what to sort by (al, at, ar, c, l, r, t), 'at' is default al: average lock time ar: average rows sent at: average query time c: count l: lock time r: rows sent t: query time-r 反转顺序,默认文件倒序拍。reverse the sort
AI代码解释 CREATETABLEpar_table(viewTimeINT,useridBIGINT,page_urlSTRING,referrer_urlSTRING,ipSTRINGCOMMENT'IP Address of the User')COMMENT'This is the page view table'PARTITIONEDBY(dateSTRING,posSTRING)ROWFORMATDELIMITED‘\t’FIELDSTERMINATEDBY'\n'STOREDASSEQUENCEFILE; 创建分桶表: 代码语言:javascrip...
方法四：使用distribute by rand() + sort by rand()在 Hive SQL 中，还可以使用 `distribute by r...
答案: -- MySQL 实现 SELECT emp_name FROM employee WHERE emp_id <= 10 ORDER BY CONVERT(emp_name USING GBK); -- Oracle 实现 SELECT emp_name FROM employee WHERE emp_id <= 10 ORDER BY NLSSORT(emp_name,'NLS_SORT = SCHINESE_PINYIN_M'); 解析:中文可以按照拼音进行排序,或者按照偏旁部首进行...
b) SELECT * FROM User_Sales ORDER BY Last_Name DESC; c) SELECT * FROM User_Sales ORDER BY First_Name WHERE Sales > 100; d) SELECT * FROM User_Sales ORDER BY Last_Name, First_Name; 2. What is the result of the following query? SELECT * FROM User_Sales WHERE Join_Date IN ('...
date_add可以透過 或來叫用TIMESTAMP,因為BIGINT隱含的下播。 SQL 複製 > SELECT date_add(TIMESTAMP'2011-11-30 08:30:00', 5L); 2011-12-05 date_add 可以因隱含的跨類型轉換而使用 STRING 來叫用。 SQL 複製 > SELECT date_add('2011-11-30 08:30:00', '5'); 2011-12-05 相關 ANSI...
[l_orderkey])) |--Sort(ORDER BY:([ORDERS].[o_orderkey] ASC)) | |--Parallelism(Repartition Streams, PARTITION COLUMNS: ([ORDERS].[o_orderkey])) | |--Index Seek(OBJECT: ([tpcd1G].[dbo].[ORDERS].[O_DATKEYOPR_IDX]), SEEK:([ORDERS].[o_orderdate] >= Apr 1 2000 12:00AM...
prestosql内置函数 presto date_trunc 文章目录 一、presto基础操作 二、时间函数 0、当前日期/当前时间 1、转时间戳 1)字符串转时间戳 (推荐) 2)按照format指定的格式,将字符串string解析成timestamp。 3)bigint 转时间戳 2、转年月日/取年月日
使用ORDER BY子句可以对查询结果进行排序,ORDER BY子句一定要写在所有查询语句的最后;详细介绍Restricting and Sorting Data Limit the rows that are retrieved by a query 限制从查询中返回的行Sort the rows that are retrieved by a query 对查询返回的行进行排序...
{ // sql可以直接在代码中编写,复杂sql建议在xml中定义 // 单表entity查询场景下sql字段可以写成java类的属性名称 return findPageEntity(pageModel, StaffInfoVO.class, EntityQuery.create() .where("#[staffName like :staffName]#[and createTime>=:beginDate]#[and createTime<=:endDate]") .values(...