Oracle sub error on query - sql

Question

Following code I added to the SQL Server query and now have to do the same in Oracle. I need to do grouping in the view rather than in the C#. I get this error message:
ORA-01747 Invalid user.table.column or column specification.
How must I code this to work in Oracle?
SELECT CTE.FACILITY_KEY, CTE.DATE, CTE.PATIENT_STATUS, COUNT(*) AS [COUNT]
FROM CTE
GROUP BY CTE.FACILITY_KEY, CTE.DATE, CTE.PATIENT_STATUS;
at the beginning of query I have this full code here:
CREATE OR REPLACE VIEW DBD_V_CDL_CHANGES AS
WITH CTE AS
(
SELECT TR.FACILITY_KEY
, MV.VALUE_CODE
, CAST(COUNT(*) AS NUMERIC(9, 0)) COUNT
FROM OPTC.THS_T_TRANSACTIONS1 TR
JOIN OPTC.THS_M_MENU2 M
ON M.MENU_ID = TR.MENU_ID
JOIN OPTC.THS_M_VALUES MV
ON MV.MENU_ID = TR.MENU_ID_VALUE
JOIN OPTC.THS_M_VALUES MV2
ON MV2.MENU_ID = TR.PREVIOUS_MENU_ID_VALUE
JOIN OGEN.GEN_M_PATIENT_MAST PM
ON PM.PAT_NUMBER = TR.PAT_NUMBER
WHERE TR.TR_DATETIME BETWEEN TRUNC(SYSDATE)
AND TRUNC(SYSDATE) + 86399 / 86400
AND TR.EDIT_NO < 0
AND MV.VALUE_TYPE IS NULL
AND MV2.VALUE_TYPE IS NULL
AND MV.VALUE_CODE >= 0
AND MV2.VALUE_CODE >= 0
AND M.SUB_SYS_EXT = 'G1'
AND ABS(MV.VALUE_CODE - MV2.VALUE_CODE) > 1
AND (PM.DISCHARGE_DATE IS NULL OR PM.DISCHARGE_DATE < SYSDATE)
GROUP BY TR.FACILITY_KEY, MV.VALUE_CODE)
SELECT CTE.FACILITY_KEY, CTE.DATE, CTE.PATIENT_STATUS, COUNT(*) AS [COUNT] FROM CTE
GROUP BY CTE.FACILITY_KEY, CTE.DATE, CTE.PATIENT_STATUS;

Answer 1

I see a few things wrong with your code.
First, you are selecting the following three columns FACILITY_KEY, VALUE_CODE and the count in the CTE:
SELECT TR.FACILITY_KEY ,
MV.VALUE_CODE ,
COUNT(*) as Count -- note there is no need to CAST(COUNT(*) AS NUMERIC(9, 0)) this
FROM OPTC.THS_T_TRANSACTIONS1 TR
But then when you select from the CTE you are selecting columns that you are not returning in the CTE:
with cte as
(
-- your query here does not return DATE or PATIENT_STATUS
)
SELECT CTE.FACILITY_KEY,
CTE.DATE,
CTE.PATIENT_STATUS,
COUNT(*) AS COUNT
FROM CTE
GROUP BY CTE.FACILITY_KEY, CTE.DATE, CTE.PATIENT_STATUS;
Where do PATIENT_STATUS and Date come from since you are not including them in your CTE? So these do not exist when you are trying to select them.
I replicated your error by including columns in the list that were not select in the CTE query.
The second issue is the CTE.DATE column. DATE is a reserved word, place that is double quotes CTE."DATE"

Answer 2

...AS [COUNT], ...AS NUMERIC(9, 0)) is not Oracle syntax and will never work. Simply remove [ ] and use NUMBER instead of NUMERIC. There is no need to CAST Count(). The Count() function will always return number, e.g. 0-zero or some number.
This is valid syntax in Oracle:
SELECT deptno, count(*) total_count_by_dept -- no need to cast or AS --
FROM scott.emp
GROUP BY deptno
/
Try not to use reserved words as COUNT for aliases:
SELECT CTE.FACILITY_KEY, CTE.DATE, CTE.PATIENT_STATUS, COUNT(*) AS total_cnt -- 'AS' is for clarity only, not required
FROM CTE
GROUP BY CTE.FACILITY_KEY, CTE.DATE, CTE.PATIENT_STATUS
/