error) {
+func (b *BuilderOracle) BuildReplace(update, where string) (select_sql, on_sql, update_sql, insert_keys, insert_vals string, err error) {
 	var reg *regexp.Regexp
 	reg, err = regexp.Compile(`\(([^\)]+)\)`)
 	if err != nil {
 		return
 	}
 
-	wheres := reg.FindAllString(where, -1)
 	warr := []string{}
+	wheres := reg.FindAllString(where, -1)
+
 	for i, ws := range wheres {
 		ws = strings.ReplaceAll(ws, "(", "")
 		ws = strings.ReplaceAll(ws, ")", "")
 		if i > 0 {
-			multiWhere += " and"
+			on_sql += " and"
 		}
 		warr = append(warr, ws)
-		multiWhere += " t.\"" + ws + "\"=" + "d.\"" + ws + "\""
+		on_sql += " t.\"" + ws + "\"=" + "d.\"" + ws + "\""
 	}
+
 	data1 := strings.Split(update, ",")
 	for i, data := range data1 {
 		data_kv := strings.Split(data, "=")
@@ -229,10 +231,17 @@ func (b *BuilderOracle) BuildReplace(update, where string) (select_sql, multiWhe
 			insert_vals += ","
 		}
 		if !inArray(data_kv[0], warr) {
-			if update_sql != "" && i > 0 {
-				update_sql += ","
+			if len(warr) > 0 {
+				if update_sql != "" && i > 0 {
+					update_sql += ","
+				}
+				update_sql += " t." + b.AddFieldQuotesOracle(data_kv[0]) + "=" + "d." + b.AddFieldQuotesOracle(data_kv[0]) + ""
+			} else {
+				if i > 0 {
+					on_sql += " and"
+				}
+				on_sql += " t." + b.AddFieldQuotesOracle(data_kv[0]) + "=" + "d." + b.AddFieldQuotesOracle(data_kv[0]) + ""
 			}
-			update_sql += " t." + b.AddFieldQuotesOracle(data_kv[0]) + "=" + "d." + b.AddFieldQuotesOracle(data_kv[0]) + ""
 		}
 		insert_keys += b.AddFieldQuotesOracle(data_kv[0])
 		insert_vals += "d." + b.AddFieldQuotesOracle(data_kv[0]) + ""