比如我在DolphinDB中有下面2张表:
code=`A`B`C`D`E totalValue=10 20 30 40 50 t1=keyedTable(`code,code,totalValue) t2 = table(`A`C`B`D as code, 1..4 as value)
我想把t2中value加到t1中相同code的totalValue上,使得 totalValue = totalValue + t2.value,这个应该怎么处理?
可用ej实现,例如:
update t1 set totalValue=totalValue+t2.value from ej(t1,t2,`code)
或者
update t1 set totalValue=totalValue+t2.value where t1.code=t2.code
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