I have a table that includes dates, I'm trying to check if a date I have falls between the dates in the table. My query is working, but it doesn't return anything. This seems like it should be very simple, but I can't wrap my head around it.
SQL query looks like this:
SELECT id FROM table
WHERE
(this_date) between (beginning_date_from_table) and (end_date_from_table)
The dates are generated dynamically in my script so I can ascertain if what I'm passing into it falls between the beginning and end dates in my table. I don't need any specific data from the table, just a boolean telling me whether the date is between the beginning and end dates or not.
You are looking for EXISTS:
SELECT
EXISTS(
SELECT id FROM table
WHERE
(this_date) between (beginning_date_from_table) and (end_date_from_table)
) AS hasValue
Hope this helps,
Check your MySQL server's date format and your generated date format.
MySQL date format is like that: '2019-01-30 18:19:52'
Also you can try change
(beginning_date_from_table) and (end_date_from_table)
to
(end_date_from_table) and (beginning_date_from_table)
Check: How do I query between two dates using MySQL?
I phrased the question slightly wrong, in that I was trying to return the result of a conditional. Once I realised how to ask google the right thing, I quickly came up with this solution:
SELECT (CASE WHEN this_date BETWEEN beginning_date AND end_date THEN 1 ELSE 0 END) AS date_result
Thanks to the other people who answered, your input put my thinking on the right track.
Related
Here is my query for a maintenance dates list.
SELECT `checkdates`.`checkdateplanneddate`, `checkdates`.`checkdatevehicle`, `checktypes`.`checktype`, `checktypes`.`emailto`, `checktypes`.`daysnotice`
FROM `checkdates`
, `checktypes`
WHERE `checktypes`.`checktype` = `checkdates`.`checkdatechecktype`;
The idea is..
Everyday the server will email customers to let them know which checkdates are coming, based on the days notice that is set for that type of check. (see image)
Currently it is showing all checkdates.
All i need to do is filter the list so it only shows the dates that are
"Todays date plus checktypes.daysnotice"
I have tried many different queries, but cannot seem to get the right combo.
Thank you in advance
I have attached an image to show that the data is available
If I understand your question correctly, and assuming that you are running MySQL (as the use of backticks for quoting and the phpmyadmin screen copy indicate), you can use date arithmetics as follows:
SELECT cd.checkdateplanneddate, cd.checkdatevehicle, ct.checktype, ct.emailto, ct.daysnotice
FROM checkdates cd
INNER JOIN checktypes ct ON ct.checktype = cd.checkdatechecktype
WHERE cd.checkdateplanneddate = current_date + interval ct.daysnotice day
The where condition implements the desired logic.
Side notes:
Use standard, explicit joins! Implicit joins (with commas in the from clause) is a very old syntax, that should not be used in new code
Table aliases make the query easier to write and read
I would like to filter out old records and present only newer ones. The idea is currentDate minus 2 years. One record looks like this (table Symposium):
Attributes:
ID;Day;Month;Year;Firstname;Lastname;Symposium_title;Speakers;
Records
1;26;10;2012;Markus;Meier;Topic MySQL;5;
3;26;10;2011;Markus;Meier;Topic PHP;5;
6;26;01;2010;Markus;Meier;Topic CSS;5;
Wished output
1;26;10;2012;Markus;Meier;Topic MySQL;5;
3;26;10;2011;Markus;Meier;Topic PHP;5;
I could easily do a small php to filter out older data, but I'm sure there is a way to do it direct with mysql in one command.
some query like this (this is just pseudo code)
SELECT * FROM Symposium WHERE (current_data() - 2 Years);
remark: The attributes day;month;year will not be changed. There are more then 50 tables, that are build up by this attributes. So don't recommend change of the table.
Can someone help me ?
You can use STR_TO_DATE function and DATE_ADD for this task:
syntax:
STR_TO_DATE(string, format)
So in your code:
SELECT * from Symposium
WHERE DATE_ADD(STR_TO_DATE(concat(Day,'-',Month,'-',Year),'%d-%m-%Y'), INTERVAL 2 YEAR) > NOW();
(sadly, I don't have a MySQL at hand right now, so I can't test it, but unless there is some very basic typo in it, it should work)
It sounds more complicated than it actually is. Here is what I'm trying to do within the SELECT part:
SELECT TIMESTAMPADD(
UCASE(
SUBSTRING(offset_unit,1,CHAR_LENGTH(offset_unit)-1)
),1,'2003-01-02') as offset_date
offset_unit is a VARCHAR column in the database. It contains one of the following: "Hours","Minutes".
offset is an INT.
I am trying to convert the offset_unit to uppercase, after I have removed the last character ('s') so I can have a proper interval (MINUTE, HOUR...) so I can get a date that I can use in sorting afterwards, but MySQL keeps throwing an error. I have tested each step by adding one function at a time, and it only fails after I add TIMESTAMPADD. If I enter MINUTE manually then it works.
Any way to get this working?
Additional info: I am running this in CakePHP 1.3, in a find, within the 'fields' array, but that shouldn't be important.
this can be easily achived by using CASE WHEN clause as:
SELECT (CASE
WHEN offset_unit = 'HOURS'
THEN TIMESTAMPADD(HOUR,`offset`,'2003-01-02')
WHEN offset_unit = 'MINUTES'
THEN TIMESTAMPADD(MINUTE,`offset`,'2003-01-02')
END) AS offset_date
FROM my_table;
SEE SQLFIDDLE DEMO HERE
It doesn't work because TIMESTAMPADD does not take a string as the first argument, but a unit keyword, for example MINUTE. My guess is that you need to do this in two steps, first get the unit and then construct a query with the correct keyword.
I have a database containing a list of events, it is formatted something like this:
Datef Event Location Discipline
10/01/2012 MG Training Brooklands MG
I am running this query in order to get the results between certain dates:
SELECT * FROM events WHERE Discipline IN ('MG') AND Datef BETWEEN 01/01/2012 AND 31/01/2012
The query runs correctly and I know that there are relevant results in the database, but I receive no results when running the query in phpmyadmin (I just get told "Your SQL query has been executed successfully").
I was wondering if anyone had any idea why this wouldn't be returning results?
Update:
Putting dates in quotes (e.g. SELECT * FROM events WHERE Discipline IN ('MG') AND Datef BETWEEN 01/01/2012 AND 31/01/2012) kinda works but there's a bug.
I've certain dates doesn't work. e.g. SELECT * FROM events WHERE Discipline IN ('COMM') AND Datef BETWEEN '2012-02-01' AND '2012-02-29' shows no results, even though there is an event on 2010-02-01. Is this a peculiarity in the BETWEEN algorithm, or am I still getting my query wrong?
Without quotes or anything designating those values as dates, it will simply do the math on the integers you wrote.
In other words, you ask for
BETWEEN 01/01/2012 AND 31/01/2012
So you get 1/1=1, then 1/2012 which is almost 0.
Then you do 31/1=31, then 31/2012 which is also almost 0.
So it becomes
BETWEEN 0 and 0
Try wrapping your code strtotime(). MySQL and PHP use different formatting.
For some additional info, here are a couple of links:
http://www.richardlord.net/blog/dates-in-php-and-mysql
http://www.binarytides.com/blog/parse-and-format-dates-between-php-and-mysql/
Your column Datef is of the wrong type and should be datatime
SELECT
*
FROM
`events`
WHERE
`Discipline` IN ('MG')
AND
`Datef` BETWEEN '2012-01-01' AND '2012-01-31'
This is my initial question....well I got a response but I'm still stuck.
Can anyone please explain how can I achieve this in mysql:
I have two fields in mysql, 'cap_commdate' with DATE TYPE and 'cap_policyterm' with INT TYPE. I want to have another field called 'cap_maturityDate' which will automatically compute the policy term pereod in years (in Layman's expression ie: cap_commdate*cap_policyterm). What is the right SQL query to use; or what is the best approach; and I want to use it in my recordset to prepare a confirmation page... please a simple explanation...
I have tried the following:
SELECT DATE_ADD(cap_commdate, INTERVAL cap_policyterm YEAR) ...
I ran the query and got errors; so i edited it and used:
SELECT
DATE_ADD("cap_commdate", INTERVAL "cap_policyterm" YEAR) AS cap_maturity FROM capital
All I got was empty fields. Please help out.
Remove the quotes around the field names
SELECT
DATE_ADD(cap_commdate, INTERVAL cap_policyterm YEAR) AS cap_maturity FROM capital
I think this should work.
I know its is an old question, but just trying to help others