I am working on converting SAS code to Snowflake and I got a scenario to implement "PROC TRANSPOSE" functionality in Snowflake. Below is the same table data I have in snowflake and I need to transpose rows into columns and columns into rows at a time.
Sample Input Data:
Sample Output Data:
This might help: https://libguides.library.kent.edu/SAS/TransposeData
The snowflake equivalent is: https://docs.snowflake.com/en/sql-reference/constructs/pivot.html
PROC TRANSPOSE DATA=inputDataset OUT=outputDataset;
BY variable(s);
COPY variable(s);
ID variable;
VAR variable(s);
RUN;
VS:
SELECT ...
FROM ...
PIVOT ( <aggregate_function> ( <pivot_column> )
FOR <value_column> IN ( <pivot_value_1> [ , <pivot_value_2> ... ] ) )
[ ... ]
Related
I have two datasets. The first, big_dataset, has around 3000 columns, most of which are never used. The second, column_list, contains a single column called column_name with around 100 values. Each value is the name of a column I want to keep.
I want to filter big_dataset so that only columns in column_list are kept, and the rest are discarded.
If I were using Pandas dataframes in Python, this would be a trivial task:
cols = column_list['column_name'].tolist()
smaller_dataset = big_dataset[cols]
However, I can't figure out the SAS equivalent. Proc Transpose doesn't let me turn the rows into headers. I can't figure out a statement in the data step that would let this work, and as far as I'm aware this isn't something that Proc SQL could handle. I've read through the docs on Proc Datasets and that doesn't seem to have what I need either.
To obtain a list of columns from column_list to use against big_dataset, you can query the column_list table and put the result into a macro variable. This can be achieved with PROC SQL and the SEPARATED BY clause:
proc sql noprint;
select column_name
into :cols separated by ','
from column_list;
create table SMALLER_DATASET AS
select &cols.
from WORK.BIG_DATASET;
quit;
Alternatively you may use SEPARATED BY ' ' and then use the resulting list in a KEEP statement or dataset option:
proc sql noprint;
select column_name
into :cols separated by ' '
from column_list;
quit;
data small_dataset;
set big_dataset (keep=&cols.);
/* or keep=&cols.; */
run;
After I run this SAS SQL process. The date variable "EXVISDAT" showed in the results in a numerical way. How can I change the code to let the date variable "EXVISDAT" show in format of "date9."？
proc sql;
create table test2 as
select VISIT, Targetdays, Targetdays + '01JUL2019'd - 1 as EXVISDAT
from data_in.chrono_visits_lts14424
order by Targetdays
;
quit;
You can read about it in documentation.
In yours case, query will look like:
proc sql;
create table test2 as
select VISIT, Targetdays, Targetdays + '01JUL2019'd - 1 as EXVISDAT format=date9.
from data_in.chrono_visits_lts14424
order by Targetdays
;
quit;
I have a large data set having millions of records with more than 200 columns. Is there any way to perform the sum of columns in SAS.Below is the sample data.
I want to display the data as below.Like Need to SUM all the values of columns in col1 .100+100+100+100+100+100=600
A simple proc summary will suffice.
proc summary data=want nway ;
var col1-col7 ;
output out=sum (drop=_:) sum= ;
run ;
I have metrics sas table like below
work.met_table
Metrics_Id Metrics_desc
1 Count_Column
2 Sum_Column
3 Eliminate_column
I wanna do something like doing while loop in T-sql
select count(*) :cnt_tbl from work.met_table
%let init_cnt = 1
while (&init_cnt = &cnt_tbl)
begin
select Metrics_desc into :met_nm
from work.met_table
where metrics_id = 1
Insert into some_sas_table
Select * from another table where Metrics_desc =&met_nm
/* Here I wanna loop all values in metrics table one by one */
end
%put &init_cnt = &int_cnt+1;
How this can be done in proc sql? Thanks in advance
If you want to dynamically generate code then use the SAS macro language.
But for your example there is no need to dynamically generate code.
proc sql ;
insert into some_sas_table
select *
from another_table
where Metrics_desc in (select Metrics_desc from work.met_table)
;
quit;
You can also do an explicit pass through. Send your native t-sql code to run on the database Server through SAS rather than bringing the data to the SAS application server to query it.
The example below is explained in details here.
PROC SQL;
CONNECT TO ODBC(DATASRC=SQLdb USER=&SYSUSERID) ;
/* Explicit PASSTHRU with SELECT */
SELECT *
FROM CONNECTION TO ODBC (
SELECT b.idnum o.[SSdatecol] AS mydate
FROM dbo.big_SS_table1 b
LEFT JOIN dbo.other_SStable o
ON b.idnum = o.memberid
WHERE o.otherdatecol >= '2014-10-06'
--This is a T-SQL comment that works inside SQL Server
) ;
;
DISCONNECT FROM ODBC ;
QUIT;
I want to store count of dataset in variable like below
%let Cnt ;
create table work.delaycheck as
select * from connection to oracle
(
SELECT PTNR_ID,CLNT_ID,REPORTING_DATE_KEY,NET_SALES
FROM FACT_TABLE
MINUS
SELECT PTNR_ID,CLNT_ID,REPORTING_DATE_KEY,NET_SALES
FROM HIST_FCT
);
I want to store count of this table in the variable Cnt like below
%put = (Select count(*) from work.delaycheck )
And Then
If(Cnt=0)
THEN
DO NOTHING
ELSE
execute(
Insert into Oracle_table
select * from work.delaycheck
) by oracle;
disconnect from oracle;
quit;
How can I acheive these steps? Thanks In advance!!
All of the SQL and data shown is occurring remotely. You can perform all the activity there without involving SAS. Oracle will process
PROC SQL;
CONNECT TO ORACLE ...;
EXECUTE (
INSERT INTO <TARGET_TABLE>
SELECT * FROM
( SELECT PTNR_ID,CLNT_ID,REPORTING_DATE_KEY,NET_SALES
FROM FACT_TABLE
MINUS
SELECT PTNR_ID,CLNT_ID,REPORTING_DATE_KEY,NET_SALES
FROM HIST_FCT
)
) BY ORACLE;
and not insert any records if the fact table is comprised of only historical facts.
EXECUTE can also submit PL/SQL statements, which in-turn can reduce the need for extraneous system interplay.
Delete this line from your code
%let Cnt ;
In order to get the count: Add the code below which will create the macro variable Cnt with the count:
proc sql;
Select count(*) into: Cnt from work.delaycheck ;
quit;
Update the if statement: the "&" is used to reference macro variables
If &cnt=0
The Code below shows how to use the if/else and the use of Call Execute:
data _null_;
if &cnt=0 then put 'Cnt is 0';/*if true: a note is written to the log*/
else call execute ('proc print data=work.e; run;');
/*else clause: the Proc Print code is executed*/
run;