I need to build an image url from records with different formats
It works using the following code, except I need to get only one image (the 1st one if possible)
Where/How can I use distinct or limit 1?
case
when left(pm.value,7) = "http://" then pm.value
when left(pm.value,8) = "https://" then replace(pm.value,"https","http")
else concat("http://www.example.com/uploads/",pm.value)
end as "image",
from ppbv79_tbl1 pa, ppbv79_tbl3 pm
WHERE and pa.id = pm.listing_id
Related
I have used the List.Accumulate() to merge mutliple tables. This is the output I've got in this simple example:
Now, I need a solution to expand all these with a formula, because in real - world I need to merge multiple tables that keep increasing in number (think Eurostat tables, for instance), and modifying the code manually wastes much time in these situations.
I have been trying to solve it, but it seems to me that the complexity of syntax easily becomes the major limitation here. For instance, If I make a new step where I nest in another List.Accumulate() the Table.ExpandTableColumns(), I need to pass inside a column name of an inner table, as a text. Fine, but to drill it down actually, I first need to pass a current column name in [] in each iteration - for instance, Column 1 - and it triggers an error if I store column names to a list because these are between "". I also experimented with TransformColumns() but didn't work either.
Does anyone know how to solve this problem whatever the approach?
See https://blog.crossjoin.co.uk/2014/05/21/expanding-all-columns-in-a-table-in-power-query/
which boils down to this function
let Source = (TableToExpand as table, optional ColumnNumber as number) =>
//https://blog.crossjoin.co.uk/2014/05/21/expanding-all-columns-in-a-table-in-power-query/
let ActualColumnNumber = if (ColumnNumber=null) then 0 else ColumnNumber,
ColumnName = Table.ColumnNames(TableToExpand){ActualColumnNumber},
ColumnContents = Table.Column(TableToExpand, ColumnName),
ColumnsToExpand = List.Distinct(List.Combine(List.Transform(ColumnContents, each if _ is table then Table.ColumnNames(_) else {}))),
NewColumnNames = List.Transform(ColumnsToExpand, each ColumnName & "." & _),
CanExpandCurrentColumn = List.Count(ColumnsToExpand)>0,
ExpandedTable = if CanExpandCurrentColumn then Table.ExpandTableColumn(TableToExpand, ColumnName, ColumnsToExpand, NewColumnNames) else TableToExpand,
NextColumnNumber = if CanExpandCurrentColumn then ActualColumnNumber else ActualColumnNumber+1,
OutputTable = if NextColumnNumber>(Table.ColumnCount(ExpandedTable)-1) then ExpandedTable else ExpandAll(ExpandedTable, NextColumnNumber)
in OutputTable
in Source
alternatively, unpivot all the table columns to get one column, then expand that value column
ColumnsToExpand = List.Distinct(List.Combine(List.Transform(Table.Column(#"PriorStepNameHere", "ValueColumnNameHere"), each if _ is table then Table.ColumnNames(_) else {}))),
#"Expanded ColumnNameHere" = Table.ExpandTableColumn(#"PriorStepNameHere", "ValueColumnNameHere",ColumnsToExpand ,ColumnsToExpand ),
I have one major select list in a program
EXECUTE 'SELECT PRODUCTS WITH DEL.DATE <= "':EOM.DATE;'"' CAPTURING OUTPUT
I then want to covert the select list to an array, is there a Universe basic function to do this or do I need to write a function?
Use READLIST to read the contents of your active select list into a field delimited (#FM) dynamic array. This is a paradigm I employ when working with multiple select lists and the payloads aren't too large. You can also select into a different list other than the default of 0 but that gets a bit messy intellectually.
EXECUTE 'SELECT PRODUCTS WITH DEL.DATE <= "':EOM.DATE;'"' CAPTURING OUTPUT
READLIST PRODUCTS.LIST ELSE PRODUCTS.LIST = ''
PRODUCTS.COUNT = DCOUNT(PRODUCTS.LIST,#FM)
FOR X=1 TO PRODUCTS.COUNT
ID.PRODUCTS = PRODUCTS.LIST<X>
;* Your per ID magic goes here
NEXT X
Good luck!
I have a question on how I can extract data from Moodle based on a parameter thats "greater than" or "less than" a given value.
