So i'm working on a laravel project where i pass some data to matlab and then matlab will edit them..everything works fine except the function of matlab that i wrote..
function show(a)
econ=database('datamining','root','');
curs=exec(con,'SELECT name FROM dataset_choices WHERE id = a');
curs = fetch(curs);
curs.Data
end
i want this function to display the name of the dataset the user choose..the problem is that it doesnt work writing just where id = a... but if i write for example where id=1 it works..
i tried to display just the a with disp(a) to see what is the value of the a and it is store the right id that user had choose..so how can i use it in my query??
Try:
a = num2str(a); % or make sure the user inputs a string instead
curs=exec(con,['SELECT name FROM dataset_choices WHERE id = ',a]);
If a = '1', then the brackets would print:
'SELECT name FROM dataset_choices WHERE id = 1'
Related
How to Set variabel call in toad for orcale?
Like i have Query for input 3 report_dat, and 1 want create variable, so that i only input once
I have create like this
def report_date = 2;
def report_year = 2021;
and in where condition, i have set like this.
where H_CLOSING_PERIOD.BULAN = &report_date
and H_CLOSING_PERIOD.TAHUN = &report_year
But, when i run that query, it's still request input from user, like thisenter image description here
Try replacing with the following:
variable report_date H_CLOSING_PERIOD.BULAN%TYPE; --not sure of your data types, you can adjust these
variable report_year H_CLOSING_PERIOD.TAHUN%TYPE;
SELECT 2
, 2021
INTO :report_date
, :report_year
FROM dual;
and then when you use the binds:
WHERE H_CLOSING_PERIOD.BULAN = :report_date
AND H_CLOSING_PERIOD.TAHUN = :report_year
In TOAD, the simplest way (from my point of view), is to use bind variables. How? Simply precede their names with a colon sign:
where H_CLOSING_PERIOD.BULAN = :report_date
and H_CLOSING_PERIOD.TAHUN = :report_year
TOAD will prompt you to enter their values. For any subsequent execution, just hit ENTER (i.e. you don't have to enter their values, unless you want to).
I need to update an XML node that contains a specific number. My query works if I hard code in the number (see figure 1), but I would like to make this dynamic by passing through a variable that contains a string (variableToBeReplaced). I currently wrote this (see figure 2) but it isn't reading the variable correctly so no changes are being made to the xml. Does anyone know how I can include a variable in an updatexml() function?
Figure 1
select updateXML(xmltype(xmlbod),'/LpnList/Lpn/LicensePlateNumber[text() = "12345"]','67890').getClobVal() doc
from myTable
where id = '1'
Figure 2
select updateXML(xmltype(xmlbod), '/LpnList/Lpn/LicensePlateNumber[text()= '|| variableToBeReplaced || ']','67890').getClobVal() doc
from myTable
where id = '1'
I was just missing "" around the variable.
select updateXML(xmltype(xmlbod), '/LpnList/Lpn/LicensePlateNumber[text()= "'|| variableToBeReplaced || '"]','67890').getClobVal() doc
from myTable
where id = '1'
this is my first question on stackOverflow.
I'm working with Corona and I'm having an issue accessing a SQLdb (I'm a bit of a SQL noob.)
I'm trying to access and return a value I've stored in the database.
Here's some code samples:
print("---------------- How I Create New Player Save Data")
local entry = [[CREATE TABLE IF NOT EXISTS playerData (key STRING PRIMARY KEY, content INTEGER);]]
db:exec(entry)
entry = [[INSERT INTO playerData VALUES ("LastLoginTime", 0);]]
db:exec( entry )
entry = [[INSERT INTO playerData VALUES ("Credits", 1000);]]
db:exec( entry )
entry = [[INSERT INTO playerData VALUES ("Level", 1);]]
db:exec( entry )
Now this function works, it will print everything in the db (i pass in 'dbName'):
--print all the table contents
for row in db:nrows("SELECT * FROM "..dbName) do
local text = row.key..": "..row.content
end
This doesn't work, it returns '0':
local grabCredits = "SELECT content FROM playerData WHERE key='Credits'"
local credits = db:exec(grabCredits)
print("-- value: "..credits)
Neither does this, also returns '0':
local grabCredits = "SELECT key FROM playerData WHERE content>=10"
local credits = db:exec(grabCredits)
print("-- value: "..credits)
I don't understand what I'm doing wrong. Maybe I need to use another function call on the db other than exec(). I realize I could iterate through the db every time I want to access a single entry, but that just seems inefficient.
Any help is very much appreciated.
If you want results, you must use some form of iterator. SQLite always returns rows for a query result.
This is similar to what I'm using to retrieve one result from my database and works well for me.
local query = "SELECT content FROM playerData WHERE key = 'Credits' LIMIT 1"
local queryResultTable = {}
local queryFunction = function(userData, numberOfColumns, columnValues, columnTitles)
for i = 1, numberOfColumns do
queryResultTable[columnTitles[i]] = columnValues[i]
end
end
db:exec(query, queryFunction)
for k,v in pairs(queryResultTable) do
print(k,v)
end
In SQL it works fine
SELECT NOID, NO_DOSSOIN, NO_ORDO, POSOLOG FROM dbo.ESPMEDS_ORDO_SORTIR
WHERE NO_DOSSOIN = #NO_DOSSOIN AND NOID IN (#NOIDIN)
example
SELECT NOID, NO_DOSSOIN, NO_ORDO, POSOLOG FROM dbo.ESPMEDS_ORDO_SORTIR
WHERE NO_DOSSOIN = 10 AND NOID IN (16,17)
But as I put this in a dataset.xsd query I don't get the same output, I cannot put more than one id into NOIDIN parameter because the NOID type is integer
so my file DataSet.xsd only work like this:
SELECT NOID, NO_DOSSOIN, NO_ORDO, POSOLOG FROM dbo.ESPMEDS_ORDO_SORTIR
WHERE NO_DOSSOIN = 10 AND NOID IN (16)
the error says I cannot convert data from string to int
You should just separate the NOIDIN. Don't expect to be able to pass an Int32 that looks like 16,17 it will always be seen as a string by this wizard and won't compile at all if you execute it from the code.
The easiest option for you is to pass the range in two values like this :
SELECT NOID, NO_DOSSOIN, NO_ORDO, POSOLOG FROM dbo.ESPMEDS_ORDO_SORTIR
WHERE NO_DOSSOIN = #NO_DOSSOIN AND NOID IN (#NOIDSTART, #NOIDEND)
And then assign :
#NOIDSTART = 16
#NOIDEND = 17
If you're parameters are dynamic you should read this article which pretty much covers the subject.
I wanted to know how we could store the result of my select query on a variable.
#ppt2 = Ppt.select('slide_name').where('id=?',4)
#ppt1 = Ppt.update_all({:time2=>#ppt2},['id like ?','1'])
Here, slide_name and time2 are both text attributes of the same table ppt.
What happens on the above execution is that the time2 field in id=1 gets the value "#ppt2" whereas I want it to get the value of slide_name from id=4 which does not get stored in #ppt1.
In other words, how do I store the value of the select query in #ppt2 so that it can be used in the next line?
Any help is appreciated.
Call the slide_name method on your first result.
#ppt2 = Ppt.select('slide_name').find(4).slide_name