SQL IF語句轉換為文本

Question

我有一條SQL語句，如下所示：

SELECT 
 b.pricedate AS [Price Quote Date]
,b.jobid AS [Job No.]
,a.priceid AS [Price Quote Id]
,b.headline AS [Price Quote Title]
,a.activitytext AS [Activity Text]
,a.tnum AS [No. of Hours]
,a.tsale AS [Hourly Rate]
,b.stat AS [PQ Status]
FROM JobPriceactivity a
                        INNER JOIN JobPrice AS b ON a.priceid = b.priceid
WHERE a.Activitytext LIKE '%influencer%' and jobid >= '700000'and jobid <= '709999'
ORDER BY b.jobid

這給了我以下示例：

是否可以在我的原始select語句中使用IF語句來查看PQ狀態並將代碼更改為更有意義的文本？

例如：如果IF PQ狀態= 50，然后轉換為“已批准”

任何建議或幫助，不勝感激。

Answer 1

您可以使用CASE表達式：

CASE WHEN b.stat = 50 THEN 'Approved' ELSE b.stat END AS [PQ Status]

Answer 2

用case when

b.pricedate AS [Price Quote Date]
,b.jobid AS [Job No.]
,a.priceid AS [Price Quote Id]
,b.headline AS [Price Quote Title]
,a.activitytext AS [Activity Text]
,a.tnum AS [No. of Hours]
,a.tsale AS [Hourly Rate]
,case when b.stat=50 then 'approved' 
else 'not approved'  end AS [PQ Status]
FROM JobPriceactivity a
                        INNER JOIN JobPrice AS b ON a.priceid = b.priceid
WHERE a.Activitytext LIKE '%influencer%' and jobid >= '700000'and jobid <= '709999'
ORDER BY b.jobid