如何将以下 python 表达式转换为 postgesql?
>>> ','.join([30 for x in range(3)])
30,30,30
我有列表:
id | entry | type | size
1 10 0 10
2 20 0 10
3 30 1 10
4 30 2 15
我想这样查询它:
SELECT id,
CASE WHEN type = 1
THEN
--For entry 30 and size 10 (300) - get 150,90,60
WHEN type = 2
THEN
--For entry 10 and size 15 (150) - get 30,30,30,30,30
ELSE
entry*size
END
FROM table;
UPD 预期结果:
id | prize_pool
1 | 100
2 | 200
3 | 150,90,60
4 | 30,30,30,30,30
python中的UPD2 等效函数:
def prize_pool(entry,type,size):
prize = entry*size
if type == 0:
return [prize]
if type == 1:
return [prize * x for x in [0.5,0.3,0.2]]
if type == 2:
return [prize/int(size/3) for x in range(int(size/3))]