从其他表生成表数据

Question

我正在使用以下脚本为表“患者”生成模拟数据：

WITH vars (tenantId, patientCount) as (
  values (5, 30)
)
INSERT INTO patient (tenant_id, id, name)
SELECT 
  tenantId AS tenant_id, 
  gs AS id, 
  CONCAT('Patient_', row_number() OVER ()) AS name 
FROM vars, generate_series(0, 0 + patientCount) AS gs;

结果：

pk  | tenant_id | id |   name    
------+-----------+----+-----------
 3811 |         5 | 0  | Patient_1
 3812 |         5 | 1  | Patient_2
 3813 |         5 | 2  | Patient_3
 3814 |         5 | 3  | Patient_4
 3815 |         5 | 4  | Patient_5

接下来我想用这些列将数据生成到“治疗”表中：

pk (autogenerated)
id (unique)
patient_pk (from the patient table above)

我应该采取什么方法来完成这项任务？

Answer 1

你可以这样做，将数据生成到治疗表中

insert into treatment (id, patient_pk)
select id::int8, 3811+round(random() * 31)::int8 as patient_pk
from generate_series(1, 50) as id
where 3811+round(random() * 31)::int8 in (select pk from patient);

拨弄测试