mysql - 如何编辑我的 MySQL 请求最大大小写输出？

Question

当我运行以下查询时。

SELECT tblhostingaddons.id as id, 
MAX(CASE WHEN (tblcustomfields.fieldname = 'boyut') THEN tblcustomfields.fieldoptions ELSE NULL END) AS quota,
MAX(CASE WHEN (tblcustomfields.fieldname = 'adet') THEN tblcustomfields.fieldoptions ELSE NULL END) AS pc,
MAX(CASE WHEN (tblcustomfields.fieldname = 'gonderimlimiti') THEN tblcustomfields.fieldoptions ELSE NULL END) AS send,
MAX(CASE WHEN (tblcustomfields.fieldname = 'turu') THEN tblcustomfields.fieldoptions ELSE NULL END) AS type 
FROM `tblhostingaddons` 
LEFT JOIN tbladdons ON tbladdons.id = tblhostingaddons.addonid 
LEFT JOIN tblcustomfields ON tblcustomfields.relid = tbladdons.id 
WHERE tblhostingaddons.hostingid = '88'
AND tblhostingaddons.status = 'Active' 
GROUP BY tblhostingaddons.id 
ORDER BY tblhostingaddons.id

出现以下结果。但我只希望 type 出现在 epostapro 的行中。

id quota pc     send type
74 5120   1     200  epostapro
75 NULL   NULL  NULL NULL

Answer 1

尝试使用 having 子句:

SELECT tblhostingaddons.id as id, 
MAX(CASE WHEN (tblcustomfields.fieldname = 'boyut') THEN tblcustomfields.fieldoptions ELSE NULL END) AS boyut,
MAX(CASE WHEN (tblcustomfields.fieldname = 'adet') THEN tblcustomfields.fieldoptions ELSE NULL END) AS adet,
MAX(CASE WHEN (tblcustomfields.fieldname = 'gonderimlimiti') THEN tblcustomfields.fieldoptions ELSE NULL END) AS gonderimlimiti,
MAX(CASE WHEN (tblcustomfields.fieldname = 'turu') THEN tblcustomfields.fieldoptions ELSE NULL END) AS turu 
FROM `tblhostingaddons` 
LEFT JOIN tbladdons ON tbladdons.id = tblhostingaddons.addonid 
LEFT JOIN tblcustomfields ON tblcustomfields.relid = tbladdons.id 
WHERE tblhostingaddons.hostingid = '88'
AND tblhostingaddons.status = 'Active' 
GROUP BY tblhostingaddons.id 
having MAX(CASE WHEN (tblcustomfields.fieldname = 'turu') THEN tblcustomfields.fieldoptions ELSE NULL END)='epostapro'
ORDER BY tblhostingaddons.id

或者您可以从选择列表中删除 id 以及分组依据 如下所示:

SELECT  
MAX(CASE WHEN (tblcustomfields.fieldname = 'boyut') THEN tblcustomfields.fieldoptions ELSE NULL END) AS boyut,
MAX(CASE WHEN (tblcustomfields.fieldname = 'adet') THEN tblcustomfields.fieldoptions ELSE NULL END) AS adet,
MAX(CASE WHEN (tblcustomfields.fieldname = 'gonderimlimiti') THEN tblcustomfields.fieldoptions ELSE NULL END) AS gonderimlimiti,
MAX(CASE WHEN (tblcustomfields.fieldname = 'turu') THEN tblcustomfields.fieldoptions ELSE NULL END) AS turu 
FROM `tblhostingaddons` 
LEFT JOIN tbladdons ON tbladdons.id = tblhostingaddons.addonid 
LEFT JOIN tblcustomfields ON tblcustomfields.relid = tbladdons.id 
WHERE tblhostingaddons.hostingid = '88'
AND tblhostingaddons.status = 'Active'