Inserting a Date data - sql

Question

so I have this table
RPG_RETCON (
UNIQUE_ID VARCHAR2(100 BYTE),
CONTAINER VARCHAR2(100 BYTE),
DATA_POINT_NAME VARCHAR2(100 BYTE),
SOURCE_VALUE VARCHAR2(100 BYTE),
CSS_VALUE VARCHAR2(100 BYTE),
STATUS VARCHAR2(100 BYTE)
)
And I I'm trying to insert this select statement into that table.
INSERT INTO RPG_RETCON
(SELECT A.POOL_CUSIP_ID AS UNIQUE_ID,
'1_13_1C' AS CONTAINER,
'SECU_ACTL_STLM_DT' AS COLUMN_NAME1,
TO_CHAR(A.SECU_ACTL_STLM_DT),
TO_CHAR(B.SECU_ACTL_STLM_DT),
CASE
WHEN A.SECU_ACTL_STLM_DT = B.SECU_ACTL_STLM_DT
THEN
'PASS'
ELSE
'FAIL'
END
AS STATUS
FROM POOL_1_13_1C_TRGT A
LEFT JOIN POOL_1_13_1C_CSS B ON A.POOL_CUSIP_ID = B.POOL_CUSIP_ID);
Now the problem is that SECU_ACTL_STLM_DT is a date field and when I try to do the inserts, I get an invalid number error. If I take away the TO_CHAR to just A.SECU_ACTL_STLM_DT,
B.SECU_ACTL_STLM_DT,
I get invalid month.
Note: I absolutely cannot change
SOURCE_VALUE VARCHAR2(100 BYTE)
CSS_VALUE VARCHAR2(100 BYTE)
-- Within the table structure...
They need to be VARCHAR2 Data types.
Are there any suggestions to where I can insert this select statement error free?

Answer 1

I think your code should work. However, I would list the columns explicitly and add date formats for the insert. Perhaps this will help:
INSERT INTO RPG_RETCON(UNIQUE_ID, CONTAINER, COLUMN_NAME1, SOURCE_VALUE, CSS_VALUE, STATUS)
SELECT A.POOL_CUSIP_ID AS UNIQUE_ID, '1_13_1C' AS CONTAINER,
'SECU_ACTL_STLM_DT' AS COLUMN_NAME1,
TO_CHAR(A.SECU_ACTL_STLM_DT, 'YYYY-MM-DD'),
TO_CHAR(B.SECU_ACTL_STLM_DT, 'YYYY-MM-DD'),
(CASE WHEN A.SECU_ACTL_STLM_DT = B.SECU_ACTL_STLM_DT
THEN 'PASS'
ELSE 'FAIL'
END) AS STATUS
FROM POOL_1_13_1C_TRGT A LEFT JOIN
POOL_1_13_1C_CSS B
ON A.POOL_CUSIP_ID = B.POOL_CUSIP_ID;
It is possible that one of the SECU_ACTL_STLM_DT columns is not a date and the comparison is failing.