The estimated time for this step is 0.03 seconds. 5) Finally, we send out an END TRANSACTION step to all AMPs involved in processing the request. -> The contents ofSpool 1are sent back to the user as the result of statement 1. The total estimated time is 0.14 seconds....
上个世纪它靠着MPP一招鲜吃变天, 居然做了十多年数据仓库的老大, 时过境迁, 现在有不少SQL On Hadoop 产品已经出来了, 考虑到scale out的成本和能力, Teradata 数据仓库优势荡然全无. 将来必将会被SQL on Hadoop/Spark替代. 毕竟在Teradata上做了几年, 也该写点总结. 下面是我常用的一些编程知识 --字符串...
Gauss does not support WITH CHECK OPTION in CREATE VIEW. Please enable the config_param tdMigrateViewCheckOption to comment the WITH CHECK OPTION syntax in the statement. true false false tdMigrateVIEWCHECKOPTION=true tdMigrateZEROIFNULL
FunctionSQLstatement SQLCommands-DML DataManipulationLanguage(DML) SQLstatementFunction SELECT Performrelationalqueryfunctions.(Select, Project,Join,Union,Intersect,Minus) INSERTPlaceanewrowintoatable. UPDATEModifyvaluesinanexistingrow. DELETE Removearowfromatable. ...
修改 hadoop 配置 首先需要修改hadoop的配置文件etc/hadoop/core-site.xml，添加如下配置项，其中 <user>...
Teradata Vantage automatically transforms your SQL statement into a more compact and efficient without changing the meaning of the request with the goal to reduce resource usage and runtime. Find out how Teradata's Optimizer helps your analytics queries run more efficiently through query re-write fea...
Transaction Details with SQL Statement Session Grouping (By Session ID, Client Address, and more) Teradata Aster Storage Manager Provides GUI view and search access for: Tree View for Databases, Device Usage Database View, Device Usage Table, Index Storage View Teradata Aster Security Manager Prov...
(Optional) Query banding and initial SQL statement to run every time Tableau connects Driver required This connector requires a driver to talk to the database. If the driver is not installed on your computer, Tableau displays a message in the connection dialog box with a link to theDriver Dow...
(enter the security token) ; OR enter the name of the file containing CREATE REPLICATION GROUP ; statement for a new group (set up in step 4) CreateGroupStmtFile=./RepGroupPerf.sql ; Character set (ASCII, UTF16) CharacterSet=ASCII ; RSG Node addresses - specify name or IP, with ...
o SQL statement for a correlated subquery o use of a derived table Physical Design and Implementation o interpret DBQL output o determine columns for compression –Introduction to compresssion o ALTER a table vs. CREATE a new table