[英]Convert SQL statement to SQLAlchemy
I need to convert this SQL statement to an SQLAlchemy ORM query:我需要将此 SQL 语句转换为 SQLAlchemy ORM 查询:
SELECT zone, count(fall_status)
FROM events
WHERE events.timestamp BETWEEN 1663460366 AND 1663546766
AND events.fall_status = 1
GROUP by zone
First you need to create an engine:首先你需要创建一个引擎:
from sqlalchemy import create_engine
engine = engine = create_engine('sqlite:///...')
Then you can use然后你可以使用
from sqlalchemy.sql import text
with engine.connect() as conn:
statement = text("SELECT zone, count(fall_status) from events WHERE events.timestamp BETWEEN 1663460366 AND 1663546766 AND events.fall_status = 1 GROUP by zone")
conn.execute(statement)
q = (
db.query(
Events.zone,
func.count(Events.fall_status),
)
.filter(Events.fall_status == 1)
.filter(Events.timestamp.between(to_date,from_date))
).all()
see func.count见func.count
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