PL/SQL procedure not compiling - sql

Question

I have a PL/SQL procedure that is not compiling. The errors are:
Error(3,7): PLS-00103: Encountered the symbol "INTO" when expecting one of the following: ( begin case declare exit for goto if loop mod null pragma raise return select update while with <an identifier> <a double-quoted delimited-identifier> <a bind variable> << continue close current delete fetch lock insert open rollback savepoint set sql execute commit forall merge pipe purge The symbol "INTO" was ignored.
Error(8,1): PLS-00428: an INTO clause is expected in this SELECT statement.
My code:
CREATE OR REPLACE PROCEDURE findvisitsandlaborcosts
as
begin
select * from SI.customer;
end;
/
I have googled an online syntax checker and it says on the first line there is an error. But WHERE?!? It seems to be correct. I have googled the syntax of declaring a procedure and I have cross-checked many times. It must be something simple that I am overlooking...

Answer 1

in a PLSQL code, you need a placeholder to keep results of a SELECT query. Since PLSQL engine is expecting INTO clause within SELECT statement.
To begin with, you can select a set of columns and assign their values to local variables.
Your code should be like this -
CREATE OR REPLACE PROCEDURE findvisitsandlaborcosts
as
v_column1 SI.customer.column1%type;
v_column2 SI.customer.column2%type;
begin
select column1, column2 into v_column1, v_column2 from SI.customer;
end;
/
Note - you need to replace column1 and column2 with actual column names before running this code at your end.

Answer 2

If you want the results to get displayed on the caller of the procedure, then you would define an out parameter and print the records outside of the procedure
CREATE OR REPLACE PROCEDURE findvisitsandlaborcosts(x out sys_refcursor)
as
begin
open x for
select * from dual;
end;
/
--Note this block of code needs to be run in sqlci or sqldeveloper
define m ref cursor;
exec findvisitsandlaborcosts(:x);
print x;
Oracle 12c has support for implict return results
Have a look at this link
https://oracle-base.com/articles/12c/implicit-statement-results-12cr1