For instance, I'd like to do something like:
**$record = $DB->get_record_sql('SELECT * FROM {question_attempts} WHERE questionid > ?', array(1));**
How can I achieve this, cause each time that I try this, I get a single record in return, instead of all the rows that meet this certain criteria.
Also, how can I get a query like this to work perfectly?
**$sql = ('SELECT * FROM {question_attempts} qa join {question_attempt_steps} qas on qas.questionattemptid = qa.id');**
In the end, I want to get all the quiz question marks for each user on the system, in each quiz.
Use $DB->get_records_sql() instead of $DB->get_record_sql, if you want more than one record to be returned.
Thanks Davo for the response back then (2016, wow!). I did manage to learn this over time.
Well, here is an example of a proper query for getting results from Moodle DB, using the > or < operators:
$quizid = 100; // just an example param here
$cutoffmark = 40 // anyone above 40% gets a Moodle badge!!
$sql = "SELECT q.name, qg.userid, qg.grade FROM {quiz} q JOIN {quiz_grades} qg ON qg.quiz = q.id WHERE q.id = ? AND qg.grade > ?";
$records = $DB->get_records_sql($sql, [$quizid, $cutoffmark]);
The query will return a record of quiz results with all student IDs and grades, who have a grade of over 40.
I have a table of Verticals which have names, except one of them is called 'Other'. My task is to return a list of all Verticals, sorted in alpha order, except with 'Other' at the end. I have done it with two queries, like this:
String sqlMost = "SELECT * from core.verticals WHERE name != 'Other' order by name";
String sqlOther = "SELECT * from core.verticals WHERE name = 'Other'";
and then appended the second result in my code. Is there a way to do this in a single query, without modifying the table? I tried using UNION
(select * from core.verticals where name != 'Other' order by name)
UNION (select * from core.verticals where name = 'Other');
but the result was not ordered at all. I don't think the second query is going to hurt my execution time all that much, but I'm kind of curious if nothing else.
UNION ALL is the usual way to request a simple concatenation; without ALL an implicit DISTINCT is applied to the combined results, which often causes a sort. However, UNION ALL isn't required to preserve the order of the individual sub-results as a simple concatenation would; you'd need to ORDER the overall UNION ALL expression to lock down the order.
Another option would be to compute an integer order-override column like CASE WHEN name = 'Other' THEN 2 ELSE 1 END, and ORDER BY that column followed by name, avoiding the UNION entirely.
I have built a multistep form using CCK, however I have a couple of issues outstanding but, not sure if CCK can help.
In one step of the form I have 2 select boxes, the first is auto populated from the vocabulary table with the following code and all woks well.
$category_options = array();
$cat_res = db_query('select vid, name from vocabulary WHERE vid > 1 ORDER BY name ASC');
while ($cat_options = db_fetch_object($cat_res)) {
$category_options[$cat_options->vid] = $cat_options->name;
}
return $category_options;
What I would like to do is, when a user selects one item from the vocablulary list it auto populates another select box with terms from the term_data table. I have 2 issues;
1) I have added the following code to the second select list, just to make sure it works (IT DOESN'T). There a multiple terms associated with each vocabulary, but the second sql statemant only returns one result when it should return several, (SO SOMETHING WRONG HERE). For example in the term_date table there are 6 terms with the vid of 3, but I only get one added to select list.
$term_options = array();
$term_res = db_query('select vid, name from term_data WHERE vid = 3 ORDER BY name ASC'); while ($options = db_fetch_object($term_res)) {
$term_options[$options->vid] = $options->name;
}
return $term_options;
2) Can I add an onChange to the first select list to call a function to auto populate second list using CCK, or do I have to lean towards doing my entire form using the FORM API.
Any help or thoughts would be very much appreciated.
It seems to be a mistake in the query that gets terms. I tried to correct:
$term_res = db_query('select tid, name from term_data WHERE vid = 3 ORDER BY name ASC');
while ($options = db_fetch_object($term_res)) {
$term_options[$options->tid] = $options->name;
}
In your code you selected vid that is actually equal for all terms. Then you added terms names to $term_options array under the same key => so you got only 1 element.
Considering the second question: I would send the whole data structure (all vocabularies and their terms) as json to the client (insert a js script to the page from your drupal code) and implement the desired functionality with jquery.