Bonjour @ tous

Voici ma requête SQL :
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SELECT EL1, EL2, EL3, SUM(ENGAGE) AS ENGAGE, SUM(BUDGET) AS BUDGET, SUM(REEL) AS REEL, sum(BUDGET-REEL-ENGAGE) as DISPO, sum((BUDGET-REEL-ENGAGE)/BUDGET) as POURCENTAGEDISPO

FROM     
    (
        SELECT     
            el1 AS EL1, 
            el2 AS EL2, 
            el3 AS EL3, 
            0 AS ENGAGE, 
            SUM(full_value) AS BUDGET, 
            0 AS REEL,
            0 as DISPO,
            0 as POURCENTAGEDISPO
                  FROM          
                          dbo.oas_balance
                  WHERE      (cmpcode = 'SOC-A') AND (yr = '2009') AND (balcode = 'BUD-INITIAL') AND (repbasis = 7)
                  GROUP BY el1, el2, el3

                  UNION

                  SELECT     
                          el1 AS EL1, 
                          el2 AS EL2, 
                          el3 AS EL3, 
                          0 AS ENGAGE, 
                          0 AS BUDGET, 
                          SUM(full_value) AS REEL,
            0 as DISPO,
            0 as POURCENTAGEDISPO
                  FROM     
                          dbo.oas_balance AS oas_balance_2
                  WHERE     (cmpcode = 'SOC-A') AND (yr = '2009') AND (balcode = 'REEL') AND (repbasis = 7)
                  GROUP BY el1, el2, el3

                  UNION

                  SELECT     
                          el1 AS EL1, 
                          el2 AS EL2, 
                          el3 AS EL3, 
                          SUM(full_value) AS ENGAGE, 
                          0 AS BUDGET, 
                          0 AS REEL,
            0 as DISPO,
            0 as POURCENTAGEDISPO
                  FROM         
                           dbo.oas_balance AS oas_balance_1
                  WHERE     (cmpcode = 'SOC-A') AND (yr = '2009') AND (balcode = 'ENGAGEMENT') AND (repbasis = 7)
                  GROUP BY el1, el2, el3) AS x
GROUP BY EL1, EL2, EL3
ORDER BY EL3, EL1, EL2SELECT     
    EL1, 
    EL2, 
    EL3, 
    SUM(ENGAGE) AS ENGAGE, 
    SUM(BUDGET) AS BUDGET, 
    SUM(REEL) AS REEL,
    sum(BUDGET-REEL-ENGAGE) as DISPO,
    sum((BUDGET-REEL-ENGAGE)/BUDGET) as POURCENTAGEDISPO

FROM     
    (
        SELECT     
            el1 AS EL1, 
            el2 AS EL2, 
            el3 AS EL3, 
            0 AS ENGAGE, 
            SUM(full_value) AS BUDGET, 
            0 AS REEL,
            0 as DISPO,
            0 as POURCENTAGEDISPO
                  FROM          
                          dbo.oas_balance
                  WHERE      (cmpcode = 'SOC-A') AND (yr = '2009') AND (balcode = 'BUD-INITIAL') AND (repbasis = 7)
                  GROUP BY el1, el2, el3

                  UNION

                  SELECT     
                          el1 AS EL1, 
                          el2 AS EL2, 
                          el3 AS EL3, 
                          0 AS ENGAGE, 
                          0 AS BUDGET, 
                          SUM(full_value) AS REEL,
            0 as DISPO,
            0 as POURCENTAGEDISPO
                  FROM     
                          dbo.oas_balance AS oas_balance_2
                  WHERE     (cmpcode = 'SOC-A') AND (yr = '2009') AND (balcode = 'REEL') AND (repbasis = 7)
                  GROUP BY el1, el2, el3

                  UNION

                  SELECT     
                          el1 AS EL1, 
                          el2 AS EL2, 
                          el3 AS EL3, 
                          SUM(full_value) AS ENGAGE, 
                          0 AS BUDGET, 
                          0 AS REEL,
            0 as DISPO,
            0 as POURCENTAGEDISPO
                  FROM         
                           dbo.oas_balance AS oas_balance_1
                  WHERE     (cmpcode = 'SOC-A') AND (yr = '2009') AND (balcode = 'ENGAGEMENT') AND (repbasis = 7)
                  GROUP BY el1, el2, el3) AS x
GROUP BY EL1, EL2, EL3
ORDER BY EL3, EL1, EL2


Mon pb est sur la ligne en début de requête : sum((BUDGET-REEL-ENGAGE)/BUDGET) as POURCENTAGEDISPO.

En effet parfois BUDGET = 0 donc j'ai une division par zéro.

Comment puis éviter cela à partir de ma requête ?

Merci d'avance