求和
[
{NM:部门1,USERS:[{LVL:1,SCORE:6},{LVL:1,SCORE:7},{LVL:2,SCORE:8}]}
,{NM:部门2,USERS:[{LVL:1,SCORE:60},{LVL:3,SCORE:70},{LVL:2,SCORE:80}]}
,{NM:部门3,USERS:[{LVL:1,SCORE:600},{LVL:5,SCORE:700},{LVL:2,SCORE:800}]}
]
sum("TOTAL", "USERS", "SCORE", "LVL>1") 计算每个部门中 LVL大于1部分的用户子集 的SCORE合计 计算结果存储在TOTAL属性中
[
{NM:部门1,TOTAL:8, USERS:[{LVL:1,SCORE:6},{LVL:1,SCORE:7},{LVL:2,SCORE:8}]}
,{NM:部门2,TOTAL:150, USERS:[{LVL:1,SCORE:60},{LVL:3,SCORE:70},{LVL:2,SCORE:80}]}
,{NM:部门3,TOTAL:2100, USERS:[{LVL:6,SCORE:600},{LVL:5,SCORE:700},{LVL:2,SCORE:800}]}
]