How to perform Grouping equivalent like Informatica? - postgresql

Question

I've an Informatica function which I want to convert into query to be getting used in Spring Batch code.
I've a table EMPLOYEE table having 15 fields (all I want in select) and Informatica has function Router which creates group based on STATUS_CD = 'A' and default (means all other records should go here - where status is other than A).
How can we do in Postgres?
I've all the employees and I want to check based using combination of EMPLOYEE_CD, EMPLOYEE_ID is unique and I want to simply return the count of it.
Query1
SELECT EMPLOYEE_CD AS EMPLOYEE_CD,
EMPLOYEE_ID AS EMPLOYEE_ID,
COUNT (*) AS CNT
FROM EMPLOYEE
GROUP BY EMPLOYEE_CD, EMPLOYEE_ID
HAVING COUNT (*) > 1;
Query 2
SELECT EMPLOYEE_ID, EMPLOYEE_NAME, EMPLOYEE_EMAIL, EMPLOYEE_PHONE, EMPLOYEE_ADDRESS, (Create Count Field here)
FROM EMPLOYEE
Query 3 - I need to group (which is my original question) or Create Columns ACTIVE, NON_ACTIVE columns as a part of query results where EMPLOYEE_STAT_CD = 'A', ACTIVE column value should say YES and EMPLOYEE_STAT_CD other than A, NON_ACTIVE should say Yes.
How can merge Query1 and Query 2 and Query 3 into single query ?

Answer 1

if I understood the question, your code is something like:
SELECT EMPLOYEE_ID, EMPLOYEE_NAME, EMPLOYEE_EMAIL, EMPLOYEE_PHONE, EMPLOYEE_ADDRESS,
COUNT(*)OVER(PARTITION BY EMPLOYEE_CD, EMPLOYEE_ID) AS counter_from_sql1,
CASE WHEN EMPLOYEE_STAT_CD = 'A' THEN 'YES' ELSE NULL END AS ACTIVE,
CASE WHEN EMPLOYEE_STAT_CD <> 'A' THEN 'YES' ELSE NULL END AS NON_ACTIVE
FROM EMPLOYEE;
or
SELECT * FROM (
SELECT EMPLOYEE_ID, EMPLOYEE_NAME, EMPLOYEE_EMAIL, EMPLOYEE_PHONE, EMPLOYEE_ADDRESS,
COUNT(*)OVER(PARTITION BY EMPLOYEE_CD, EMPLOYEE_ID) AS counter_from_sql1,
CASE WHEN EMPLOYEE_STAT_CD = 'A' THEN 'YES' ELSE NULL END AS ACTIVE,
CASE WHEN EMPLOYEE_STAT_CD <> 'A' THEN 'YES' ELSE NULL END AS NON_ACTIVE
FROM EMPLOYEE
) z
WHERE counter_from_sql1 > 1;