[英]Intersection between two tables in DolphinDB server
我正在嘗試在 DolphinDB 中使用intersection
function 如下:
n=1000000
ID=rand(100, n)
dates=2017.08.07..2017.08.11
date=rand(dates, n)
x=rand(10.0, n)
t=table(ID, date, x)
dbDate = database(, VALUE, 2017.08.07..2017.09.11)
dbID = database(, RANGE, 0 50 100)
db = database("dfs://compodb", COMPO, [dbDate, dbID])
pt = db.createPartitionedTable(t, `pt, `date`ID).append!(t)
dfsTable=loadTable("dfs://compodb","pt")
A = select * from dfsTable where date = 2017.08.07
B = select * from dfsTable where date = 2017.08.08
intersection(A[`x],B[`x])
但我收到錯誤:
The both arguments for 'bitAnd'(&) must be integers
顯然有些東西在這個查詢中不起作用......有什么想法嗎?
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