3

我正在创建一个函数，我需要根据参数的值在两个句子之间进行选择（PTIPO）

下面是我的代码

SELECT SUM(
    CASE PTIPO
      WHEN 0 THEN (CASE WHEN (A.NT = 0) THEN A.VALOR ELSE 0 END)
      WHEN 1 THEN (CASE WHEN (A.NT = 1) THEN A.VALOR ELSE 0 END)
      WHEN 2 THEN (CASE WHEN (A.NT = 1) THEN A.VALOR ELSE -A.VALOR END) 
    END)
INTO nresp
FROM mov_caja a
JOIN enc_movp b ON a.docid = b.docid
JOIN c_caja c ON a.cajaid = c.cajaid
WHERE c.cajaid = pcajaid AND( 
    CASE WHEN(PTIPO = 2) --this is what causes the issue.
    THEN
    b.cod_compro = ncompini OR (b.fecha_mov BETWEEN pfecha_ini AND pfecha_fin)
    ELSE
    b.cod_compro != ncompini AND b.fecha_mov BETWEEN pfecha_ini AND pfecha_fin
    END);

错误是“缺少关键字”，但我知道问题是最后一个案例。我还能如何在句子之间进行选择。这种情况是正确的方法还是我应该使用另一种说法？

4

2 回答 2

3

case 可以返回一个值，但不能返回一个表达式。这应该可以解决问题，尽管我觉得它甚至可以更简单：

SELECT SUM(
    CASE PTIPO
      WHEN 0 THEN (CASE WHEN (A.NT = 0) THEN A.VALOR ELSE 0 END)
      WHEN 1 THEN (CASE WHEN (A.NT = 1) THEN A.VALOR ELSE 0 END)
      WHEN 2 THEN (CASE WHEN (A.NT = 1) THEN A.VALOR ELSE -A.VALOR END) 
    END)
INTO nresp
FROM mov_caja a
JOIN enc_movp b ON a.docid = b.docid
JOIN c_caja c ON a.cajaid = c.cajaid
WHERE 
  c.cajaid = pcajaid AND
  ( 
    (PTIPO = 2 and (b.cod_compro = ncompini OR b.fecha_mov BETWEEN pfecha_ini AND pfecha_fin))
OR
    (PTIPO <> 2 and (b.cod_compro != ncompini AND b.fecha_mov BETWEEN pfecha_ini AND pfecha_fin))
  )
于 2013-01-26T15:46:20.300 回答
1

试试这个：

WHERE c.cajaid = pcajaid AND
       (
          PTIPO = 2
             AND (
                    b.cod_compro = ncompini
                    OR b.fecha_mov BETWEEN pfecha_ini AND pfecha_fin
                 )
  OR
         PTIPO != 2
             AND (
                   b.cod_compro != ncompini
                   AND b.fecha_mov BETWEEN pfecha_ini AND pfecha_fin
                 )
       )
于 2013-01-26T15:48:41.397 回答