psycopg2 datetime

psycopg2 datetime

• 軟體兄弟
• psycopg
• 文章資訊

import psycopg2 # Connect to an existing database >>> conn = psycopg2.connect("dbname=test user=postgres") # Open a cursor to perform database operations ..... The PostgreSQL type timestamp with time zone (a.k.a. timestamptz ) is conve, def insertLocalDB(): # Open a cursor to perform database operations cur = conn.cursor() cur.execute("INSERT INTO test_table (buildingID,datetime) VALUES(%s, now() )", ("01", )) # Make the changes to the database persistant conn.commit, q = """ select created_at from mytable t and t.created_at < %(createdat)s """ read.execute(q, 'createdat' : createdat}). Try this way, Psycopg2 will do everything by itself ...,By using the PostgreSQL Python module psycopg2, I want to find rows that have an end time that falls before some timestamp. I tried to do this with a cursor.execute(…) on a SQL query with … where end_time < %s , where %s replaced by a datetime.datetime, Have you red "Psycopg2 usage"? If not, don't hesitate to do so. Warning Never, never, NEVER use Python string concatenation (+) or string parameters interpolation (%) to pass variables to a SQL query string. Not even at gunpoint. Proper way, First of all, what did you expect to be returned from a field with a "date" data type? Explicitly, date, and driver obviously performs as expected here. So your task is actually to find out how to say json encoder to encode instances of datetim, Python's datetime objects are automatically adapted into SQL by psycopg2 , you don't need to stringify them: cursor.execute("INSERT INTO articles VALUES (%s, %s)", (title, datetime_obj)). To read the rows returned by a SELECT you can us, You can specify the values in the query, cur.execute("""SELECT * FROM people_counter WHERE time_stamp BETWEEN date '2015-06-01' and date '2015-06-30';"""). or as parameters. import datetime as dt cur.execute(

相關軟體 PostgreSQL 資訊

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