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1answer
21 views

MySQL 5.6 Datetime Range

According to MySQL 5.6 doc, the supported range for datetime data type is '1000-01-01 00:00:00' to '9999-12-31 23:59:59'. But when I tried inserting values that are earlier than '1000-01-01 00:00:00', ...
4
votes
4answers
94 views

Conversion of a varchar data type to a datetime data type resulted in an out-of-range value

I am trying to run a simple query to get all rows created in November: SELECT COUNT(*) FROM dbo.profile WHERE [Created] BETWEEN '2014-11-01 00:00:00.000' AND '2014-11-30 23:59:59.997'; SMSS ...
1
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0answers
17 views

MySQL calculate overlapping period excluding overlapping rules

I would like to calculate the period overlap in hours based on special rules. I created a test setup, that works as long as the rules themselves don't overlap. Example non overlapping rules: id ...
1
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2answers
43 views

Converting string to date with timezone adjustment

I am attempting to convert stirngs to dates in mysql Thu Oct 23 16:46:47 2014 +02:00 Im unsure how to handle the +02:00, The rest is simple enough update logs set date = str_to_date(date_raw, ...
0
votes
1answer
46 views

DateTime returning with AM/PM

I have a SQL Server database (2008R2) running on a Windows 2003 box. I'm connecting to it using another Win2003 box. When I select a datetime value from the database, I'm getting it back in this ...
0
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1answer
33 views

MySQL optimize range duplicate query

I need to eliminate duplicates from a time sheet. I found this solution and have adapted it for my own needs: DROP TABLE IF EXISTS `activity`; CREATE TABLE IF NOT EXISTS `activity` ( `id` int(11) ...
0
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2answers
139 views

Grouping data by MONTH on DATETIME column in SQL Server

I have a table Employee which has the columns Id, Date of joining and Name Date of joining is a DATETIME column. I want to know how many users have joined in the month of October?
2
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1answer
43 views

Breaking down by minutes in between two dates

In MySQL, I've got a data model with a "visit" table that has start and end datetimes. How can I get a breakdown of the number of visits that are active per minute? e.g. | visit_id | start | end ...
0
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3answers
47 views

How do I unit test queries which are based on dates from now?

I've had a hard time making unit test for most of my queries because they are tied very closely to current dates and data which is added to the database could modify the result of the unit test. For ...
0
votes
1answer
52 views

Select Statement to generate result, for Group by per second and link with Table

i tried to search in existing queries but didnt find any related thread. i would like to run a query in user table (for example), and like to get output result on per second bases. and give me zero ...
1
vote
3answers
41 views

Get seconds of day in Postgres

In Java we use Joda-Time to get the seconds of a day as an int value (despite the date): date: 10-10-2014 00:00:30 -> second 30 of day date: 11-10-2014 00:01:30 -> second 90 of day date: ...
1
vote
1answer
76 views

First date in a week, not exceed from the month, start from specific day

I want to get first date of week from date, but not exceed from first date of month. This is the query i've tried : SET @date:='2014-10-03'; SELECT IF(DATE_ADD(@date, INTERVAL(1-DAYOFWEEK(@date)) ...
1
vote
1answer
48 views

Format timezone to +-#### instead of +-##

I am curious if there is a way to configure Postgres (9.1+) to format the TZ part of a "timestamp with time zone" as +-####, just like PHP's date.format method does using "O". PHP Docs: O | ...
2
votes
1answer
154 views

How to find number of days since beginning of fiscal month?

This relates to my question How to find XXth day of previous month in SQL server? The fiscal month starts on 26th of each month. I need to find out from any date: The date of the start of the ...
3
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1answer
260 views

How to find XXth day of previous month in SQL server?

I have 2 parameters, an input date (DATETIME) input day of month (TINYINT) If I enter 11 MAR 2014 as the DATETIME and 26 as the input day of month, I would like to select 26 FEB 2014 as the ...
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2answers
1k views

MySQL performance problem using indexed datetime column

I tried to solve the following problem for about one hour now and still didn't get any further with it. Okay, I have a table (MyISAM): ...
0
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1answer
97 views

Case always returns null?

I have a subquery that gets the DATEDIFF of two dates. However the first case always returns null yet the actual sub query returns dates?! CASE WHEN [date1] > [date2] THEN ...
1
vote
1answer
185 views

How does Sybase store datatime information?

We have a Sybase database that currently stores datetime values in some of the tables. If we move that server with the Sybase database to another country which is in another time zone, will the ...
1
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0answers
208 views

Why does this MySQL date_sub statement return wrong values?

I had a complex statement that was returning strange values and I traced it to the following line: SELECT id, updated FROM status WHERE updated > date_sub(NOW(), INTERVAL 6 MINUTE) ORDER BY ...
2
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1answer
82 views

Optimal table design for a medical center rental service and recurrent shifts

I'm trying to figure out the optimal design for the following situation I'm being presented. I'm developing a medical web application with MySQL as db engine. A medical center has 14-16 offices/rooms ...
6
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4answers
202 views

Store millions of rows of denomalized data or some SQL magic?

My DBA experience doesn't go much further than simple storage + retrieval of CMS style data - so this may be a silly question, I don't know! I have a problem whereby I need to lookup or calculate ...
0
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0answers
59 views

Cohort analisis for gamers activity

I want to do some cohort analysis of gamer activity in my games. By cohort I mean some set of users who registered (or had first activity) on some particular date. For example: users registered on 16 ...
0
votes
1answer
266 views

Whether to use or not to use: DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP

In one Database table, created_at & updated_at are defined as: `created_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP `updated_at` timestamp NOT NULL DEFAULT ...
2
votes
2answers
185 views

Datetime column vs Date + Time columns

I am designing a table for a system that saves a number of logs. We are looking at ~200 entries per second. We are using SQL-Server 2012 Enterprise Edition. I have a question regarding breaking up a ...
0
votes
1answer
231 views

selecting records that are 3 days from expiring datetime

I have a table that contains a datetime timestamp. What I am looking for is to select records that are exactly 3 days from the 30 day expiration based on the datetime timestamp. Here is what I have ...
1
vote
1answer
6k views

Understanding datetime formats in SQL Server

I've dealt with MS SQL Server datetime types for a long time but never thought why the following is happening: I query a table that contains a smalldatetime column. This smalldatetime is always ...
2
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2answers
275 views

Select different time

I looked on the internet and I found your post on the stackexchange. I will try to explain in more detail what we really need I do not know well to write English It is a system for airporttaxi id ...
1
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1answer
83 views

merge rows based on column

I have attendance_log table : +----------+-------------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | ...
0
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2answers
58 views

Query to test and return timed lockout in MySQL

I have some functionality in my webapp that locks out users from certain behavior for a set amount of time (e.g., they have to wait 10 minutes before they can update a level). My query looks like ...
0
votes
1answer
86 views

Subtracting dates give me error in Postgresql

I use age to get the interval between to date fields. Their type is timestamp. My code is as below: select age(timestamp MySecondDateField, timestamp MyFirstDateField) The data in my field ...
1
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3answers
414 views

What happens when we take a timediff between timestamp and datetime

Say I have following table in mysql (5.5+): CREATE TABLE IF NOT EXISTS `test` ( `id` int(11) NOT NULL, `x_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, ...
0
votes
1answer
56 views

How can I efficiently search for all records from a given month, or a given year?

We have a couple queries that involve datetime fields. In particular, we are checking for things like SELECT field1, field2, ..., field20 FROM table WHERE MONTH(startDate) == 1 SELECT field1, field2, ...
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4answers
4k views

Select COUNT of days between two dates except weekends

I am trying to get the number of days between two different dates, except the weekends. I don't know how to achieve this result.
2
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1answer
328 views

MySQL: What is the most optimized way to use datetime type field in query

I am working on optimization of some slow queries in my application. I found a query in which datetime comparison has been used. Below is the subquery: select * from jos_content c where c.visible = 1 ...
2
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1answer
85 views

DATETIME2FROMPARTS alternatives for SQL Server 2008

I am trying to part a datetime value and build it together removing minutes, seconds and so on. I want the values to be hourly. Usually this works on a SQL Server 2012 machine: DATETIME2FROMPARTS( ...
0
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1answer
522 views

