Re: Multiple SQL STATEMENTS IN A MEMBER

Updating the value of a column within a row in one table from a
value obtained from a related row, or group of rows, from another
table was not added until V4R3.
Are you running V4R3?  With V4R3 I am able to do the following:
CREATE TABLE ROB/HEADER (KEYFIELD DEC (7, 0) NOT NULL WITH DEFAULT,
                         COUNTDTL DEC (7, 0) NOT NULL WITH DEFAULT)             
            
INSERT INTO ROB/HEADER VALUES(1, 0)                                
INSERT INTO ROB/HEADER VALUES(2, 0)                                
CREATE TABLE ROB/DETAIL (KEYFIELD DEC (7, 0) NOT NULL WITH DEFAULT,
                         LINEKEY  DEC (7, 0) NOT NULL WITH DEFAULT)             
             
INSERT INTO ROB/DETAIL VALUES(1, 1)                                
INSERT INTO ROB/DETAIL VALUES(1, 2)                                
INSERT INTO ROB/DETAIL VALUES(1, 3)                                
INSERT INTO ROB/DETAIL VALUES(2, 1)                                
INSERT INTO ROB/DETAIL VALUES(2, 2)                                
update rob/header
  set countdtl = (select count(*)
                         from rob/detail
                         where header.keyfield = detail.keyfield)               
            
select * from rob/header                                           
And I'll see:
KEYFIELD    COUNTDTL
       1           3
       2           2
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