SQL Server to Snowflake Query Conversion - sql-server

Question

I'm trying to convert this query below to Snowflake but what I came up with kept giving me an error that it couldn't conver '04/17/22' to a numeric value.
SQL:
SELECT
user_id AS u_id,
Substring(Max( CONVERT(VARCHAR(10), system_modstamp, 121) +
CASE -- Categorizing all of the team roles
WHEN team_member_role LIKE 'AM%'
OR team_member_role LIKE '%AM %'
OR team_member_role LIKE 'ASR%'
THEN 'AM Sales'
WHEN team_member_role LIKE '%fsr%'
THEN 'FSR'
WHEN team_member_role LIKE '%RSD%'
AND team_member_role NOT LIKE '%parts%'
THEN 'AC Sales'
WHEN team_member_role LIKE 'RSA%'
THEN 'AC Sales'
ELSE team_member_role
END
), 11, 99) AS team_groups, Max(system_modstamp) AS SYSTEM_MODSTAMP
FROM S_SFDC_ACCOUNT_TEAM
GROUP BY user_id
Snowflake:
SELECT
user_id AS u_id,
SUBSTR(Max( TO_VARCHAR( system_modstamp,'YYYY-MM-DD') +
CASE WHEN team_member_role LIKE 'AM%' OR team_member_role LIKE '%AM %' OR team_member_role LIKE 'ASR%' THEN 'AM Sales' WHEN team_member_role LIKE '%fsr%' THEN 'FSR' WHEN team_member_role LIKE '%RSD%' AND team_member_role NOT LIKE '%parts%' THEN 'AC Sales' WHEN team_member_role LIKE 'RSA%' THEN 'AC Sales' ELSE team_member_role END
), 11, 99) AS team_groups, Max(system_modstamp) AS SYSTEM_MODSTAMP
FROM S_SFDC_ACCOUNT_TEAM
GROUP BY user_id

Answer 1

For closure, as expressed in the comments:
The issue was using + for string concatenation, because in Snowflake you need to use || instead.
The error "couldn't convert '...' to a numeric value" shows that it tried to transform that date (into a string), and then Snowflake tried to convert it to a number for the + operation.
Thanks Pankaj and Mike!