4.2 局部排序sort by -- 设置reduce个数 set mapreduce.job.reduces=2; -- 按照工资降序查看员工信息 select empno,ename,sal from emp sort by sal desc; --输出本地 insert overwrite local directory '/home/hadoop/output/sort2' select empno,ename,sal from emp sort by sal desc; 1. 2. 3. 4...
.7795.30 rows=3 width=80) Sort Key: l_returnflag, l_linestatus [id=21 dop=1 time=2427/2427/2427ms rows=4(4/4/4) mem=3/3/3KB open=2427/2427/2427ms get_next=0/0/0ms] -> Gather (cost=0.00..7795.27 rows=3 width=80) [20:1 id=100003 dop=1 time=2426/2426/2426ms rows=4...
The ability of selection to explain this sort of fact (‘trait facts’) vindicates the explanatory commitments of empirical studies on microevolution. Trait facts must be distinguished from a closely related kind of fact, that is, the fact that a particular individual x has one trait rather ...
tidb-global-sort.md tidb-in-kubernetes.md tidb-limitations.md tidb-monitoring-api.md tidb-monitoring-framework.md tidb-operator-overview.md tidb-read-staleness.md tidb-resource-control.md tidb-scheduling.md tidb-storage.md tidb-troubleshooting-map.md tiflash-deployment-topology.md tiflash-performa...
Select a code fragment and right-click it to open the context menu. SelectAI Actionsand thenExplain Code. TheAI Assistanttool window will open to provide you with an explanation. As you can see in the example above, the assistant correctly recognized and explained the bubble sort algorithm. ...
a在这几个品牌中排序你会怎么排序 Sorts you how in these brands to be able to sort[translate] aThe Effect of SOX Internal Control Deficiencies on Firm Risk and Cost of Equity 正在翻译,请等待... [translate] aselect 'Move' in the build menu and move a building 精选的‘移动’在修造菜单和...
Contains information on the selection of the query plan by the查询优化器. explain.queryPlanner.namespace A string that specifies thenamespacewith the names of the database and the collection accessed by the query. The namespace has the format<database>.<collection>. ...
文章目录 语法 各列详解 key rows possible_keys key_len table select_type simple primary derived dependent subquery union union result partitions Extra using where using temporary using filesort Using index using... 查看原文 MySQL EXPLAIN 实践汇总(操练) ...
图中用Explain Everything录制的微课类型是()。 A、手绘动画 B、墨迹动画 C、情景剧 D、教师讲授 点击查看答案
serverInfo, which provides information on the MongoDB instance. serverParameters, which details internal parameters. The verbosity mode (i.e.queryPlanner,executionStats,allPlansExecution) determines whether the results includeexecutionStatsand whetherexecutionStatsincludes data captured duringplan selection. ...