数据库操作小记

PG之最近的年月日小时查询

SELECT * from pool where published_at >= CURRENT_DATE - INTERVAL '6 months' order by published_at desc 
#years、months、days、hours、minutes

ORM and、or、以及其他查询的嵌套

or_clause = []
for p in content:
    and_clause = [P.chain == p["chain"]]
    if p.get("min") and p.get("max"):
        and_clause.append(P.liquidity.between(p["min"], p["max"]))
    elif p.get("min"):
        and_clause.append(P.liquidity >= p["min"])
    elif p.get("max"):
        and_clause.append(P.liquidity <= p["max"])

    or_clause.append(and_(*and_clause))
pool_info = pool_info.filter(or_(*or_clause))