Obtenir erreur - Chaque table dérivée doit avoir sa propre erreur alias

Question

La requête est d'obtenir les dates pour chaque table, j'ai vérifié mon code, mais il reste une erreur de « Chaque table dérivée doit avoir sa propre erreur alias »

SELECT T.* 
    FROM (
    SELECT DISTINCT(DATE_FORMAT(p.deliverDate, '%M')) as PDate 
    FROM piglet_po p 
    WHERE p.raiserID = '0025' AND p.rotationNo = '3' 

     AND p.deliverDate NOT IN 
     (SELECT DISTINCT(DATE_FORMAT(f.issuedDate, '%M')) as FDate 
      FROM feed_slip f    
      WHERE f.raiserID = '0025' AND f.issuedDate BETWEEN '2012-06-01' AND '2012-11-01'     

      AND f.issuedDate NOT IN 
      (SELECT DISTINCT(DATE_FORMAT(v.issuedDate, '%M')) as VDate 
       FROM vet_slip 
       WHERE v.raiserID = '0025' AND v.issuedDate BETWEEN '2012-06-01' AND '2012-11-01' 

      AND v.issuedDate NOT IN 
      (SELECT DISTINCT(DATE_FORMAT(w.issuedDate, '%M')) as WDate 
       FROM weight_slip w 
       WHERE w.raiserID = '0025' AND w.issuedDate BETWEEN '2012-06-01' AND '2012-11-01'          
      ) 
     ) 

    ) T 

Answer 1

Vous avez oublié l'alias v dans:

 SELECT DISTINCT(DATE_FORMAT(v.issuedDate, '%M')) as VDate 
      FROM vet_slip 
     WHERE v.raiserID = '0025' AND 
       v.issuedDate BETWEEN '2012-06-01' AND '2012-11-01' 

Il y avait aussi une parenthèse fermante manquante, AFAICT. Si vous avez simplement laissé tomber le dernier, alors l'alias T était au mauvais endroit. J'ai supposé que c'était l'une des 'parenthèses intérieures' qui a été abandonnée.

La requête corrigée est donc:

SELECT T.* 
    FROM (SELECT DISTINCT(DATE_FORMAT(p.deliverDate, '%M')) as PDate 
      FROM piglet_po p 
     WHERE p.raiserID = '0025' AND p.rotationNo = '3' 
      AND p.deliverDate NOT IN 
       (SELECT DISTINCT(DATE_FORMAT(f.issuedDate, '%M')) as FDate 
        FROM feed_slip f    
       WHERE f.raiserID = '0025' 
        AND f.issuedDate BETWEEN '2012-06-01' AND '2012-11-01' 
        AND f.issuedDate NOT IN 
         (SELECT DISTINCT(DATE_FORMAT(v.issuedDate, '%M')) as VDate 
          FROM vet_slip v 
         WHERE v.raiserID = '0025' 
          AND v.issuedDate BETWEEN '2012-06-01' AND '2012-11-01' 
          AND v.issuedDate NOT IN 
           (SELECT DISTINCT(DATE_FORMAT(w.issuedDate, '%M')) as WDate 
            FROM weight_slip w 
           WHERE w.raiserID = '0025' 
            AND w.issuedDate BETWEEN '2012-06-01' AND '2012-11-01' 
           ) 
         ) 
       ) 
     ) T