实列:
1 SELECT 2 a.BillDate '[开票时间]', 3 a.Hdbh '[运单号]', 4 a.Status '运单状态', 5 a.DisplayStatus '运单状态字', 6 b.name '开票部门', 7 d.name '运达部门', 8 b.OrgAttributes '部门类型', 9 e.MemberProblem, 10 e.CustomerResponse, 11 e.HandleSuggestion 12 FROM 13 shipment_bill a 14 JOIN sys_organization b ON a.DepartmentId=b.id 15 JOIN shipment_transport c ON a.id=c.BillId 16 JOIN sys_organization d ON c.EndDepartment=d.id 17 JOIN (SELECT g.BillId AS BillId ,g.MemberProblem AS MemberProblem ,g.CustomerResponse AS CustomerResponse,g.HandleSuggestion AS HandleSuggestion FROM member_tracking g JOIN (SELECT BillId,MAX(Id)AS Id FROM member_tracking GROUP BY BillId) f ON f.Id=g.Id) e ON e.BillId=a.id 18 WHERE ---查询样表() 19 Status IN ( 0, 1, 2, 3 ) 20 AND a.CreateTime < '2019-12-16' 21 AND a.IsValid = 1 22 ORDER BY 23 a.BillDate
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SELECT g.BillId AS BillId ,g.MemberProblem AS MemberProblem ,g.CustomerResponse AS CustomerResponse,g.HandleSuggestion AS HandleSuggestion ---一层查询
FROM member_tracking g
JOIN
(SELECT BillId,MAX(Id)AS Id FROM member_tracking GROUP BY BillId) f ON f.Id=g.Id---查询最大值(注意显示列只有两列,两列以上才疏学浅,还不会)