更改一行的值并在 SQL 中添加一个总行

Question

For performance reasons, I have to adapt some of my SQL queries. Here's my query and its result:

SELECT 
    CODACT, 
    SUM(CASE WHEN etasup = 10 THEN CUMCOL END) AS aprep, 
    SUM(CASE WHEN etasup = 20 THEN CUMCOL END) AS encours, 
    SUM(CASE WHEN etasup > 20 THEN CUMCOL END) AS prepares, 
    SUM(CUMCOL) AS total 
FROM 
    FGE50NEUV1.GESUPE 
WHERE 
    TYPSUP = '1' 
    AND (DATLIV >= ` + date(0) +` 
         AND DATLIV <= ` + date(addDays) + `) 
GROUP BY 
    CODACT

Result:

[
  {
    CODACT: 'AUA',
    APREP: 6503,
    ENCOURS: 244,
    PREPARES: 30180,
    TOTAL: 36927
  },
  {
    CODACT: 'AUF',
    APREP: null,
    ENCOURS: null,
    PREPARES: 73,
    TOTAL: 73
  },
  {
    CODACT: 'LID',
    APREP: 12597,
    ENCOURS: 128,
    PREPARES: 21556,
    TOTAL: 34281
  },
  {
    CODACT: 'MAT',
    APREP: 410,
    ENCOURS: null,
    PREPARES: 5059,
    TOTAL: 5469
  }
]

I would like to merge the two rows "AUA" and "AUF" and change the merged row name to "Auchan", and then add a row with CODACT "TOTAL" which contains all the SUM of previous values

Answer 1

First problem is easy - replace CODACT with case when CODACT in ('AUA', 'AUF') then 'Auchan' else CODACT end , both in SELECT (you need to add alias as CODACT there) and GROUP BY parts.

Second part (add row with total) is most easily solved by CTE:

with CTE as (SELECT 
    CODACT, 
    SUM(CASE WHEN etasup = 10 THEN CUMCOL END) AS aprep, 
    SUM(CASE WHEN etasup = 20 THEN CUMCOL END) AS encours, 
    SUM(CASE WHEN etasup > 20 THEN CUMCOL END) AS prepares, 
    SUM(CUMCOL) AS total 
FROM 
    FGE50NEUV1.GESUPE 
WHERE 
    TYPSUP = '1' 
    AND (DATLIV >= ` + date(0) +` 
         AND DATLIV <= ` + date(addDays) + `) 
GROUP BY 
    CODACT
)
select CODACT, aprep, encours, prepares, total
from CTE
union all
select 'TOTAL', sum(aprep), sum(encours), sum(prepares), sum(total)
from CTE

You can combine both these improvements. I didn't check syntax, sorry:)