A popular open-source embeddable (i.e. non client-server) RDBMS implemented as a C library.

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3
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1answer
63 views

SQLite Like clause match whole word only

I have a SQLite database with a table named: minecraft +----+----------------------+ | id | name | +----+----------------------+ | 1 | Pocket Mine MP | | 2 | Open Computers ...
1
vote
1answer
44 views

Suitability of mysql and sqllite?

I am about to build a C# wpf application. I need to easily port the application e.g. one click installation. I am not sure should I use sqllite or mysql db? The range of data wont run into billion at ...
3
votes
0answers
42 views

Possible SQLite bug?

I am running into an issue with SQLite that I think might be a bug. When I run the PRAGMA table_info command on a view that uses an aggregate function, the data type always comes up empty. To ...
3
votes
0answers
304 views

Are there any known benchmarks/statistics on UnQLite?

I came across UnQLite the other day in Stack Overflow and it has me intrigued for some software I'm working on. However, very few tests have been published on how well it performs. There are plenty of ...
2
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0answers
124 views

Is it possible to store and query JSON in SQLite?

I need to store JSON objects in a SQLite database, and then do complex queries on it. I did a table like this: +--------------------------------------+ |document | property | string | number| ...
2
votes
0answers
22 views

sqlite3 foreign keys ignored

I am working on a small sqlite3 database for a small simple mailserver. I have created a new sqlite3 database and add executed this to pürepare it for data: BEGIN TRANSACTION; CREATE TABLE ...
2
votes
0answers
60 views

Spatialite: use of virtual spatial index for distances

I'm currently learning to use spatial access methods for query optimization. I'm going through the examples in spatialite cookbook and got stuck in here ...
2
votes
0answers
73 views

Improving performance of a weighted search query in SQLite3

For an intra-site search I have this table in an SQLite3 database, that relates ids to search terms with a certain weight: CREATE TABLE search_index ( id INTEGER(7) REFERENCES other_table, ...
2
votes
0answers
417 views

In-memory database vs RAM-disk

In SQLite, are there any differences in performance/features/reliability/... between: 1) an in-memory database: rc = sqlite3_open("file::memory:", &db); 2) a database on a RAM-disk? The ...
2
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0answers
632 views

SQLite Performance Tuning

I have the following query, which fetches data from only one table. It is a query which is supposed to return data for an autocomplete function. Autocomplete data can be in text1 or text2. The ...
1
vote
0answers
26 views

Merge databases with sql only: firefox places and visits

I have two tables in each of two dbs: places: id, url (unique), visits: id, place_id, timestamp, type. I need to merge those databases: There are one main database and one "to-merge". The unique ...
1
vote
0answers
29 views

SQLite reference table question

I'm using SQLite and Python for making a sensor network database. I have a table holding the nodes: NODE, another 2 tables for sensor specification: SENSOR_TYPE ("Temperature, Humidity...) and ...
1
vote
0answers
45 views

How to import Sqlite database into another Sqlite database?

Hello everyone I am developing Desktop Application and using the WebSql Database this database is created into this path: C:\Users\Admin\AppData\Local\Google\Chrome\User ...
1
vote
0answers
38 views

SQLite copy a sample of the database

I have a fairly complex sqlite database with several tables and indices. I'd like to copy a small subset of all the rows into a new database that I can use to test an app. Is there any builtin ...
1
vote
0answers
34 views

INSERT DATA The database disk image is malformed

We use sqllite to store our data. Today,when I wanted to insert data in sqllite db,the log showed The database disk image is malformed
1
vote
0answers
111 views

SQLite insertion with junction table

I need to write a transaction for SQLite, that adds a blog post and links it to content tags, and it seems to be a bit too complicated for me. Here's an example schema: CREATE TABLE blogpost( ...
1
vote
0answers
285 views

Migrate from SQLite to MySQL (then back)

For various reasons, I must use a SQLite database with a local application. However, I wrote a Flask app that enables users to more easily classify items in the database, and it runs very slow on ...
1
vote
0answers
1k views

SQLite Design: Better to have many tables with few columns or few tables with many columns?

I am struggling to figure out the best design for a Sqlite database that will hold data about Facebook pages so that I can calculate benchmarks for how the average Facebook page performs. I have an ...
1
vote
0answers
202 views

Regular Expression Integrity Constraints in SQLite3

In a SQLite3 CREATE TABLE statement, can I use a regular expression to enforce a particular constraint? Specifically, I am trying to require that an inputted URL is valid. I know there are other ways ...
0
votes
0answers
8 views

how to directly import a csv gzip'ed file into SQlite 3?

I'd like to import a 15GB file comma delimited gzip compressed file into Sqlite 3 without having to use temporary files. I'd like to run a command like: zcat input/surgical_code.csv.gz | tail -n ...
0
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0answers
36 views

Optimization beyond creating indexes

From the Explain query Output i already created db.execute("CREATE INDEX x1 ON TRAVELDAYS(Day, Value);") db.execute("CREATE INDEX x2 ON TRAINS(TrainDaysUID);") db.execute("CREATE INDEX x3 ON ...
0
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0answers
17 views

How to get row position in sqlite after sorting?

I have table, UUID | INT | LONG AAA | 1 | 123 BBB | 3 | 241 CCC | 2 | 145 And i sort it by INT value. SELECT * FROM table ORDER BY int_val DESC then i want to get a row from table and ...
0
votes
0answers
15 views

SQLite: choosing a unique separator

I'm working on a project that will result in an SQLite database of about 6 GB of text content (encoded UTF-8). The text will be diverse: it will have a great deal of plain text writing, but also a ...
0
votes
0answers
16 views

Switching SQLite environments

I submitted this on SuperUser without response; someone suggested I try it here. I like Firefox's SQLite Manager plugin because it's easy to show people how to use it. This is helpful if I want to ...
0
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0answers
52 views

How to import data from Sqlite into SQL Server 2012

I need to import data from sqlite into SQL Server so we can include it in our data warehouse. Based on previous system volume. Id expect there to be 50-100,000 rows after a couple of years. For ...
0
votes
0answers
23 views

force SQLite view column type affinity

Using SQLite 3, I have some view columns which are defined with an expression, and so have no type affinity. Is it possible to define them in a way that forces them to have a certain type affinity? ...
0
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0answers
29 views

No foreign key constraint with PRAGMA foreign keys

This is my code. It's SQLITE3 in Python 3. conn = sqlite3.connect(db) c = conn.cursor() c.execute('BEGIN') c.execute("PRAGMA foreign_keys = ON") c.execute('CREATE TABLE ...
0
votes
0answers
59 views

Database design for storing historical stock exchange Level2 (depth) data

I am developing C# software using embbeded SQLite Database which shows historical level2 (market depth - asks/bids) stock exchange data graph. Example Simply speaking, there are 25 asks (price, ...
0
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0answers
19 views

Structure of an SQLite database for storing analytics with counters and hits

Before making this post, I referred to this and this which contain extremely complex solutions and hence, this question: I am building a spam filtering app that takes posts from a feed and deletes ...
0
votes
0answers
50 views

SQLite no such column: table.columnName

I have a query SELECT Bookies.Name, Exchanges.Name, Bets.Completion_Date, Bets.BMStake, Bets.Liability, Bets.Profit, Bets.Type, ...
0
votes
0answers
44 views

SQLite table design for PK and/or UNIQUE

I'm trying to design a table in SQLite3, where I can perform these 2 actions. INSERT new row where a unique primary key is created. And INSERT new row with an given primary key Think of a ...
0
votes
0answers
23 views

Updating values with randomly generated values?

I've got an .sqlite3 database here. I want to replace all the values of a set distinct number of columns in the database with randomly generated values (the values should be unique). At the moment ...
0
votes
0answers
25 views

Storage strategy for polynomials

What is the most space efficient way to store arbitrary length univariate polynomials? I have a large amount of polynomials that look like 3*x^7 + 12*x - 13 9*x^32 - x^14 + 2*x^3 - 9 ... Each ...
0
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0answers
136 views

Get milliseconds from a DateTime in Sqlite3?

I have this DateTime in my database: 20130420070028401 is suppose to be: 2013-04-20T07:00:28.401 To "get" the milliseconds from 1970 I'm sub-stringing the DateTime: ...
0
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0answers
177 views

How to divide a big SQL Query into small query

I am trying to traverse the whole file system. I am picking each and every file and then trying to insert it into the SQLite Database. Before inserting I am also calculating the checksum of each file. ...
0
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0answers
31 views

Help in Designing a CBT database

Please i need help in modifying or remaking the database so that i can mark answers to questions immediately. The problem is some courses have 50 questions, while others have 100. How can i design ...
0
votes
0answers
210 views

trying to a lag a column in SQLite

Sorry if this is too basic for this forum, but I have had no luck in StackOverflow. I am a newbie to SQL. I am using SQLite. I have a table where rows represent individuals in a point in time. I am ...
0
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0answers
60 views

Bitfield in Database

What is the best way to store a Bitfield of 960 values in a Sqlite3-Database? I need to do queries of testing if the x-bit is set.
0
votes
0answers
179 views

Options for fastest guaranteed writes to a SQLite Shared cache in memory database

I have a multi-threaded python process, and I am using SQLite to store data between the processes. The flow is as follows: Main process created named in memory database, and table within the ...
0
votes
0answers
139 views

SQLite 3 Tree List Without CTE

I adapted a SQL statement to work with SQLite 3. But unfortunately Common Table Expressions and WITH clause works only in SQLite 3.6 ahead, but the users of my Open Source application are using SQLite ...
0
votes
0answers
61 views

Continuously copying an SQLite table

I have a SQLite database associated with an online application (Skype) on my computer, which is often changed by that application when I am using Internet. These are the columns of the database: ...
0
votes
0answers
281 views

insert record to child table which doesn't map to parent table - possible?

Actually I've 2 relevant questions: insert record to child table which doesn't map to parent table - possible? ON DELETE NO ACTION - when a record in parent table is deleted, it should affect ...
0
votes
0answers
28 views

Unable to open MONyogs

I was trying to run through the docs for manually working with the MONyog internal sqlite dbs for purposes of configuration automation. At the point trying to open the data file I get an error $ ...
0
votes
0answers
35 views

Approaching multiple values in same column

I'm developing an Android-application that scrapes the schedule for my university and presents it nicely since the current system is a nightmare. I'm processing a lot of data and it gets down to ...
0
votes
0answers
1k views

Storing currency with variable floating point in SQLite

We are working with currency and handle currencies from various countries. As a result, we may work with currencies that require no decimal values, two decimal places, three, sometimes four. We also ...
0
votes
0answers
2k views

SQLite Loop from SELECT QUERY

I have this long query which works one for processing one sale. What I'm trying to do is loop it until no more B.boughtPending = 0 and S.soldPending = 0 and then Select all the ones that ...
0
votes
0answers
2k views

SQLite UPDATE two tables from VIEW or TEMPORARY TABLE

Here is the query that doesn't compile just to show how it should look like. But since I can't do Multiple table UPDATE's. This fake query should be able to run the inner UPDATE's for both tables if ...
0
votes
0answers
2k views

Occasional disk I/O errors in SQLite

I have a very simple website running PHP and SQLite 3.7.9 (with PDO). After establishing the SQLite connection I immediately execute the following queries: PRAGMA busy_timeout=0; PRAGMA ...
0
votes
0answers
791 views

how to restore sqlite dump file to sqlite database using java?

I generated dump file from java using .dump command so my back-up is ready now I want to restore it to once again so can anyone help me how to restore? In stackoverflow I got this but nothing restore ...
-1
votes
0answers
13 views

Sqlite retaining huge memory even after transactions

I am using sqlite browser to run some queries. In case of queries which return huge data, sqlite consumes large amount of RAM and does not free it until the browser is closed / killed. Is there a way ...