DolphinDB中的addColumn(table, colNames, colTypes)可以给分布式表或流数据表添加新的列。
具体的例子如下:
n=10 ticker = rand(`MSFT`GOOG`FB`ORCL`IBM, n) x=rand(1.0, n) t=streamTable(ticker, x) share t as st addColumn(st,["price", "qty"],[DOUBLE, INT]) insert into st values("MSFT", 12.0, 25.46, 256) select * from st;