https://www.dolphindb.cn/cn/help/DatabaseandDistributedComputing/DatabaseOperations/CreateDatabasesandTables.html 您可以看下这个分区介绍
回答于 2021-06-22 13:17
https://www.dolphindb.cn/cn/help/DataTypesandStructures/DataTypes/index.html 您可以看下这个
回答于 2021-06-22 13:16
for(chunkID in chunkIDs){ nodes = exec top 1 node from pnodeRun(getAllChunks) where chunkId=chunkID order by version desc rpc(getControllerAlias(), forceCorrectVersionByReplica{chunkID, nodes[0]}) } forceCorrectVersionByReplica该函数功能是,强制该chunk 以nodealias上的版本和数据...
回答于 2021-06-22 09:47
def diskUsage(database, table){ return select sum(diskUsage/1024/1024) diskM from pnodeRun(getTabletsMeta{"/"+substr(database,6)+"/%",table,true,-1}) group by dfsPath,node}diskUsage("dfs://test11", "test")
回答于 2021-06-22 09:38
t = table(1..10 as x, 11..20 as y) select * from t where x in [1,2,3]
回答于 2021-06-22 09:35