Questions tagged [datetime]

for questions specific to data types that contain both date and time parts.

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14 views

fixing broken convert_tz() in Mysql?

I come across the documentation for convert_tz() in MySQL and it says If the value falls out of the supported range of the TIMESTAMP type when converted from from_tz to UTC, no conversion occurs. ...
2
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1answer
64 views

Date time cast preferred method

What would be the preferred method for speed and less database stress using a between or less than? SELECT LogId FROM [Master].[dbo].log mlog WHERE cast(LogDate as Date) BETWEEN '2019-01-01' AND '...
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1answer
39 views

Select where datetime is greater than other datetime which may not exist

I have a table with a field eventtime of type datetime and a different table with a datetime field. I need the minimum eventtime that is greater than the greatest datetime field from the other table ...
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1answer
25 views

Time interval is returning all records or no records

I am trying to run a query to return records in the last 24 hours and following the instructions here: time interval tutorial After running the query at 18:30 UTC, my query looks as follows: RETURN ...
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1answer
33 views

Disable mysql_tzinfo_to_sql during MariaDB/MySQL installation

MariaDB run in docker container hangs during initial startup while mysql_tzinfo_to_sql running because of the issue. I've disabled mysql_tzinfo_to_sql by setting MYSQL_INITDB_SKIP_TZINFO env. var to ...
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1answer
16 views

I have hard time understanding Postgresql OVERLAP function when provided Interval

On postgresql documentation whilst reading for date and time operations I have hard time understanding the following example: SELECT (DATE '2001-02-16', INTERVAL '100 days') OVERLAPS (DATE '...
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2answers
27 views

Why can't I insert this value using timestamp but can with datetime?

I want to insert this value: 2020-03-29 01:00:00 If I set up a column called date with data type datetime I can insert the value. But if I use the data type timestamp I cannot insert and get an error ...
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1answer
17 views

Does range improve match operation and which runs first, range or match

I am using MySQL version 5.6.10 I have a very very large table large_table and a relatively small table small_table The small_table has only the records of the date 2019-11-20 There is a column I ...
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1answer
34 views

Locating all records relevant for a specific date

I have a MySQL InnoDB table with about 1GB of records and growing. each record in this table has, among other fields two date fields : AddedDateRecord - The date the record was added (datetime). ...
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2answers
45 views

How to add time from a Date value to another without a varchar conversion?

Let's say I have 2 variables in a Stored Procedure, both are Dates Foo contains '13/10/2019 00:00:00' Bar contains '01/10/1914 16:33:11' I want to add Bar's time to Foo's date, so that I get a ...
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1answer
38 views

Dates values displayed 0000-00-00

I have imported a csv file into my database created in phpmyadmin using sql. Server version: 5.6.37 - MySQL Community Server (GPL I have a column for dates which has a datatype of date. The data ...
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1answer
55 views

TIMESTAMP OR DateUpdate

I want to implement incremental ETL on some of my sql server tables, so I need a new column like UpdatedDate to track change dates of my records. I want to transfer only updated and inserted records, ...
2
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1answer
30 views

Add Gameweek Fixeture based on Datefield

having the following table i need to add a new Column called "Round" to represent Round 1, Round 2 and so on, based on the Date Column in the table. Same Round should be given to matches happening in ...
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2answers
47 views

How to interpret timestamps stored as 10-digit negative integers?

I've inherited an undocumented MS Access database where the date/time values are stored in an INT column and the majority of values I've seen so far are 10-digit negative integers. How do you ...
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2answers
30 views

Group results from two different tables on same hours

I have two simple tables: indoor id | timestamp | temp | humi outdoor id | timestamp | temp And two selects which give me time and average temperature grouped by same hour for the last 24 hours: ...
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3answers
107 views

Select youngest record

I have a MariaDB table "mdata" with the following schema: +-----+-----------+---------------------+------+ | id | room | date | temp | +------+-----------+---------------------...
2
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1answer
41 views

How to combine date and time with a string value in column created by Case in SQL Query

I am in the process of creating a query for an SSRS report that will show a column that has DATETIME values. The column can have NULL values. In my query I would like to use a CASE expression. I ...
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1answer
35 views

Best way to put date range in a table in mySQL

I'm designing a system which is basically a booking engine. it uses separate table to store room data and separate table to store it's availability information (available date(s) ). I'm stuck in ...
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5answers
6k views

How to add 1 milliseconds to a datetime string?

Based on a select, I can return x rows like this: 1 2019-07-23 10:14:04.000 1 2019-07-23 10:14:11.000 2 2019-07-23 10:45:32.000 1 2019-07-23 10:45:33.000 We have all milliseconds with 0. Is ...
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0answers
34 views

Redshift/Athena: Most efficient way to cast timestamps of varying precision to date in query?

I'm receiving a stream of log files to an S3 bucket and querying this data through Amazon Athena (Redshift). Contained in the log files are timestamps with the seconds field having decimals to the ...
6
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1answer
547 views

SQL Server error 242 with ANSI datetime

I'm trying to debug a MS SQL Server error 242: The conversion of a char data type to a datetime data type resulted in an out-of-range datetime value. The error is originated by this statement: ...
2
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0answers
44 views

What is the name of month 0?

MySQL permits you to store a zero value of '0000-00-00' as a “dummy date.”: https://dev.mysql.com/doc/refman/8.0/en/date-and-time-types.html I'm currently inserting into this field using STR_TO_DATE(?...
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1answer
55 views

Row for each date, start and end

I have a table that has two columns, startDate and endDate. Each day has its own capacity. Between these dates, user can get from 1 to n items. I am going to get number of items remaining for each day ...
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1answer
23 views

How to summate weekly totals from a postgres date range type per user

I have the following table: Schedules +----+---------+------------+-------+--------------------------+ | id | user_id | project_id | hours | date_range | +----+---------+------------+---...
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0answers
24 views

Time wise user online count

I'm not a DB expert but i'm trying to get time wise user online count to show in a graph. I have manage to get online user count for current time but how to get for a time span ? i need each minute ...
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0answers
22 views

Selecting time_Stamp >= time('now') GROUP BY firstName RETURNS all first names and same time?

I am trying to select two columns from two different tables, where a value exists in both tables and the time in one table is >= now - 30 minutes. How ever it is returning all the firstnames and then ...
2
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2answers
2k views

Incorrect datetime value Mysql

Good morning. Mysql 5.7.25: insert into mytable values('2019-03-31 02:06:29') return error "#1292 Incorrect datetime value" but: insert into mytable values('2019-03-31 03:06:29') return no ...
4
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1answer
534 views

Check if two datetimes are between two others

Today I'm facing with problem, which I can't solve. I need to check if two datetimes (2019-04-08 13:30:00 - 2019-04-08 15:30:00 ) are between or overlap two others (2019-04-08 14:00:00 - 2019-04-08 ...
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1answer
50 views

mysql_query expected [closed]

currently I'm getting the error stated above using thise code: $Tijd = date_create($_POST ["Tijd"]); $Tijd->format(\DateTime::ISO8601); $result = mysql_query ("SELECT Voorstellingsnummer FROM ...
1
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1answer
105 views

How to get all dates belonging to a timestamp range

I have a tsrange as input. For example: tsrange('2019-03-04 20:00'::timestamp, '2019-03-06 20:00'::timestamp) I want to generate all dates belonging to this range. I started with the following, ...
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1answer
426 views

Pass 'interval' value to date_trunc function in PostgreSQL procedure

I am fetching the "age" of two timestamp columns (End and Start) and further choosing it as to_char 'MM' format. So I have the difference of the months from two timestamp columns. The syntax in the ...
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1answer
190 views

Index Optimization for Datetime comparing day of week and hour

I have a table of sensor observations with obs_ts timestamp, sensor_id text, sensor_val int, and to fill in gaps with data we have models by day of week and hour of day: model_id int, hour_of_day int, ...
1
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1answer
63 views

Subtracting Days From Current Date

I know this is probably very basic, but I'm trying to create a calculated field that subtracts X number of from Current Date, based off of the value of another field: CASE WHEN DaysPD = 30 THEN 1 ...
1
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1answer
35 views

calculate days spent of all visitors from encounters

I have an encounters table CREATE TABLE visitors( id serial PRIMARY KEY, start_date TIMESTAMP NOT NULL, -- visitor_id bigint NOT NULL -- skip for now, end_date TIMESTAMP ); (end_date can be ...
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1answer
1k views

CONVERT to datetime fails on Dynamic SQL - “Conversion failed when converting date and/or time from character string” [closed]

I've spent a few hours with this and still can't get it to work. I'm trying to get the path to the most recent file that matches a pattern for a dynamic SQL query where I'm loading a CSV file into a ...
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1answer
62 views

SQL Server 2008 onward - Globalization with Date Time

My application is standalone windows application. Database is SQL Server 2008 onward. The application will be deployed on systems around the globe. User should view the date/time values in their own ...
1
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1answer
126 views

Get closest previous date

I need to get the posts closest to a date. SELECT id , datetime FROM dates WHERE id != 150003 AND datetime > FROM_UNIXTIME(1549622615) ORDER BY datetime LIMIT 1 Returns a correct ...
0
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1answer
55 views

Converting MySQL 5.5 datetime binary to MySQL 5.6 (math problem)

I received a database "backup" of binary files (.frm and .ibd) that were copied from a MySQL 5.5 install. Unfortunately, I was unable to get these files to import into a MySQL 5.5 vm that I created. ...
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2answers
76 views

Get value increment during an hour of a day

I query YouTube Data Api for a list of most popular videos on a channel and then get their statistics, 4 times per hour (each 15 minutes, by cron). The data is stored in Postgres, but dumping it and ...
1
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2answers
1k views

Find the OverLapped (Common) Date Range from Group of Date Ranges

How can I find the Overlapped (common date range) from a group of Date Ranges given? The following table contains events and programmes (EID and PID respectively) CREATE TABLE #EventsTBL ( PID ...
1
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1answer
31 views

redesign database around selecting rows by time range

I currently have a MySQL database that grows about 50,000 rows a day. When querying data out of the database, I query information from the info table and use a subquery on the session table to refine ...
0
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2answers
315 views

How to store date & time in DECIMAL(18,3)?

I am currently working with a database scheme that contains a DECIMAL(18,3) column that is supposed to contain date and time. Sadly, I do not have any example data and need to create it myself. ...
1
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1answer
51 views

Searching through dates query not working?

I'm trying to query the recent week rows by using dates. BUT the query is not returning any result. It takes forever to execute. I checked my DataBase where date is saved in 1446976737 format which ...
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2answers
414 views

Group by range DATIME of 2h up or down - Mysql

Well, I have a table with some columns that some of these are repeated, but the time is not exactly the same, I need to do a group by that has a range of 2 hours. Notice that all the fields marked in ...
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1answer
56 views

How can I get the last second of the last month as a default parameter value?

I am trying to get the last second of the last month as a default value for a parameter. I can get the last day of the last month from this query on social.msdn.microsoft.com last month last day ...
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2answers
32 views

select newest update record among similar record

I have 2 tables segments and summaries. I want to list the shows in a date interval and just show the latest updated segments (in bold) since it is the freshest copy of the segment for that person. ...
0
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1answer
86 views

How to query from the result of a changed column of a table in postgresql

I am working with Presto on Amazon Athena. I have a string time column in a table and now I want to change that time to date time type and then query data for selected dates. Is there a direct way to ...
0
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1answer
244 views

how to ignore DST in MySQL

We have a database with flights, and in there, departureTime DATETIME field. Extra info: global.time_zone: Europe/Dublin session.time_zone: Europe/Dublin MySQL version: 5.7 Problem is, I need to ...
2
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1answer
54 views

T-SQL DATEDIFF_BIG - 469ms diff with currentmills and documented start-end constraints incorrect?

(NB I don't count as a db admin... I'm just using one, so please assume zero other knowledge) My reference date is '02/04/2017 18:00:00.124', and for no particular reason, whilst I need the time ...
0
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1answer
334 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 ...