mysql - 如何将状态列中的内容显示为数据库中的标题

Question

从Mysql数据库中找到下面的数据，根据这个数据，当我用手机号码统计状态时，我需要将“状态”显示为行的标题，并且“计数”应该显示在状态下方。

**cust_mob_no       status**

918072740683    unattended
918072740683    closed
918072740683    NotApplicable
918072740683    Assigned
918072740683    NotApplicable
918072740683    open
918072740683    open

如何显示如下所示的数据？

unattended  closed  NotApplicable   Assigned    open
   1          1           2           1           2

Answer 1

你可以像这样使用选择大小写

SELECT
    mobileNumber,  
    SUM(CASE WHEN (statusName='unattended') THEN 1 ELSE 0 END) AS unattended,
    SUM(CASE WHEN (statusName='closed' ) THEN 1 ELSE 0 END) AS closed,
    SUM(CASE WHEN (statusName='NotApplicable') THEN 1 ELSE 0 END) AS NotApplicable,
    SUM(CASE WHEN (statusName='Assigned') THEN 1 ELSE 0 END) AS Assigned
FROM 
    MyTable
GROUP BY 
    mobileNumber

DBFiddle Sample Code

您可以使用数据透视表。示例查询

SELECT [unattended], [closed],[NotApplicable],[Assigned],[open] FROM   
(SELECT [mobileNumber],[status] FROM MyTable )Tab1  
PIVOT  
(  
COUNT([mobileNumber]) FOR status IN ([unattended], [closed],[NotApplicable], 
[Assigned],[open])) AS Tab2  

DB Fiddle Sample Code