demo_all=do.call(rbind,lapply(1:length(demo),function(i) select(as.data.frame(demo[i]),primaryid,caseid, age,age_cod,event_dt,sex,reporter_country))) dim(demo_all) 3554979 7 我们看到人口数据有超过350万行观测(记录)。 译者注:下面的内容都是重复这个流程,可以略过 现在让我们合并所有的药品...
SELECTREPLACE('DOWNGRADE DOWNWARD','','UP')FROMDUMMY;SELECTREPLACE('DOWNGRADE DOWNWARD','','')FROMDUMMY;SELECTREPLACE('','','UP')FROMDUMMY;SELECTREPLACE('DOWNGRADE DOWNWARD','DOWN','UP')FROMDUMMY;SELECTREPLACE_REGEXPR('([[:digit:]]{4})-([[:digit:]]{2})-([[:digit:]]{2})'IN'2...
USE[tpcxbb_1gb]--Get email addresses of customers in cluster 0 for a promotion campaignSELECTcustomer.[c_email_address], customer.c_customer_skFROMdbo.customerJOIN[dbo].[customer_clusters]ascONc.Customer = customer.c_customer_skWHEREc.cluster =0 你可以更改 c.cluster 值,以返回其他...
R ## Not run:# See ?StoredProcedure for creating the "cleandata" table.# train 1 takes a data frame with clean data and outputs a modeltrain1 <-function(in_df) { in_df[,"DayOfWeek"] <- factor(in_df[,"DayOfWeek"], levels=c("Monday","Tuesday","Wednesday","Thursday","Friday",...
This example uses the R grep function to search the vector of available paths and find the path that includes "Program Files". For more information, seeRDocumentation for the base package. If you think the packages are already installed, check the list of installed packages by runninginstalled....
Note the use of thestrfunction in R to get the schema of the output data. This function returns the following information: OutputCopy 'data.frame':2 obs. of 4 variables: $ c1: int 1 -11 $ c2: Factor w/ 2 levels "Hello","world": 1 2 $ c3: Factor w/ 2 levels "6732EA46-2D...
设置完成后,SQL Server 组件和实例的使用情况和诊断数据收集设置可以通过“错误和使用情况报告”应用程序进行更改。 可将此应用程序作为 SQL Server 安装的一部分。 借助此工具,每个 SQL Server 实例都可以配置自己的使用情况报告设置。 备注 错误和使用情况报告应用程序在 SQL Server 的“配置工具”下列出。 使用此工...
PARTITION FUNCTION 分区方案 程序 QUEUE REMOTE SERVICE BINDING RESOURCE POOL ROLE 路线 规则 SCHEMA SEARCH PROPERTY LIST 安全策略 选择性 XML 索引 SEQUENCE 服务器审核 服务器审核规范 SERVER ROLE SERVICE 空间索引 统计学 对称密钥 同义词 TABLE TABLE(SQL 图形) TABLE IDENTITY(属性) TRIGGER 类型 USER VIEW ...
functionIRR(in_varrayinvarchar2)returnnumberisv_irrnumber; v_amount_array typ_cashflow_array;beginv_amount_array :=typ_cashflow_array();declarev_varray_strvarchar2(1000); v_lengthnumber; v_splitvarchar2(2); v_cntinteger;beginv_varray_str:=ltrim(rtrim(in_varray)); ...
1) function(args)窗口函数，一般可以使用以下2种函数：专用窗口函数，如：rank()、dense_rank()、row...