Thanks for reading my question.
my mysql database is for my record shop.
I have a table called records with 700 records in it
My fields are artist, title, release_date etc.
The release_date is varchar and entered and stored as mm/yyyy
i.e. 01/2003 = jan 2003
i.e. zz/1997 = during 1997 - some records dont have a month
I want to be able to sort then display the records in order of year, then month in my results. i.e. so I can show the visitor a list of the top 10 most recent records. If a record starts with zz, then it would be last in order of the list for that year.
an example sort results would be thus:
11/2001
06/2001
zz/2001
09/2000
01/2000
zz/2000
Any help appreciated!
Many thanks
Matt.
In MySQL, you can do:
order by right(release_date, 4) desc,
left(release_date, 2) + 0 desc;
A note on the second key. This converts the month to a number. The value zz will be converted to 0 because there are no leading digits.
Related
I got stuck with my query. I need to show monthly (current + previous) records.
Let's take below example for the year 2014:-
I have 7 records in the month 03(March)
I have 2 records in the month 04(April)
So total records in the year 2014 is 9.
Now we come to the year 2015:-
I need to show all records in Jan(No new records added in the database), This should be 9.
My Query shows 0.
I need to show all records in Feb(5 new records added in the database), This should be 14.
My query shows 5.
Query works fine when I am checking for month 03 and year 2014, showing all 7 records. but not for all conditions.
I am calling the same query for fetching all months(01-12) data one by one.
SELECT count(pkID) as TRecords
FROM students
WHERE (fkCategoryID ='56'
OR fkSecondaryCategoryID ='56'
OR fkOptionalCategoryID ='56')
AND MONTH(`DateAdded`) <='1'
AND YEAR(`DateAdded`) <='2015';
AND MONTH(`DateAdded`) <='1'
Think about this. You won't find a month smaller than 1. Year and month belong together; don't look at them separately.
SELECT COUNT(pkID) as TRecords
FROM students
WHERE (fkCategoryID = 56 OR fkSecondaryCategoryID = 56 OR fkOptionalCategoryID = 56)
AND DATE_FORMAT(DateAdded, '%Y%m') <= '201501';
In you where clause, you are doing <= (less than or equal to). I expect you want just = (equal to) for your year and month. Certainly your year should only be = (equal to).
I want to create a query for fetch all the data from database. But condition is get from before current month and data will convert into 3 days slot wise with count.Like if i have 12 month data and in July 1 to 3 date data will insert into 50 rows and from 3 to 6 date data will insert into 5 rows.How i fetch this things.That is the mail problem. I have wondered but nothing found related my problem. Is this possible.
I assume you have a DATE or a DATETIME column, that marks the day of the insert, say the column created_at. Then you could get the desired result.
SELECT
COUNT(*)
FROM
your_table
WHERE
created_at BETWEEN '2014-07-01' AND '2014-07-31 23:59:59'
GROUP BY
(DAYOFMONTH(created_at) - 1) DIV 3
Explanation:
With the help of the DIV operator you get your 3-day-slots.
Note
If there's a slot without rows, it won't be in the result. To get these too, you could use a LEFT JOIN with the maximum 11 slots.
Demo
If you having timestamps as attribute type then might be this help you
SELECT count(*) as count
FROM table
AND
TIMESTAMPDIFF(DAY,date,2014-08-01)<=3";
The date is the attribute of your column, TIMESTAMPDIFF will find difference between given date if it's under 3 days from 2014-08-01 records will show up. This way by just sending one date into this position you can find 3 slots of date from your table.
I'm looking for an efficient way to collate all blog posts into a menu of the following format:
2012
August(6)
September(4)
October(2)
Month representing the month(obviously), and the value inside the brackets representing the number of posts in that month. Once clicked, a search will then be made for all posts in that month, in that year.
I need it to be dynamic, picking up November automatically when a post is created in that month, and carrying on into December, into 2013 etc etc...
All I have is a UNIX timestamp for each post. I would really like to avoid using seperate functions to gather endless comlex arrays etc.
Any help much appreciated.
From your question, I understand you're trying to come up with a query to group a number of elements by month and year. The following should do the trick:
SELECT
YEAR(dateField) AS YEAR,
MONTH(dateField) AS MONTH,
COUNT(*) AS TOTAL
FROM table
GROUP BY YEAR, MONTH
Obviously, "dateField" being the name of your datetime/timestamp column and "table" being the name of your table.
More information on the GROUP BY clause and aggregate functions (such as the COUNT(*) function used above) here.
I have a table which holds restaurant reservations. It just has an restaurant_id and a date column which specify the actual date (we are talking about whole day reservations).
I want to find out when is the next available weekend for a particular restaurant. A "weekend" is either Saturday or Sunday. If one of them is available, then we have an available weekend.
The query should, of course, consider the current time to calculate the next weekend.
Can anyone help?
Here's the table structure and data for the "dates" table which holds all reservations made so far:
id id_venue date
12 1 2011-04-22
13 1 2011-04-23
14 1 2011-04-24
15 1 2011-04-30
16 1 2011-05-07
17 1 2011-05-08
As you can see, the weekend of 23-24 is full, so the one of 7-8 May. What I need to find is the date of 2001-05-01 which is the first available Saturday OR Sunday after today's date.
I think the others are missing the question... They think your table may already be POPULATED with all weekends and some status as to open or not... My guess is that your table only HAS a record IF it is reserved... thus you need to find records that DO NOT EXIST AT ALL... based on some automated Look for dates...
This is a modification to another post I've done here
Although I didn't change the context of the query, I only put in the columns associated to YOUR table. I understand you are only going against a single venue table and so am I (actually). However, to understand the "JustDates" alias, this INNER PRE-QUERY is creating a dynamically populated table of ALL DATES by doing a Cartesian join against ANY other table.. in this case, your "Venue" table of reservations (I didn't see your actual table name reference explicitly, so you'll have to change that). So, this in essence creates a table of all dates starting from whatever "today" is and goes forward for 30 days (via limit), but could be 40, 50, 300 or as many as you need.. provided the "YourVenueTable" has at least as many records as days you want to test for. (same clarification in post this was derived from). This result set going out 30, 40 or however many days is pre-filtered for ONLY the given day of week of 1-Sunday or 7-Saturday... So it should return a result set of only Apr 23, Apr 24, Apr 30, May 1, May 7, May 8, May 14, May 15, May 21, May 28, etc.
So NOW you have a dynamically created result set of all possible days you are considering moving forward. Now, that gets joined to your actual Venue Reservations table and is filtered to ONLY return those DATES where it is NOT found for the id_venue you are concerned about. In your data example it WOULD find a match on Apr 23 and 24 and NOT return those records. Same with Apr 30... However, it WILL find that the record in the prequalifying list that includes May 1 will NOT find the date match in the venue table and thus include that as you are anticipating... It will then continue to skip May 7 and 8, then return May 14, 15, 21, 28, etc...
select JustDates.OpenDate
from
( select
#r:= date_add( #r, interval 1 day ) OpenDate
from
( select #r := current_date() ) vars,
Venue
LIMIT 30 ) JustDates
where
DAYOFWEEK( JustDates.OpenDate ) IN ( 1, 7 )
AND JustDates.OpenDate NOT IN
( select Venue.date
from Venue
where Venue.id_venue = IDYouAreInterestedIn
and Venue.Date = JustDates.OpenDate )
order by
JustDates.OpenDate
Note, and per the other reservations posting, the query for reservation date availability dates doing a limit of 30 above can be ANY table in the system as long as it has AT LEAST as many days out as you want to look forward for reservations... If you want all availability for an upcoming year, you would want 365 records in the table used for a Cartesian result to get the #r cycling through dynamically created "date" records.
SELECT ...... DAYOFWEEK(`date`) as `num` FROM .... WHERE num = 1 OR num = 7
I don't know how u wanna check "availability"
How about?:
SELECT * FROM table WHERE (DAYOFWEEK(date)=1 OR DAYOFWEEK(date)=7) AND restaurant_id =$RESTAURANTID AND date > CURDATE() ORDER BY date ASC LIMIT 1
Set the number of days from today until the next Saterday (if 0 then today is Saterday)
Assuming that if today is Sunday you only want reservations for the next full weekend.
select #OffsetSaterday:= mod((8-DayOfWeek(CurDate())+7,7);
You have not supplied enough info to know how the reservation database looks, so I'm going to guess here.
Every restaurant has seats:
Table seats
id: integer primary key
rest_id: integer #link to restaurant
desc: varchar(20) # description of the seat.
Table restaurant
id: integer primary key
other fields.....
Table Reservation
id: integer primary key
reservation_date: date
seat_id: integer
The select statement to get all available seats for next weekend is:
select #OffsetSaterday:= mod((8-DayOfWeek(CurDate())+7,7);
select s.*, rst.* from seats s
inner join restaurant rst on (rst.id = seats.rest_id)
left join r on (r.seat_id = s.id
and r.reservation_date between
date_add(curdate(),interval #OffsetSaterday day) and
date_add(curdate(),interval #OffsetSaterday+1 day)
where r.id is null
order by s.rest_id, s.desc;
You might be able to combine the two selects into one, but MySQL does not guarantee the order in which expressions get evaluated, so I would recommend against that.
I have a list of dates in a table in a MySQL database (the dates when a charity bookstall is to be held), which I want to display on a page. On one page I'm displaying the date of the next stall, and on another the dates of the stall in the next month. (Currently I'm using an unordered HTML list and selecting the dates with PHP, but it's a bit messy, and I also want to tie in the dates with the fundraising totals that are stored in the database).
I want to put the dates in a database though so that I can tie in the dates with the fundraising totals for each week. I'm thinking that once I can identify the date with the nearest up-coming date that I can use 'LIMIT 1' to select the next week's date for display, and 'LIMIT 4' say for where I need to display the dates for the next month, but what I can't figure out is how to identify the record with the nearest up-coming date - identifying the current date and then selecting the nearest date...I have a feeling there's probably one of the MySQL date functions that can be persuaded to help out in this, but can't figure out exactly how.
Any ideas on how I can do this?
If I understand correctly, you can just pick up next four dates that are after today.
In MySQL you could use the CURDATE() function for the 'today' bit, then apply an order and limit to your select statement. For example,
SELECT stall_date
FROM stall_dates
WHERE stall_date >= CURDATE() -- >= assumes you want today's to show too
ORDER BY
stall_date
LIMIT 4
Use ORDER BY stall_date DESC to reverse the ordering if needed.
If your column is a DATETIME field, you can identify the next by using SELECT...WHERE event_date > "2009-11-06" and ORDER BY event_date.
SELECT * FROM so_events
WHERE event_date > "2009-11-06 15:36:00"
ORDER BY event_date ASC
LIMIT 4
MySQL will internally do the work for you and select rows where whose timestamp is greater than the one you specify in the WHERE clause.