Question

表：t1

Year    Project_Estimate    WorkStation_Code
null    159610              Totals
117825  null                Totals
null    1234                Data
3345    null                Data

预期输出

Year    Project_Estimate    WorkStation_Code
117825  159610              Totals
3345    1234                Data

请帮我解决此问题。

Answer 1

试试这个：

select max(Year), max(Project_Estimate), WorkStation_Code
from t1
group by WorkStation_Code

Answer 2

您可以通过聚合执行此操作：

select max(Year) as year, max(Project_Estimate) as Project_Estimate,
       WorkStation_Code
from table t
group by WorkStation_Code;

Answer 3

您可以简单地使用聚合函数，假设您只有两行要合并：查询将如下所示：

 select max(Year) as year,max(Project_Estimate) as Project_Estimate,
       WorkStation_Code
 from myTable
 group by WorkStation_Code;

合并SQL中的多行

3 个答案: