Question

我需要执行一个条件包含子查询的查询。那就是查询

SELECT CASE
         WHEN EXISTS (SELECT * FROM   `contatti_t_interazioni` `iz`
                      WHERE  `iz`.`id_interesse` = `i`.`id_interesse`) THEN "si"
         ELSE "no"
       end AS `Interazioni`
FROM   ((((`contatti_t_interessi` `i`
          LEFT JOIN `contatti_t_proposte` `p`         ON(( `i`.`id_interesse` = `p`.`id_interesse` )))
          LEFT JOIN `v_anagrafica_utenti` `a`         ON(( `i`.`id_utente` = `a`.`id` )))
          LEFT JOIN `contatti_tlk_statointeresse` `si ON(( `i`.`stato_interesse` = `si`.`id_statointeresse` )))
          LEFT JOIN `v_anagrafica_utenti` `ar`        ON(( `i`.`id_referente` = `ar`.`id` )))
WHERE  ( `a`.`id` > 0 )
GROUP  BY `i`.`id_interesse`
UNION
SELECT CASE
         WHEN EXISTS (SELECT *
                      FROM   `contatti_t_interazioni` `iz`
                      WHERE  `iz`.`id_interesse` = `i`.`id_interesse`) THEN "si"
         ELSE "no"
       end AS `Interazioni`
FROM   ((((`contatti_t_interessi` `i`
          LEFT JOIN `contatti_t_proposte` `p`          ON(( `i`.`id_interesse` = `p`.`id_interesse` )))
          LEFT JOIN `contatti_t_esteri` `ce`           ON(( `i`.`id_contattoestero` = `ce`.`id_contattoestero` )))
          LEFT JOIN `contatti_tlk_statointeresse` `si` ON(( `i`.`stato_interesse` = `si`.`id_statointeresse` )))
          LEFT JOIN `v_anagrafica_utenti` `ar`         ON(( `i`.`id_referente` = `ar`.`id` )))
WHERE  ( `ce`.`id_contattoestero` > 0 )
GROUP  BY `i`.`id_interesse`;

当我尝试执行该查询时，它不会显示任何错误，但查询执行永远不会结束。

出什么问题了？我之所以使用联合，是因为由于查询时间过长，我隐藏了其他选择属性。

对不起，我的英语，希望您能理解我的要求。

谢谢

执行永远不会在查询中以case条件在select中结束

0 个答案: