Questions tagged [timestamp]
For questions about timestamp data types and/or recording a particular point in time.
0
votes
1answer
29 views
Keep track of the last read record in MySQL
I have 2 databases in MySQL:
1) An input Latitude-Longitude_dB ('latlong_db', henceforth): It has the latitude and longitude of each reading from a GPS tracking device.
2) A Weather_db: I read the ...
0
votes
1answer
41 views
MySQL - how to get time from Unix milliseconds timestamp?
My MySQL version is 5.6; it has a FROM_UNIXTIME function. But it works for timestamps with 10 digits: 1447430881.
mysql> SELECT FROM_UNIXTIME(1447430881);
-> '2015-11-13 10:08:01'
Now ...
2
votes
2answers
159 views
Should I split timestamp parts into separate columns?
I am building a PostgreSQL database and I have created a timestamp table, where the primary key is the timestamp itself (e.g. id: Fri Apr 13 2018 15:00:19). The database is supposed to be later ...
2
votes
1answer
39 views
Oracle: Casting timestamp as date and comparing result
I don‘t really understand what cast(timestamp as date) is doing. I am on Oracle Database 11g Express Edition Release 11.2.0.2.0.
select cast(to_timestamp('20190516 08:00:00', 'yyyymmdd HH24:MI:SS') ...
1
vote
1answer
58 views
Creating index on TIMESTAMP column to use with range operators
TLDR: Can I create an index that's used by the following WHERE clause:
WHERE foo_date <@ tsrange('2018-01-01', '2018-02-01')
Let's say I have a table like this:
CREATE TABLE foo
(
foo_id ...
0
votes
0answers
31 views
In mysql system_time_zone doesn't reflects DST changes, isn't it a bug?
If a Ubuntu machine was in 'PST' timezone and on 10 march 2019 at 2:00 AM its timezone gets changed to 'PDT' timezone to accommodate DST changes then does this change is immediately reflected in ...
0
votes
0answers
15 views
How to create an optimized view that fills in sparse observations with modeled data?
I have a table of sensor observations with obs_ts timestamp, sensor_id text, sensor_val int which is partitioned by month (e.g.: observations_201903). There are approximately 150k sensors, providing ...
1
vote
1answer
217 views
Is there way to get transaction commit timestamp in Postgres?
I have data-pulling functionality that once in 5 seconds grabs all the data from Postgres table basing on modified_timestamp column. It works the following way:
SELECT * FROM my_table WHERE ...
0
votes
1answer
33 views
FUNCTION BEFORE TRIGGER INEXISTENT OPERATOR date > = double precision
In the 'pubblicazione' table I want to insert some fields of the tuple contained in the 'legge_approvata' table, but to do this the promulgation date must be in the same month and year as the date of ...
0
votes
1answer
29 views
Return hours, minutes and seconds left if column wasn't updated
I currently have this query:
UPDATE MyTable
SET next_update = now() at time zone 'utc'
WHERE next_update::timestamp < now() at time zone 'utc' - interval '1 day';
Which updates the column ...
0
votes
1answer
142 views
PostgreSQL compare a timestamp with timezone with a timestamp
How do you compare a timestamp with a timezone with a timestamp in postgresql?
I am trying to cast one of the 2 to the type of the other but it does not work for me. Eg.
Having
TS1: 2019-01-07 21:...
2
votes
1answer
37 views
Compute Leap Seconds
I use PostgreSQL 11 and have two columns. One is unix timestamp which is not aware of leap seconds and an utc timestamp which is aware of leap seconds.
Is there a way either to find the number of ...
2
votes
1answer
1k views
Incorrect datetime value: '0000-00-00 00:00:00' for column 'tmp_field_2' at row 1
I'm trying to run the following query:
INSERT INTO `user_domain_rating_days`
(
`user_domain_rating_id`,
`start`,
`...
1
vote
1answer
30 views
What happens if I load last 10 rows then next 10 after other rows are inserted?
What if I had a PHP script that had a pagination that loads last 10 rows then page two loaded next 10 in DESC order, but before loading next 10 on page 2, other 10 rows were added to the table?
What ...
4
votes
2answers
174 views
Different syntax to add/substract interval
Till now I used the following syntax to add an interval to a timestamp:
select now() + '5 year';
This worked fine till I tried to subtract the interval which results in a syntax error.
invalid ...
0
votes
2answers
79 views
WHERE clause on a TIMESTAMP column causes serious performance penalty
I have a pages and a page_views tables with 100k~ & 4M~ records respectively.
I run a query to get the top pages that have the most page_views:
select `pages`.`id`, `pages`.`host`, `pages`.`...
3
votes
1answer
457 views
“ERROR: timestamp out of range” converting epoch stored as bigint to a timestamp
I'm getting ERROR: timestamp out of range: "1.52701e+15" when trying to convert an epoch stored as a bigint into a timestamp (value is taken from a real database table):
select to_timestamp(...
0
votes
1answer
24 views
Postgresql filtering by value over rolling time period
I am newbie to postgresql and still getting my head around. I have used windows function etc. till date and yes I can make some sense.
I have got the following data set:
I need to find those ...
0
votes
1answer
29 views
I need help creating an index for timestamp
I have a query taking too long.
This is the table:
mysql> describe parking_data;
+----------------+--------------+------+-----+-------------------+----------------+
| Field | Type ...
1
vote
0answers
20 views
Query that fetchs average values over timestamp range of time, on a certain value of another pair of fields
This is the situation, over the time our table reached around 800 millions rows. And it is going to get bigger and bigger. It is a service that collects metrics of energy (voltage, power, current, etc)...
3
votes
1answer
270 views
How to compare timestamps with different time zones?
For example I have a table with timestamps:
2018-04-05 06:00:00 +01
2018-04-05 06:00:00 +00
2018-04-05 06:00:00 -01
2018-04-05 04:00:00 -01
And I want to get entries that are ...
...
3
votes
1answer
2k views
Convert YYYY-MM-DD date (without time zone) to unix timestamp in Postgres
I've got a column of type date with the following value format: YYYY-MM-DD (eg. 2018-08-03). I want to get the unix timestamp equivalent of the dates, but without the timezone.
F.e. the date 2018-08-...
1
vote
2answers
90 views
How can I use Spatial Indexes for timestamps (non-spatial 1d data)?
I'm using MySQL 8.0. I have some table containing TIMESTAMP column and I need to select within TIMESTAMP range:
SELECT *
FROM t_tbl
WHERE ts BETWEEN @someDate1 AND @someDate2
I want to make this ...
2
votes
1answer
597 views
Error while inserting into array of timestamps
Im using postgres 10.1 and the Datestyle config is the following
DateStyle
-----------
ISO, MDY
Im having this error
ERROR: date/time field value out of range: "1535673858" Hint: Perhaps
you ...
4
votes
1answer
395 views
Why does PostgreSQL interpret numeric UTC offset as POSIX and not ISO-8601?
Setting time zone as numeric offset (without abbrev, thus IMO not in POSIX format) is still interpreted by PostgreSQL as POSIX format:
SET TIME ZONE '+02:00';
At least I assume, because checking the ...
3
votes
1answer
32 views
Why does postgresql differentiate between named and numeric time zone notations? [duplicate]
Why is there a difference between named timezone and numeric timezone offset, both of which yield different UTC timestamps for TIMESTAMPTZ?
Assume Europe/Prague timezone, which is currently +02:00 (...
0
votes
1answer
249 views
Calculate Total Working Minutes in MySql
I have a design a table for attendance and here are the genral fileds
AttendanceMachineLoginId
EmpId
AttendanceDateTime
Whenever user will come to office, he has to make his attendance.
The first ...
1
vote
2answers
114 views
What is the best smallest data type size for 19 digit number?
I'm using this code to get a mix of Date and Time to use it like a unique ID
DateTime.Now.ToString("yyyyMMddHHmmssfffff")
In SQL Server 2017 I'm confused as to which best smallest size of data type ...
0
votes
1answer
2k views
Converting unix timestamp to an sql timestamp in postgres
I have passed Date.now() and other plain unix timestamps like 1534360109480 into sql and ran them through this.
"@converted_date" = to_timestamp("@date") AT TIME ZONE 'UTC';
And it consistently ...
0
votes
0answers
38 views
Duration of consecutive timestamps by group in sql
I am new to psql window functions and would like to perform a query on test_table in order to find out every instance of inactive outages per mobile_id, country, and brand and most importantly the ...
-1
votes
1answer
720 views
MySQL - Change Default TimeZone changed all values in TIMESTAMP column
I have a few columns with the data type TIMESTAMP. Initially the timezone was default. So I have added the values like this.
mysql> create table test (t1 timestamp, t2 datetime);
Query OK, 0 rows ...
8
votes
3answers
4k views
Can CURRENT_TIMESTAMP be used as a PRIMARY KEY?
Can CURRENT_TIMESTAMP be used as a PRIMARY KEY?
Is there a possibility that two or more different INSERTs, get the same CURRENT_TIMESTAMP?
3
votes
1answer
509 views
Is there a strategy to use timestamp as primary key?
