right join:在inner join的基础上保留,副表的其他观测,但是非共有的观测行,无法显示匹配变量的值 Full join:显示两个表的全部内容,但是副表里的非共有的观测行,无法显示匹配变量的值 补充一个merge merge:会显示两个表的所有观测,不会有缺失,但是当匹配变量含重复值时,无法显示所有组合结果,只能按顺序匹配一次 ...
Merge If a; data Temp1_2; merge ICF(in=a) DM(in=b); by cn dn; if a; run; <Sql实现方法> proc sql ; create table Temp1_1 as select distinct a.*,b.BIRTHDAT from ICF as a left join DM as b on a.cn =b.cn and a.dn =b.dn ; quit; Merge If b; data Temp1_2; merge ...
proc sql PROC SQL; Create table dummy as Select * from A as x left join B as y On x.ID= y.ID; Quit; 坦白来讲,同时给我 merge by 和 proc sql,我会选 sql。上面的输出数据集是没问题的,以 A 中 id 作为 left join 的 key variable,同时搜索 B 中有相同 id 取值的行,进行左连接横向匹...
1DATA PINGPANG;2MERGE CHINA USA;3RUN; #output 使用SQL时:在SQL中应具体匹配到关键字,然后会从笛卡儿积中选取两个表中同时都存在的观测作为内连接。 1PROCSQL;2CREATETABLEPINGPANG01ASSELECT*FROMCHINAINNERJOINUSAONCHINA.LEVEL=USA.LEVEL;3QUIT; #output...
PROC SQL is a powerful yet still overlooked tool within our SAS arsenal. PROC SQL can create tables, sort and summarize data, and join/merge data from multiple tables and in-line views. The SELECT statement with the CASEWHEN clause can conditionally process the data like the IF-THEN-ELSE ...
SAS day 24: Proc SQL Join Review: Last time we went to over SAS Merge, it is a SAS Merge s
NOTE: PROC SQL planner chooses merge join.NOTE: Table WORK.OLD_TRAN_PROD_SYNC_MASTER1 created, with 181692824 rows and 22 columns. 842 quit;NOTE: PROCEDURE SQL used (Total process time): real time 15:31.88 user cpu time 5:40.43 system cpu time 5:08.82 memory 1059492.75k OS Memory 107726...
Join、Left Join、Right Join、Full Join、On、 Where区别和用法，不用我说其实前面的这些基本SQL语法...
from where 和inner join +on的作用一致 inner join +on是为了和left/right join on 相统一。 1proc sql;2title'self join';3selecta.gtone,b.shen4frommysas.ifthen1 a,mysas.ifthen1 b5wherea.date=b.date;6quit; 1. 2. 3. 4. 5.
proc sql outobs=3; title'股票代码和名称'; /*title设置表名*/ select stkcd,lstknm /*select+列名*/ from resdat.lstkinfo; quit; 4.查看表属性 proc sql; describe table resdat.lstkinfo; quit; 5.创建说明列 proc sql outobs=3; select 'stock code for',lstknm,'is',stkcd ...