Question

我在postgreSQL9.3中有数据库表名称emp_leave，例如

INSERT

Answer 1

您要聚合：

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<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"/>
    <link href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet"/>
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</form>

这假定空白为select el.emp_name, el.department, max(el.ann_leave), . . . , max(el.org_cas_lv) from emp_leave el group by el.emp_name, el.department;。

Answer 2

要消除空值并转换为单行

select
emp_name,
department,
min(ann_leave),
min(med_leave),
min(cas_leave),
min(org_ann_lv),
min(org_med_lv),
min(org_cas_lv)
from emp_leave
group by
emp_name,
department

如何在postgreSQL的一行中获取价值？

2 个答案: