library(dplyr) unite(mtcars, "vs_am", vs, am) Merging Data Adding Columns To merge two data frames (datasets) horizontally, use the merge function. In most cases, you join two data frames by one or more common key variables (i.e., an inner joi
select a + ' '+b as ab from tableName 如果是有整型的(例,b字段为int类型): select a +' '+Convert(VARCHAR(50),b) as ab from tableName 如果是有小数的(例,b字段为float类型) select a +' '+convert(varchar(20),convert(decimal(18,4),b)) as ab from tableName 注释:a,b为列名
问题原由: intouch项目中,利用intouch脚本来存储数据时,存入的时间格式为:date,time分开存储.在报表需求中,有需要利用查询两个时间段之间的数据. 问题解决: 1.直接写脚本(写出的脚本有bug) 表结构如下: select * from 在线数据日报表 where(convert(char(10),date,120)>='2018-10-30' and time>='18:00:00') and (convert(char(10),date,120)<='2018-
with tt as (select A.GID, CASE WHEN A.IsApp='是' THEN 'APP' else '' end 'APP', CASE WHEN A.IsSmallApp='是' THEN '小程序' else '' end 'SmallApp' from Order A ) select A.SalePrice,A.SaleStatus, --销售参与渠道 --(A.IsApp+','+A.IsSmallApp), --CASE WHEN A.IsApp='是'
关于和并列的 要这种效果. create table tb(idint, value varchar(10)) insert into tbvalues(1,'aa') insert into tbvalues(1,'bb') insert into tbvalues(2,'aaa') insert into tbvalues(2,'bbb') insert into tbvalues(2,'ccc') go /* stuff(param1, startIndex, length