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美好的一天!錯誤CONCAT MySQL - 沒有concat 2或更多值
我試圖執行後續腳本:上表
SELECT
concat_ws(", ",if(dep.id_departamento=0,"",ifnull(dep.descripcion,"")),
if(mun.id_municipio=0,"",ifnull(mun.descripcion,"")) ,
if(ifnull(vi.zona ,0)=0,"", cast(vi.zona as char))) as concatAddress
FROM visados vi
left join municipios mun on mun.id_municipio = vi.id_municipio
left join departamentos dep on dep.id_departamento = vi.id_departamento
的信息:
Visados - 六
+-------+--------------------+-----------------+---------+
| id | id_departamento | id_municipio | zona |
+-------+--------------------+-----------------+---------+
| 1 | 1 | 1 | 5 |
+-------+--------------------+-----------------+---------+
Municipios - 門
+------------------+---------------+
| id_municipio | descripcion |
+------------------+---------------+
| 1 | chimaltenango |
+------------------+---------------+
Departamentos - DEP
+---------------------+---------------+
| id_departamento | descripcion |
+---------------------+---------------+
| 1 | chimaltenango |
+---------------------+---------------+
正確的結果應該是:
+------------------------------------+
| concatAddress |
+------------------------------------+
| chimaltenango, chimaltenango, 5 |
+------------------------------------+
但我的結果是唯一的:
+------------------+
| concatAddress |
+------------------+
| chimaltenango |
+------------------+
沒有的毗連的其他2個值的字段。
發生了什麼事?
LocalServer:MySQL 5.6.25版本
謝謝!
我試過你的查詢並得到正確的結果:http://www.sqlfiddle.com/#99/4d0ac3/1 – Barmar
太奇怪了。我在鏈接中執行相同的信息到我的本地服務器和生產服務器,並且我得到了同樣的錯誤。 –
不應該'mun.id_departmento'爲'dep.id_departmento'?您並不需要將別名放在表格圖中,而是將表名稱放在表格中。 – Barmar