sql-timestamp

For a given Date object, capture it's value relevant to GMT timezone

╄→гoц情女王★ 提交于 2021-02-05 10:39:34
问题 In my application running on Java 8, I have a Date object. The timezone for this object depends on the client's location. At one particular point, I need to convert this Date to GMT so that it could be comparable to a value that I access from the DB. I tried SimpleDateFormat and ZonedDateTime, but there's a pain-point. These API's provide me GMT time in String values, which is perfectly fine. However, once I parse it and assign it to a Date object, it is back to my local timezone! For Ex:

For a given Date object, capture it's value relevant to GMT timezone

主宰稳场 提交于 2021-02-05 10:38:29
问题 In my application running on Java 8, I have a Date object. The timezone for this object depends on the client's location. At one particular point, I need to convert this Date to GMT so that it could be comparable to a value that I access from the DB. I tried SimpleDateFormat and ZonedDateTime, but there's a pain-point. These API's provide me GMT time in String values, which is perfectly fine. However, once I parse it and assign it to a Date object, it is back to my local timezone! For Ex:

Applying unique constraint of date on TIMESTAMP column in postgresql

前提是你 提交于 2021-01-29 08:31:02
问题 I have a postgresql table as CREATE TABLE IF NOT EXISTS table_name ( expiry_date DATE NOT NULL, created_at TIMESTAMP with time zone NOT NULL DEFAULT CURRENT_TIMESTAMP(0), CONSTRAINT user_review_uniq_key UNIQUE (expiry_date, created_at::date) -- my wrong attempt of using :: ) I want to put uniue constraint on this table in such a way that expiry_date and date of created_at should be unique. Problem is created_at column is timestamp not date. so is there any way to put unique constraint such

Unable to figure out accurate query to get timestamps for my report…for each user

为君一笑 提交于 2021-01-29 05:43:55
问题 I am trying to write a report based on data of users logging into a session. I need to be able to get a full session time from when the first person joins the meeting to when the last person leaves. When someone joins a meeting it is logged as, "Initialize-Load Video chat Window" There are 2 ways to close the meeting but one way is being logged. - There is an "End Chat" button that the user can use and that is logged as, "Video Chat-End Chat" - If the user does not use that button and just

Selecting rows with constrained time-stamp differences (in seconds) in tables in SQL

寵の児 提交于 2020-11-29 21:40:35
问题 I have a table called visit_times in SQL like this name time_stamp Allen 2015-02-13 07:10:54 Allen 2015-02-13 07:10:58 Allen 2015-02-13 07:11:02 Mary 2015-02-17 10:45:33 Mary 2015-02-17 10:45:39 Mary 2015-02-17 10:45:43 ... I need to select names from "name" column for which all the row-consecutive differences (in second) in the "time_stamp" column equals a certain value. Using the LAG() command I have tried to code it up as follows WITH cte AS ( SELECT name, DATEDIFF(second, LAG(time_stamp)

Selecting rows with constrained time-stamp differences (in seconds) in tables in SQL

孤街醉人 提交于 2020-11-29 21:34:49
问题 I have a table called visit_times in SQL like this name time_stamp Allen 2015-02-13 07:10:54 Allen 2015-02-13 07:10:58 Allen 2015-02-13 07:11:02 Mary 2015-02-17 10:45:33 Mary 2015-02-17 10:45:39 Mary 2015-02-17 10:45:43 ... I need to select names from "name" column for which all the row-consecutive differences (in second) in the "time_stamp" column equals a certain value. Using the LAG() command I have tried to code it up as follows WITH cte AS ( SELECT name, DATEDIFF(second, LAG(time_stamp)

Selecting rows with constrained time-stamp differences (in seconds) in tables in SQL

余生长醉 提交于 2020-11-29 21:29:51
问题 I have a table called visit_times in SQL like this name time_stamp Allen 2015-02-13 07:10:54 Allen 2015-02-13 07:10:58 Allen 2015-02-13 07:11:02 Mary 2015-02-17 10:45:33 Mary 2015-02-17 10:45:39 Mary 2015-02-17 10:45:43 ... I need to select names from "name" column for which all the row-consecutive differences (in second) in the "time_stamp" column equals a certain value. Using the LAG() command I have tried to code it up as follows WITH cte AS ( SELECT name, DATEDIFF(second, LAG(time_stamp)

SqlAlchemy TIMESTAMP 'on update' extra

故事扮演 提交于 2020-08-25 03:17:18
问题 I am using SqlAlchemy on python3.4.3 to manage a MySQL database. I was creating a table with: from datetime import datetime from sqlalchemy import Column, text, create_engine from sqlalchemy.types import TIMESTAMP from sqlalchemy.dialects.mysql import BIGINT from sqlalchemy.ext.declarative import declarative_base Base = declarative_base() class MyClass(Base): __tablename__ = 'my_class' id = Column(BIGINT(unsigned=True), primary_key=True) created_at = Column(TIMESTAMP, default=datetime.utcnow,

SqlAlchemy TIMESTAMP 'on update' extra

对着背影说爱祢 提交于 2020-08-25 03:17:07
问题 I am using SqlAlchemy on python3.4.3 to manage a MySQL database. I was creating a table with: from datetime import datetime from sqlalchemy import Column, text, create_engine from sqlalchemy.types import TIMESTAMP from sqlalchemy.dialects.mysql import BIGINT from sqlalchemy.ext.declarative import declarative_base Base = declarative_base() class MyClass(Base): __tablename__ = 'my_class' id = Column(BIGINT(unsigned=True), primary_key=True) created_at = Column(TIMESTAMP, default=datetime.utcnow,

SqlAlchemy TIMESTAMP 'on update' extra

可紊 提交于 2020-08-25 03:16:04
问题 I am using SqlAlchemy on python3.4.3 to manage a MySQL database. I was creating a table with: from datetime import datetime from sqlalchemy import Column, text, create_engine from sqlalchemy.types import TIMESTAMP from sqlalchemy.dialects.mysql import BIGINT from sqlalchemy.ext.declarative import declarative_base Base = declarative_base() class MyClass(Base): __tablename__ = 'my_class' id = Column(BIGINT(unsigned=True), primary_key=True) created_at = Column(TIMESTAMP, default=datetime.utcnow,