The majority of times we use integer sequences for primary keys to maintain uniqueness of row in a table. Couldn't we use timestamps instead of integers for this purpose? Is there any flaw in that ...
0
votes
2answers
200 views
Postgres - using aggregate functions to return a different column?
I currently have a table containing raw temperature data that looks like this:
I have written a query to find the min, max and avg of this data grouped by the date of the timestamp:
drop table ...
0
votes
2answers
109 views
Mysql 5.6 general log file output not showing unix timestamp
Mysql 5.6 general log file output not showing unix timestamp, so i wonder if there an option that i can execute to enable unix timestamp while logging general queries ?
UPDATE : Here is example for ...
1
vote
1answer
505 views
timestamp with timezone issue with TZR vs TZH:TZM
I have a Hibernate with Oracle JDBC based application inserting/updating into the following column;
COLUMN_A TIMESTAMP WITH TIME ZONE DEFAULT systimestamp NOT NULL
but while it automatically appends ...
0
votes
1answer
231 views
Timestamp and substring with regular expression
I am using postgresql and I have the following table
Table "public.test"
Column | Type | Modifiers
--------+--------------------------+-----------
name | text ...
4
votes
2answers
67 views
Get total amount of time between records when changed state
I have a table, showing the status (healthy, broken) for each device at a given timestamp. I need to get the total amount of time of a whole breakdown.
So the data is stored like this:
device_owner ...
1
vote
2answers
1k views
How are SQLServer Timestamp/RowVersion Values Created?
I am relatively fresh to SQLServer's use of ROWVERSION/TIMESTAMP data, and normally just query for required rows based on modified dates.
How is the ROWVERSION assigned to a new row in a database? ...
3
votes
2answers
119 views
Joining tables based on time and distance: PostGIS with PostgreSQL?
I have a table with several thousand rows that contains time and position data. Rows with the same group_id have the same timestamp. Lets call this table "Small":
Small Table:
id event_time ...
2
votes
2answers
103 views
AT TIME ZONE direction changes based on column having a timezone [duplicate]
Why does Postgres do the opposite thing for TS with and without Timezones? In one case it adds hours, in the other case it subtracts. Just to confuse things more, when specifying GMT+x, the hours ...
1
vote
2answers
121 views
Docker for Oracle Timestamp out of sync
I have created an Oracle Database Docker Image with the help of this link
SYSTIMESTAMP shows UTC time and not my local machine's time.
kaushik:~ knayak$ date
Fri Jun 8 17:46:35 IST 2018
select ...
3
votes
2answers
116 views
Is there a way to avoid having chained/nested “replace()” items when using an ISO 8601 timezone offset value in a generated column?
I am using MySQL 5.7 and have a table that has the following columns that are being used to store some data that is source from an Apache common log formatted access log; details extracted from a ...
0
votes
1answer
289 views
Batch update timestamp records to correct timezone
I'm looking to batch update some timestamp records in postgresql.
My app was storing timestamps to the timestamp column (without timezone) in the the wrong timezone (BST). I only noticed a while ...
3
votes
3answers
693 views
Is timestamptz preferred when timezone logic is performed by the client?
I'm in the process of migrating a web application from SqlServer to PostgreSQL and I'm trying to figure out which type to replace datetime2 with.
The general advice seems to be always use timestamptz,...
0
votes
3answers
4k views
Compare timestamp type columns in SQL Server
I am trying to get data since last timestamp. In my legacy database, all tables have a column named as recordStamp type timestamp. I want to rely on this to select records modified after the max(...
2
votes
1answer
1k views
Update value in timestamptz column
I have a table column with the data type timestamptz. Time zone of server is America/Denver. Going through some strange issue while inserting a value in that column.
When I update the column to the ...
1
vote
1answer
396 views
Formatting Timestamp in Default Constraint
Can you format a TIMESTAMP WITH TIME ZONE column in a CREATE TABLE default constraint in Postgres v10.x?
Example Code:
create_date TIMESTAMP WITH TIME ZONE
DEFAULT to_char(current_timestamp, 'DD-...
3
votes
1answer
63 views
Return values at more/less specific time points
In PostgreSQL 10.0, I have a big table with two columns:
CREATE TABLE xs (
ts timestamp with time zone NOT NULL,
x integer NOT NULL
)
Now, if I have 100 given time points, how do I return ...
1
vote
1answer
4k views
DB2 - Inserting a timestamp operation result in a timestamp field [closed]
I got a some javascript Dojo code assembling a query from JSON variables and I have been trying to insert a timestamp in it.
This is my test table (schema.mdummy):
k and v are varchars
n is an ...
