AS400 - 为什么标记 *, ？ 无效？ 使用 STRSQL 运行查询的替代方法是什么 - SQL 交互式会话？

Question

In AS400, How can I run this query using STRSQL?

For the below query getting the following error message instead returning results.

"Token, was not valid. Valid tokens: FROM INTO."

Code Snippet for Original Query:

WITH cte AS ( SELECT *, 
    !SUM(status != 'INACTIVE') OVER (PARTITION BY loc_code, user_id, service_area, service_sector) only_inactive,
    ROW_NUMBER() OVER (PARTITION BY loc_code, user_id, service_area, service_sector ORDER BY last_changed DESC) rn
    FROM test )
              
SELECT * 
FROM cte
WHERE only_inactive AND rn = 1

After checking, the query I found the problem is the SELECT statement inside WITH clause. I don't know why this error is there? Unable to find a possible way to solve this issue.

Now, I tried to remove * from the select statement inside WITH clause, somehow avoided this error. After executing my updated query again, I am getting same kind but a different error message.

Token. was not valid: Valid tokens? ( + * -: . DAY INF LAG NAN RID ROW RRN CASE CAST CHAR DATE DAYS.

Code Snippet for Updated Query:

WITH cte AS ( SELECT !SUM(status != 'INACTIVE') OVER (PARTITION BY loc_code, user_id, service_area, 
    service_sector) only_inactive,
    ROW_NUMBER() OVER (PARTITION BY loc_code, user_id, service_area, service_sector ORDER BY last_changed 
    DESC) rn
    FROM test )
              
SELECT * 
FROM cte
WHERE only_inactive AND rn = 1

I tried:

Instead of. token I tried using <> and ¬= but it didn't help me in both cases. When I tried to run my code I encountered the same error message but now with <> and ¬= tokens.

Expected Result:

I want to return all records satisfying the logic given in the query with all columns in my table.

Could someone please tell me how to solve this issue?

---

I tried the following updated query just to test whether it's working without. or NOT token or not.

WITH cte AS ( SELECT test.*, 
    SUM(status < 'INACTIVE') OVER (PARTITION BY loc_code, user_id, service_area, service_sector) only_inactive,
    ROW_NUMBER() OVER (PARTITION BY loc_code, user_id, service_area, service_sector ORDER BY last_changed DESC) rn
    FROM test )
              
SELECT * 
FROM cte
WHERE only_inactive AND rn = 1

I expected this query must have listed some results but this time I get this error message.

Token < was not valid. Valid tokens: ),.

I think the problem is with tokens. Not sure what.

Answer 1

Try writing the query like this:

WITH cte AS (
      SELECT t.*, 
             MIN( status = 'INACTIVE') OVER (PARTITION BY loc_code, user_id, service_area, service_sector) as only_inactive,
             ROW_NUMBER() OVER (PARTITION BY loc_code, user_id, service_area, service_sector ORDER BY last_changed DESC) as rn
      FROM test t
     )

Here is a db<>fiddle showing that this syntax works in DB2.

Note that the types of the columns should not matter for the syntax error you are seeing.