I am trying to sort the retrieved data in the result grid in MySQL Workbench.
E.g. with the query
SELECT * FROM deepmining.prediction
WHERE (search_id = 39 OR search_id = 41) AND lead = 10 AND lag = 10 ;
I get in the result grid, when I sort on the column scale and timeshift (sorting using the result grid UI, not modifying the SQL query):
Shouldn't the first two rows be:
instead, just as if I had appended ORDER BY timeshift, scale; to the SQL query?
Or does sort MySQL Workbench sorting on multiple columns, despite what the UI seems to indicate by the presence of an arrow on the columns scale and timeshift?
The sort order depends on the order how you clicked the headers. The first click is used for the primary sort, the second for the sorting within the primary and so on. See the following images:
Sorted by first clicking on last_name then first_name.
Sorted by first clicking on first_name then last_name.
Related
I have a view, A, with 20 columns which forms my primary data. I have a table B which lists some of the columns from A and contains data I want to exclude from A.
For example table B will have 6 columns 2 of which are 'customer' and 'country' and contain the data 'HP' and 'America'. These columns exist in A. But I want to write a query that brings back data from A except where any rows that have a combination HP and America.
There are 6 columns and table B can have any combination of rows. Anywhere between 1 and all 6 rows could be filled in or there could be a row which has 5 columns filled in. Also another row with a different 5 columns filled in and so on.
I want to be prepared for any possible combination of the 6 rows and the query to search A for the combination and exclude any rows with that data from B.
I have tried this
SELECT *
FROM A T1
WHERE not EXISTS
(SELECT * FROM [dbo].[ExcludedItems] T2
WHere ReportNumber=1
AND
(
T1.job=ISNULL(T2.job,T1.job) and T1.CustomerName=ISNULL(T2.CustomerName,T1.CustomerName) and
T1.COUNTRY= ISNULL(T2.COUNTRY,T1.COUNTRY) and T1.CONTINENT=ISNULL(T2.CONTINENT,T1.CONTINENT) AND
T1.continer= ISNULL(T2.ContainerName, T1.continer) and T1.UnscheduledJob= ISNULL(T2.unscheduledJob, T1.UnscheduledJob) and
T1.[Price]= ISNULL(T2.Price, T1.Price) and
T1.[Haulage]= ISNULL(T2.[Haulage], T1.[Haulage]) and
T1.SiteAdress= ISNULL(T2.SiteAddress, T1.SiteAdress) and T1.Delta=ISNULL(T2.Delta, T1.Delta) and
T1.Cost= ISNULL(T2.Cost, T1.Cost)
)
)
The problem is the result set is not correct. I have tried with a smaller column sample and able to exclude the correct combination of Customer and Country but when I introduce a 3rd or 4th column combination I can eyeball the result set and immediately see its incorrect. Not sure if I have to use multiple NOT EXISTS for each possible combination, was hoping not to.
A constraint is A has to be a view not a table. Otherwise I would have used variables in some manner and wrapped the whole thing in a stored procedure.
Appreciate any help, fall back is to manually add to the code each time an item combination is supplied in B!
So, simple question, I have combo box in my database and I want items that I have selected most frequently to appear first the next time that I add a record.
I would suggest adding a Long Integer field to the table consituting the row source for your combobox, and incrementing the value held by such field either on the AfterUpdate event of the combobox, or following the main operation being performed by your form.
Then, sort the items in the combobox by this new field in descending order.
I assume that your combo box selects a lookup value in for a property (PropertyID) that is saved in a table (MainTable).
You can get the number of times this property has been selected with
SELECT PropertyID, COUNT(*) AS SelectedTimes
FROM MainTable
GROUP BY PropertyID
Now get the sorted lookup table by using this query as sub-query:
SELECT L.PropertyID, L.Name
FROM
LookupTable L
( SELECT PropertyID, COUNT(*) AS SelectedTimes
FROM MainTable
GROUP BY PropertyID) X
ON L.PropertyID = X.PropertyID
ORDER BY X.SelectedTimes DESC, L.Name
I'm also sorting by name in case two entries have the same count.
As usage may change over time, you should record the time when an item was selected. Then you can weight the usage, so recent usage of an item have higher weight than those items used, say, a year ago.
Then you can run a query to list the usage having the most recently used items at top:
Select Item, Sum(1 / DateDiff("h", [SelectedTime], Now())) As Usage
From ItemUsage
Group By Item
Order By Sum(1 / DateDiff("h", [SelectedTime], Now())) Desc
Of course, this linear weighting may be too simple. You can apply any math to the usage like square or log.
Running into an issue when running a query in Google Sheets. The results of the array formula query are correct but the column utilized to order the results (Col1) is comprised of both blank/null cells and dates. As such, when ordered by this column the blank/null values are listed first before the dates. Is it possible to have the dates ranked first and push the blank/null cells to the bottom?
Ordering by DESC will not work as I would want the earlier dates listed first. Additionally, the blank/null cells cannot be excluded entirely from the results either (e.g. they correspond to tasks without deadlines but must still be listed).
The formula I am currently using is:
=ARRAYFORMULA((QUERY({DATA RANGE},"SELECT Col1 WHERE Col2 = X OR Col3 = X ORDER BY Col1 LIMIT 10",0))
Seems like there is an easy way to achieve this but I cannot find anything on the topic in other forums. Any help would be greatly appreciated.
Use SORT()
I believe for your example you could make it work like so:
=SORT(ARRAYFORMULA((QUERY({DATA RANGE},"SELECT Col1 WHERE Col2 = X OR Col3 = X",0)), 1, 1) (untested)
If your LIMIT 10 is important, then I think you could wrap the whole thing in another query and re-add the LIMIT.
Illustrated Example:
Range That Needs Querying and Sorting
Formula
Simple version defining a range in which the header is omitted:
=SORT(QUERY(A2:B7, "select *"), 1, 1)
Version that handles headers:
={A1:B1;SORT(QUERY(tabname!A2:B7, "select *"), 1, 1)}
This version creates an array combining the header row and the data rows so it can sort the data rows independently of the header.
Queried and Sorted Results
Breakdown of Formula Components
Array {[range 1]; [range 2]}
SORT() SORT([range], [column to sort on], [sort ascending - true/false or 1/0)
Query() QUERY([range], "[query]")
I just started using MySQL Workbench (6.1). The default limit for queries is 1,000 and that's fine I want to keep that.
But the results from the action output message will therefore always say "1000 rows returned".
Is there a setting to see the number of records that would be returned in the query had their been no limit? For sanity checking query results?
I know this is late by a few years, but I think you're asking for a way to see total row count in the bottom of the results pane, like in SQL Server. In SQL Server, you would also go in the messages pane and it would say how many rows were returned. I was actually looking for exactly what you were asking for as well, and seems like there is no way to find that. If you have an ID in your table that is just numeric and is in numeric order, you could order by ID desc and look at the biggest number there. That is what I've decided to do.
The result is not always "1000 rows returned". If there are less records than that you will get the actual count. If you want to know the total number of rows in a table do a select count(*) from table. Alternatively, you can switch off the automatic limit and have all records returned by MySQL Workbench, but that can be time + memory consuming for large tables.
I think removing the row limit will help. By default, MySQL workbench will limit the result set to 1000 rows but you can always disable the limit. Check out https://superuser.com/questions/240291/how-to-remove-1000-row-limit-in-mysql-workbench-queries on how to do that.
You can run a second query to check that
select count(*) from (your original query) as t;
this will return the total rows in actual result.
You can use the SQL count function. It returns the count of the total number of rows a query returns.
A sample query:
select count(*) from tableName where field1 = value1
In workbench, in the dropdown menu at the top, set it to dont limit Then run the query to extract data from table Then under the output pane below, the total count of the query results will be displayed in the message column
I have a query with 3 parameters that a user should be able to define:
AND (ORION_SCHED.TRIP.DATE_TIME = '09/11/2012')
AND (ORION.CUST.COUNTRY = 'BE')
AND (ORION_SCHED.TRIP.ID_SHIFT ='1')
DATE_TIME should be a datepicker
COUNTRY dropdown with defined values
ID_SHIFT dropdown with defined values
I guess this isn't an issue?
The result of this query will return the dataset
My actual question: I want the result to be presented in this way
So always 3 blocks of data next to each other, the data of every block is the result of the query filtered down on the column TRUCK_ID (a sub-select of the returned dataset)
The empty cells per block are a nice to have, these are non-unique values per TRUCK_ID that I don't wish to be repeated on every line, but like I said a nice to have.
I would add a new column to the query that returned 1,2 or 3 (for each different TRUCK_ID. Then I would use 3 Tablix (one per column on your report) and filter the data by the new column you added on the query.
Then you just group on the TruckID on each tablix and play around with the format. It should work.