mysql - SQL Shortel 放弃呼叫查询

Question

我想查询一个表，它似乎没有工作。有人可以帮忙吗？

SELECT     ExitReason AS CallsAbandoned
FROM         queuecall
WHERE     (ExitReason = 7) THEN
                  (ExitReason = 1 ELSE
                  (ExitReason = 0)))

我正在寻找的定义或结果是：

if {ExitReason} = 7 THEN 1 ELSE 0

我不确定如何完成正确的查询。

谢谢，阿伦

Answer 1

以下是您正在寻找的内容：

SELECT CASE WHEN ExitReason = 7 
       THEN 1 
       ELSE 0 
       END AS CallsAbandoned 
FROM queuecall

或者，如果您想要计算 CASE 的结果，请尝试以下操作：

SELECT SUM(CASE WHEN ExitReason = 7 
       THEN 1 
       ELSE 0 
       END) AS CallsAbandoned 
FROM queuecall

Answer 2

试试这个：

 SELECT IF(EXITREASON = 7, 1, 0) AS CallsAbandoned 
FROM   QUEUECALL 

SQL FIDDLE：http://sqlfiddle.com/#!2/56a1d/1