Questions tagged [qsqlquery]
The QSqlQuery class, part of the Qt framework, provides a means of executing and manipulating SQL statements.
qsqlquery
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QSqlQuery is not meant to be copied
I have defined a QSqlDatabase as follows:
QSqlDatabase m_db;
And use it repeatedly for each new query as follows:
QSqlQuery query(m_db);
query.prepare(querystring);
success = dbquery(query,...
- 4,506
0
votes
3
answers
53
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Identify first row with a condition
I have a table like this one:
doc_num
doc_lin
doc_type
DOC0001
1000
2
DOC0001
2000
3
DOC0001
3000
3
DOC0001
4000
1
DOC0001
5000
2
DOC0001
6000
3
DOC0001
7000
3
And I need to have a SQL view ...
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1
answer
50
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Is there an equivalent of sqlite3's executemany() in pyside6?
I am trying to read a csv into an sqlite database with Qt SQL (pyside6) but the method I have tried is far too slow.
The sqlite3 module in python has an executemany() function which can insert ~1 ...
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0
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34
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error closing the connection to the SQL database due to a query in Qt6/C++
my code outputs the error
QSqlDatabasePrivate::removeDatabase: connection 'createRequestConnection' is still in use, all queries will cease to work.
although there is not even a QSqlQuery query, I ...
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0
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0
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37
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How to create a schema with tables in a single query with PyQT (using Postgres database)?
I'm building a GUI containing a button that creates a database schema with tables, I read the docs in PyQt about QSqlDatabase and QSqlQuery but it looks like it just runs the first line creating the ...
-1
votes
1
answer
23
views
find device control character using sql query
I have data in table with string "BFCTADMG00MB00O7nX5" and I want a find the control or any special character through sql query
Please help ?
I have tried multiple things to get it but no ...
0
votes
1
answer
163
views
Combine Multiple Rows into One Cell Using SQL
Hello guys, maybe this is a basic SQL question. How can I combine multiple rows into one cell using SQL?
Expected Result:
Thanks in advance!
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1
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112
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How to create a variable dependent column name?
I am struggling to name a column based on a variable.
I want to create a column with a name including the stock symbol, for example Open_AAPL, Open_MSFT, Open_ORCL.
I have tried the following to make ...
0
votes
0
answers
59
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SQL query/view for -> KPI : Total revenue for each genre
Im still quite new to SQL and I cant figure out how to get the total revenue for each specific genre in my database.
Relations between tables
The problem is that I cant just use SUM(prijs) from the ...
- 1
0
votes
3
answers
454
views
KDB/q How to use qsql select statement to find item in list where type is empty list in a column of characters?
I have a table and passed it into a function where I use the primary ID to generate a column of characters.
However, there are a few areas in this newly-created column where instead of characters it's ...
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55
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SQL- Twitter First Five who tweeted
Problem Statement
Write a Sql query to retrieve the usernames of the users who have tweeted on Twitter, ordered by the earliest tweet creation time, and limited to the first five users?
Tables Schema ...
0
votes
0
answers
21
views
Get the ID of inserted rows from QSqlQuery [duplicate]
I am using QSqlQuery to insert multiple entries in one query. I need to get the IDs of all elements that were inserted with my query :
QString queryContent = "INSERT INTO table (field1, field2) ...
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-3
votes
1
answer
78
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Converting Tableau statement to SQL query for calculations
Good mortning,
I tried to conver the statement in Tableau in SQL server, but I received an error.Could you help me how to return 2 values in the CASE statement in SQL based on certain criteria and ...
- 1
0
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2
answers
861
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How to find entire string using typeORM, Nestjs, SQL Server, just like LIKE clause in mysql
I have database called Beta and table called Keys. In that table I have a column licenseKey: string. I want to find the entire licenseKey from the portion of licenseKey.
Just like SQL below query:
...
0
votes
2
answers
85
views
Default row values if returned row is blank
I have a sample query below:
Select column1, column2, column3
from table1
where column1 = 3
and the result is blank
Question: How to update the query that it will return this default result instead ...
- 59