1、SQL窗口的,执行SQL后只能去output查看; 2、command window的,需要先设置set serveroutput on size unlimited,然后再执行存储过程 output或者命令窗口查看的真实执行计划和统计信息: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 SQL_IDabk3ghv9u1tvb,child number0---SELECT/*+ monitor */*FROMAPPR_HAND...
Note that there’s also an ASC option, which explicitly tells ORDER BY to sort the result set in ascending order. Since sorting is by ascending order by default, the SQL ORDER BY clause usually doesn’t need you to specify ASC. But there are times when it may come in handy. Both ASC...
就有几个reduce任务;否则就看不到distribute by的效果。 distribute by分区规则是根据分区字段的hash值与分区数(reduce任务的总数)进行除模后,余数相同 的分到一个分区中。 要求:distribute by语句写在sort by语句的前面。 hive>setmapreduce.job.reduces=4; hive>insertoverwrite local directory'/opt/distributebyr...
Load a command.Click the partial command displayed in the SQL column to load the command into the command editor. When the command loads, it also sets the schema in which it was last executed. Sort by time.Click the Time column heading to sort the command history by least recent or most...
setCommand(MysqlCommand.COM_SLEEP); } (二)Parse ConnectProcessor 接收到 SQL 之后会进行 analyze ,Apache Doris SQL 解析使用的 Parse 是 Java CUP Parser,语法规则 定义的文件在 sql_parser.cup。 感兴趣的同学可以详细看一下 StatementBase 类 analyze 方法, 返回 List(这里主要是语法解析) 代码语言:...
obclient: [Warning] Using a password on the command line interface can be insecure. *** 1. row *** Query Plan: === |ID|OPERATOR |NAME |EST. ROWS|COST| --- |0 |EXCHANGE IN REMOTE | |1 |54 | |1 | EXCHANGE OUT REMOTE| |1 |53...
-- This command forces all closed and open row groups into columnstore. ALTER INDEX IndFactResellerSalesXL_CCI ON FactResellerSalesXL_CCI REORGANIZE WITH (COMPRESS_ALL_ROW_GROUPS = ON); 重新組織資料表中的所有索引 下列範例會重新組織 HumanResources.Employee 資料庫中 Adventur...
-- This command forces all closed and open row groups into columnstore. ALTER INDEX IndFactResellerSalesXL_CCI ON FactResellerSalesXL_CCI REORGANIZE WITH (COMPRESS_ALL_ROW_GROUPS = ON); 重新组织表中的所有索引 下面的示例重新组织 AdventureWorks2022 数据库中 HumanResources.Employee 表内的所有索引。
(s,start_time,GETDATE())%3600)/60ASvarchar) +'min, '+CAST((DATEDIFF(s,start_time,GETDATE())%60)ASvarchar) +' sec'ASrunning_timeFROMsys.dm_exec_requestsASrLEFTJOINsys.databasesASdONr.database_id = d.database_idWHEREr.commandIN('DbccSpaceReclaim','DbccFilesCompact','DbccLOBCompact'...
$sort阶段:接收分组计算的输出,按total得分进行排序 聚合操作示例二 导入邮政编码数据集:https://media.mongodb.org/zips.json 复制下来,放入记事本并重命名为zips.json即可。 使用mongoimport工具导入数据[[Download MongoDB Tools](Download MongoDB Command Line Database Tools | MongoDB) ...