Date of birth saving to MYSQL DB with timestamp or date column type [closed]

i am using MYSQL database and would like to know which of this is a good practice. way 1 - use column type in DB as timestamp. i.e will contain values like 2012-11-13 00:00:00 way 2 - use column as ...
0
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1answer
2k views

SQL Query with multiple conditions on date

I want to write a query with condition on dates for below table and sometimes it requires great thinking. StartDtm StopDtm 2013-11-03 00:00:00.000 NULL ...
0
votes
1answer
168 views

How to create a trigger that update the date and time field and modify of the row

I want to create trigger that will update the record. The situation is like: I have one column named CheckInDateTime and one more named Status. If the administrator is not able to update the Status ...
5
votes
1answer
1k views

Why does SQL Server 2008 R2 insert an invalid datetime when using bulk insert?

I want to insert rows with an optional datetime value (per row) using T-SQL BULK INSERT on a SQL Server 2008 R2. A table could look like this: CREATE TABLE [dbo].[tbl_bulk_insert_datetime_issue] ( ...
1
vote
2answers
335 views

SQL Server and SharePoint time problem

I have created a SharePoint application which has a specific time zone. The Windows server where SQL Server and SharePoint are installed are using same time zone. When I create a new item in list ...
0
votes
1answer
206 views

How can I speed up a DateTime comparison query in MySQL?

I am performing the following query on a MySQL table with around a million records ( ~350MB ). It takes roughly 1.5 seconds every time. If I remove the OR last_updated > last_geocoded comparison, ...
8
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2answers
765 views

Handling time zones in data mart/warehouse

We are starting to design the building blocks of a data mart/warehouse and we need to be able to support all time zones (our clients are from all over the world). From reading discussions online (and ...
1
vote
1answer
869 views

MySQL cluster 5.6 doesn't convert invalid TIMESTAMP value to '0000-00-00 00:00:00'?

According to the document: Invalid DATE, DATETIME, or TIMESTAMP values are converted to the “zero” value of the appropriate type ('0000-00-00' or '0000-00-00 00:00:00'). but it doesn't ...
3
votes
1answer
1k views

partitioning by datetime vs date vs int performance

I am trying to determine which partitioning strategy will be most efficient for my queries on SQL Server. We know we want daily partitions. The data has a natural DATETIME field in it, so my gut ...
2
votes
1answer
3k views

MySQL query to evaluate ranges in date and time elements of a datetime column separately

TABLE EventID, EventTime (DATETIME) 1 2013-09-29 23:55:00.0 2 2013-10-01 00:05:00.0 3 2013-09-29 23:55:00.0 4 2013-09-29 23:45:00.0 5 2013-10-02 23:05:00.0 6 ...
1
vote
1answer
101 views

Constructing datetime from 2 fields: one integer and a datetime

I am looking for the most efficient way to parse 2 values; the first is stored as a datetime field with (hh:mm:ss.fff all being 0) and the second time field stored as an int with the format: ...
3
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1answer
13k views

MySQL 5.6 DateTime Incorrect datetime value: '2013-08-25T17:00:00+00:00' with Error Code 1292

I'm using MySQL 5.6 and I have a program that runs the following SQL statement: UPDATE m_table SET s_time = '2013-08-25T17:00:00+00:00' WHERE id = '123' against my database. Unforutnately, I get the ...
1
vote
1answer
461 views

Advice needed for Querying DateTimeOffset data by end users

We are building an Operational Data Store (ODS). The data is coming from our production databases which are located in the United States and Asia. The data in our production databases store date/time ...
0
votes
1answer
650 views

Extract time portion of Datetime2(7) in hhmmssfff format

I need to extract the time portion of a datetime2(7) column in hhmmssfff format and I am doing it like this: DECLARE @mdate AS DATETIME2(7) SET @mdate = '2012-03-15 10:13:27.5437431' SELECT ...
2
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1answer
350 views

Grouping over multiple data dimensions (pivot)

I am logging an Events table, and want an output (as seen at the bottom of this answer), the issue is that I am getting the data in rows, but want them to be displayed column-wise. The two dimensions ...