Question

我使用了“NOT IN（select）”函数，但加载几个寄存器需要很长时间。所以我想使用LEFT JOIN改进查询，但我不知道出了什么问题。我得到了#1054 - Unknown column 'a.id_logistica' in 'on clause'。表“logistica”中的列“id_logistica”确实存在，就像在“det_log”表中一样。这是代码：

SELECT 
  a.*, a.id_logistica, 
  b.nombre username, c.placa, 
  b.nombre scliente, e.nombre ruta,
  d.nombre_con, clase 
FROM 
  logistica a,  cliente b,
  vehiculo c,  conductores d, ruta e 
LEFT OUTER JOIN 
  det_log t2 ON  t2.id_logistica = a.id_logistica
WHERE 
  a.id_cliente = b.id_cliente  AND  a.id_ruta = e.id_ruta 
  AND t2.id_logistica IS NULL AND a.id_vehiculo = c.id_vehiculo 
  AND a.id_conductor = d.id_conductor AND activo = 1 
  and finalizado = 0  AND ( a.id_ruta > 1 OR a.borrado = 9 ) 
ORDER BY 
  fecha_des DESC

Answer 1

如果你的查询正在运行，你可以试试这个：

SELECT 
    a.*, a.id_logistica, 
    b.nombre username, c.placa, 
    b.nombre scliente, e.nombre ruta,
    d.nombre_con, clase 
FROM logistica a
Left Join cliente b On b.id_cliente = a.id_cliente
Left Join vehiculo c On c.id_vehiculo = a.id_vehiculo
Left Join conductores d On d.id_conductor = a.id_conductor
Left Join ruta e On e.id_ruta = a.id_ruta
Left Join det_log t2 On t2.id_logistica = a.id_logistica
WHERE ( a.id_ruta > 1 OR a.borrado = 9 )
    And activo = 1
    And finalizado = 0
    And t2.id_logistica IS NULL 
ORDER BY fecha_des DESC

但是，如果我看错了。它没有意义列＆＃34; id_logistica＆＃34;在表格＆＃34; logistica＆＃34;。

请查看表格中的栏目＆＃34; logistica＆＃34;。

desc logistica;

也许，你写错了。

未知列左加入MySQL

1 个答案: