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Tag: sqlite
SQLite – Rolling Average/Sum
I have a dataset as shown below, wondering how I can do a rolling average with its current record followed by next two records. Example: lets consider the first record whose total is 3 followed by 4 and 7 ,Now the rolling 3 day average for first record would be 4.6 and so on. Expected output: PS: Having ̶…
Complex SQL query by pattern with timestamps
I have the following info in my SQLite database: I want to perform a query that returns the elements that compose an episode. An episode is a set of ordered registers that comply the following requirements: The first element is greater than zero. The previous element of the first one is zero. The last element…
SQLite – How to use VARIABLE for TABLE NAME + VARIABLE FOR INSERT VALUES
im new in programing, starting with python I found this script in a post (link below) query = ‘SELECT * FROM {}’.format(table) c.execute(query) How to use variable for SQLite table name it worked, …
SQLite Select data where the column name contains a string and create a table with those headers only
Following from the answer to this question: SQLite Select data where the column name contains a string? I would like to know how to create a table with these new columns obtained from the previous table. I wrote something like this (Please ignore the WHERE statement): however, it is not working. Any help in t…
Android studio SQL – How to return data in a string array
I have an SQL method here. I would like to return the data in a String[] array. How do I do that exactly? Thank you! Answer You must define the array’s length and this can be done only after the Cursor fetches all the rows. Then set its length to the nimber of rows of the Cursor. Then inside the
How to make generic SQL heredocs?
I’m making a mock ORM in Ruby, storing ‘forum’ data. I have the following tables: users (id, fname, lname), and questions (id, title, body, author_id). a_user.create and a_question.create are more or less the same: I’m writing another class, ModelBase, and I’d like to be able to …
SQL – How to return a list of data
I have this SQL method below, it is suppose to return multiple rows of data, but it is only returning one item every time I try to display the data. How do I fix that? Answer Inside the while loop in each iteration you change the value of LikeSong, so when the loop ends, LikeSong has the last value assigned
PB / SQLite3 JOIN COMPARE TABLES
I have Two tables : T1 T2 In SQLITE3 I search for n1T2 and n2T2 names, the count of same values between i1T1 and i1T2 I var_dump for display, in wait best method Answer It looks like you want a join and aggregation:
How to check if one of several fields is in the set?
I am generating the SQL queries from the C++ code. (sqllite3) I need to write efficiently the following request. How to optimize it: avoid pasting two times (V1, V2, V3, …), or take sets intersection of (T.field1, T.field2) and (V1, V2, V3, …), or create statement local variable (V1, V2, V3, ̷…