I have the correct result coming back. I just need to convert 6 abbreviations in that result to their correct names. There are 20k names assigned to 1 of 6 abbreviated names.
I tried aliasing but that seems to only work for table names.
I tried doing a case statement but that didn't work.
You need to provide more details (like some sample input and output), but if you have data like EM100, and you want to make it EMPLOYEE 100, then you could use an expression such as:
CASE WHEN ColumnName like 'EM%' THEN 'EMPLOYEE ' + SUBSTRING (ColumnName,3,100)
WHEN ColumnName like 'RN%' THEN 'REGNURSE' + SUBSTRING (ColumnName,3,100)
else ColumnName END
But providing more details will help provide a more specific answer.
Related
So in short:
I need to find all rows in the column Translation that begin with the letter M (M123 is one of the Prefixes) and then I need to remove the M123 and similar prefixes from all the rows.
For example, row 1 contains the following data:
M123 - This is translated from Spanish to English
And I need to remove the M123 - from the mentioned data. And this I need to do for the Translation column in every row in the table.
It's been a while since I actually did some SQL-Queries. So I tried a WHERE clause to find all the M prefixes but my query returns an empty search. Following is the query I am using atm:
SELECT Translation from Translation_Table where Translation like 'M';
I am a little bit confused right now. So any help is appreciated.
I sense that you might be wanting to do an update here, rather than a select:
UPDATE Translation_Table
SET Translation = REGEXP_REPLACE(Translation, 'M[0-9]+', '')
WHERE Translation ~ '^M[0-9]+';
addition to this answer following query will remove all occurence of M[any length of a number]
UPDATE Translation_Table
SET Translation = REGEXP_REPLACE(Translation, '[M[:digit:]]', '', 'g')
WHERE Translation ~ '.M[0-9]*';
The following lines of Q code all throw an error, because when the statement "local" is parsed, the local variable is not in the correct scope.
{local:1; value "local"}[]
{[local]; value "local"}[1]
{local:1; eval parse "local"}[]
{[local]; eval parse "local"}[1]
Is there a way to reach the local variable from inside the parsed string?
Note: This is a simplification of the actual problem I'm grappling with, which is to write a function that executes a query, accepting a list of columns which it should return. I imagine the finished product looking something like this:
getData:{[requiredColumns, condition]
value "select ",(", " sv string[requiredColumns])," from myTable where someCol=condition"
}
The condition parameter in this query is the one that isn’t recognised and I do realise I could append it’s value rather than reference it inside a string, but the real query uses lots of local variables including tables etc, so it’s not as easy as just pulling all the variables out of the string before calling value on it.
I'm new to KDB and Q, so if anyone has a better way to achieve the same effect I'm happy to be schooled on the proper way to achieve this outcome in Q. Would still be interested to know in the variable access thing is possible though.
In the first example, you are right that local is not within the correct scope, as value is looking for the global variable local.
One way to get around this is to use a namespace, which will define the variable globally, but can only be accessed by calling that namespace. In the modified example below I have defined local in the .ns namespace
{.ns.local:1; value ".ns.local"}[]
For the problem you are facing with selecting, if requiredColumns is a symbol list of columns you can just use the take operator # to select them.
getData:{[requiredColumns] requiredColumns#myTable}
For more advanced queries using variables you may have to use functional select form, explained here. This will allow you to include variables in the where and by clause of the select statement
The same example in functional form would be (no by clause, only select and where):
getData:{[requiredColumns;condition] requiredColumns:(), requiredColumns;
?[myTable;enlist (=;`someCol;condition);0b;requiredColumns!requiredColumns]}
The first line ensures that requiredColumns is a list even if the user enters a single column name
value will look for a variable in the global scope that's why you are getting an error. You can directly use local variables like you are doing that in your function.
Your function is mostly correct, just need a slight correction to append condition(I have mentioned that below). However, a better approach would be to use functional select in this case.
Using functional select:
q) t:([]id:`a`b; val:3 4)
q) gd: {?[`t;enlist (=;`val;y);0b;((),x)!(),x]}
q) gd[`id;3] / for single column
Output:
id
-
1
q) gd[`id`val;3] / for multiple columns
In case your condition column is of type symbol, then enlist your condition value like:
q) gd: {?[`t;enlist (=;`id;y);0b;((),x)!(),x]}
q) gd[`id;enlist `a]
You can use parse to get a functional form of qsql queries:
q) parse " select id,val from t where id=`a"
?
`t
,,(=;`id;,`a)
0b
`id`val!`id`val
Using String concat(your function):
q)getData:{[requiredColumns;condition] value "select ",(", " sv string[requiredColumns])," from t where id=", .Q.s1 condition}
q) getData[enlist `id;`a] / for single column
q) getData[`id`val;`a] / for multi columns
I have a table that contains a column named 'time_source', with five potential values:
'model', 'country_city', 'region', 'update', and 'storage'
I've been attempting to make an update statement that will not update column date_destination if the time_source is 'model' like this:
update t_vessel_list_ballast
set date_destination = date_depart + voyage_time
where time_source not like 'model';
But it isn't working as i'd expect. instead, it's overwriting the date_destination even when 'model' is in the time_source. I tried something like this:
update t_vessel_list_ballast
set date_destination = date_depart + voyage_time
where time_source like 'country_city'
or time_source like 'region';
but i'm still getting the same results.
There is no other place in the model where this could be happening.
Why am i not getting the result i'm expecting? How do i solve this to get what I want?
I think with like, if you want to match rows (or not match rows like you do here), you'll also need %s on the pattern to show where to match any other characters. For example like '%match' will match any string ending with match, and like 'match%' will match strings starting with match. You can also combine them to match a string containing match with like '%match%'.
this should be a simple thing but I've spent hours to no avail. Basically, I need to look up a salesrep # in a SQL database using the user's Window's user id. The format of the user id is
"Norstar\kjones" and I need the "kjones" portion of it.
using the split function, I am able to pull just the 'kjones' part out:
split(User!UserID,"\").GetValue(1)
I've created a parameter called SlsmnNum and created a dataset to be used to look up the salesrep # using the user id (the slsm_num field is a varchar, not an integer):
select slsm_num from Salesman_Msid where slsm_msid = ''' + split(User!UserID,"\").GetValue(1) + '''
However, I get no results. How can I get the select to work?
alternatively, I tried the following:
in parameter SlsmnNum, I set the default to an expression using:
split(User!UserID,"\").GetValue(1) and this returns 'kjones', as expected.
I created a SECOND parameter (which is positioned BELOW the SlsmnNum parameter), SlsmnNum2, that has a default (and an available) value using a query, which is a dataset containing the following select statement:
select slsm_num from Salesman_Msid where slsm_msid = (#SlsmnNum)
When I run the query on the Data tab, when I type in 'kjones' into the parameter box, it returns '1366', the salesrep # I'm expecting.
But, when I Preview the report, all I get in SlsmnNum2 box is Select a Value and nothing is there (it should return '1366').
Any help would be greatly appreciated!
Try your first approach with Query Text as
="select slsm_num from Salesman_Msid where slsm_msid = '" & split(User!UserID,"\").GetValue(1) & "'"
so in my query i have select columnx from tblz
it returns 001.255556.84546
I want to be able to split this via '.' and put it into three columns.
column1 = 001
column2 = 255556
column3 = 84576
is this possible?
For info, in 2008 these dont work, you have to do the following:
=Split(Fields!returnedValue.Value, ".").GetValue(0)
Create three calculated fields with the following expressions:
=(Split(Fields!columnx.Value, ".")).GetValue(0)
=(Split(Fields!columnx.Value, ".")).GetValue(1)
=(Split(Fields!columnx.Value, ".")).GetValue(2)
I'm not sure it works or not, maybe give it a try. You might need to use IIF() statement to check values before getting them.
In SSRS you reference the field name, tell it the delimiter to use. Since you are not assigning to a variable, per se, you then need to tell it which part of the split string to use. In your example
=Split(Fields!returnedValue.Value,".")(0)
=Split(Fields!returnedValue.Value,".")(1)
=Split(Fields!returnedValue.Value,".")(2)
You would replace returnedValue with whatever the actual field name is, and place each one of those into your columns 1 - 3, respectively.
This answer was originally posted in the question instead of being posted as an answer:
=(Split(Fields!columnx.Value,".")).GetValue(0)
=(Split(Fields!columnx.Value,".")).GetValue(1)
=(Split(Fields!columnx.Value,".")).GetValue(2)