如何根据 Postgres 中的一个值进行计数?
How to count based on one value in Postgres?
我有以下数据,我想对 JobName 进行分组,但我需要所有数据列。
JobName rule name …….
Job-A 1 PDF
Job-A 1 PDF
Job-A 1 PDF
Job-B 2 ADF
Job-B 2 ADF
Job-C 3 OPS
Job-D 4 NPS
Job-D 4 NPS
Job-D 4 NPS
Job-D 4 NPS
结果应该是
JobName rule name …. count
Job-A 1 PDF 3
Job-B 2 ADF 2
Job-C 3 OPS 1
Job-D 4 NPS 4
除非我遗漏了某些要求,否则您只需要按所有三列进行聚合,然后计算每组的数量:
SELECT JobName, rule, name, COUNT(*) AS count
FROM yourTable
GROUP BY JobName, rule, name;
我有以下数据,我想对 JobName 进行分组,但我需要所有数据列。
JobName rule name …….
Job-A 1 PDF
Job-A 1 PDF
Job-A 1 PDF
Job-B 2 ADF
Job-B 2 ADF
Job-C 3 OPS
Job-D 4 NPS
Job-D 4 NPS
Job-D 4 NPS
Job-D 4 NPS
结果应该是
JobName rule name …. count
Job-A 1 PDF 3
Job-B 2 ADF 2
Job-C 3 OPS 1
Job-D 4 NPS 4
除非我遗漏了某些要求,否则您只需要按所有三列进行聚合,然后计算每组的数量:
SELECT JobName, rule, name, COUNT(*) AS count
FROM yourTable
GROUP BY JobName, rule, name;