需要在MySQL中使用别名内连接列

Question

SELECT AlertTypeID FROM incidentalert 
INNER JOIN incidentalerttype 
ON incidentalert.alerttypeid=incidentalerttype.AlertTypeID
WHERE IncidentID=111210

AlertTypeID是表1中的列,表2中是主键.我如何消除歧义？

Answer 1

试试这个:

SELECT 
    ia.AlertTypeID 
FROM
    incidentalert ia 
    inner join incidentalerttype iat on iat.alerttypeid=ia.AlertTypeID
where 
    ia.IncidentID=111210