Split a column by values into new columns SQL

Question

I'm trying to learn SAS and I want to split the different rows of a table into different columns, to group the data.

Namely,

Table Detailed

Num    Date   Type Amount    
A1  6/12/2018 Merc   5    
A2  7/3/2014  Merc   10    
A2  6/5/2014  Merc   6    
A2  6/5/2014  Cong   15
A3  5/6/2020  Cong   30   
A4  7/8/2019  Cong   6     
A3  5/6/2020  Fres   7
A4  7/8/2019  Fres   9

and I want to transform in this table

Table Summary

Num    Date   Merc Cong Fres    
A1  6/12/2018  5   
A2  7/3/2014   10    
A2  6/5/2014   6    15   
A3  5/6/2020        30   7  
A4  7/8/2019        6    9     

Developed this query but is not working.

PROC SQL;
   CREATE TABLE WORK.Summary AS 
   SELECT t1.Number, 
          t1.Date, 
          t1.Type, 
          (case when t1.Type='Mercearia' then t1.Type) as Merc,
          (case when t1.Type='Congelado' then t1.Type) as Cong,
          (case when t1.Type='Fresco' then t1.Type) as Fres,
      FROM WORK.Detailed t1
END    

Thanks in advance!

Answer 1

Try a PROC TRANSPOSE instead. It's dynamic so you don't need to know the number of types ahead of time.

proc sort data=detailed; by number date;

proc transpose data=detailed out=Summary;
by number date;
id type;
var amount;
run;

Answer 2

You are close. You need aggregation and to fix some of the other syntax:

SELECT d.Number, d.Date, 
       MAX(case when d.Type = 'Mercearia' then d.Amount end) as Merc,
       MAX(case when d.Type = 'Congelado' then d.Amount end) as Cong,
       MAX(case when d.Type = 'Fresco' then d.Amount end) as Fres
FROM WORK.Detailed d
GROUP BY d.Number, d.Date;