將多個表列添加到多個表中

Question

自從使用SSRS和SQL以來已經有好幾年了，所以我對此補救措施和措辭不佳的問題事先表示歉意。

我有一個表，事件，其中包括2列，開瓶器和所有者（都是整數）。這些列與用戶表相關，我想從中檢索用戶名。我可以加入這些表格，但是我如何才能獲取用戶名作爲首選項和所有者，以便將其包含在我的報告中？

SELECT 
    TST_INCIDENT.OPENER_ID AS Logged_By, 
    TST_INCIDENT.OWNER_ID AS Assignee, 
    TST_INCIDENT.INCIDENT_ID AS Defect_ID, 
    TST_INCIDENT.NAME AS Defect_Title, 
    TST_INCIDENT.DESCRIPTION AS Defect_Desc, 
    TST_USER.USER_NAME 
FROM 
    TST_USER 
INNER JOIN 
    TST_INCIDENT ON TST_USER.USER_ID = TST_INCIDENT.OPENER_ID 
       AND TST_USER.USER_ID = TST_INCIDENT.OWNER_ID 

Answer 1

您將爲每個ID加入一次用戶表。如果ID可能丟失，請將它們更改爲左連接。

SELECT 
    TST_INCIDENT.OPENER_ID AS Logged_By 
    ,TST_INCIDENT.OWNER_ID AS Assignee 
    ,TST_INCIDENT.INCIDENT_ID AS Defect_ID 
    ,TST_INCIDENT.NAME AS Defect_Title 
    ,TST_INCIDENT.DESCRIPTION AS Defect_Desc 
    ,A.USER_NAME as OPENER_USER_NAME 
    ,B.USER_NAME as OWNER_USER_NAME 
FROM TST_INCIDENT 
INNER JOIN TST_USER A ON A.USER_ID = TST_INCIDENT.OPENER_ID 
INNER JOIN TST_USER B ON B.USER_ID = TST_INCIDENT.OWNER_ID