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

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how to import .xls file into SQLite database?

I have an issue with importing .xls file into SQLite database. I am working on windows xp and using a SQLite manager for maintain the database. I can import the .csv file to the database by using ...
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1answer
3k views

disk I/O error in SQLite

What are the possible things that would trigger the "disk I/O error"? I've been having this problem and I couldn't find a solution. I have a SQLite3 database, and I'm trying to insert data from a file ...
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1answer
342 views

How to output query to file using SQLite3

Is there an equivalent to Oracle's spool for sqlite3?
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2answers
80 views

checking number of occupied occupied neighbours [closed]

Assuming a pixel grid with x and y of the size 1000 over 1000. In each iteration\run, using a random number generator, certain cells will be marked as occupied. Those cells will be written in a SQLite ...
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2answers
798 views

How to use CREATE TABLE … AS with Primary Key in SQLite

From SQLite documentation for CREATE TABLE http://www.sqlite.org/lang_createtable.html: A table created using CREATE TABLE AS has no PRIMARY KEY and no constraints of any kind. So is there any ...
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1answer
312 views

How to properly format sqlite shell output?

If I go to mysql shell and type SELECT * FROM users I get - +--------+----------------+---------------------------------+----------+-----------+--------------------+--------------------+ | USERID | ...
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1answer
117 views

Database design: nested tagging

I have a situation that after an initial thought ended in the following tables: section: id, name section_tag: id, name section_tag_map: section_id, tag_id item: id, name ...
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1answer
257 views

Referencing multiple tables from a single table and store additional data

I have a database where I want to store lap time information from a racing game. I have tables for car, track, game, tuning and upgrade data and want to put all these together to create a single ...
2
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1answer
130 views

Read-only on an SQLite database which is being modified by another program

I wrote a program that has an SQLite database, modifying it every few seconds. Now I want to write a small gadget program that would just read a bit of info from that database (read-only) and display ...
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1answer
457 views

How to create view in SQLite using INSERT INTO? [closed]

I'm trying to create view that will summarize data in two tables. Each table have several columns, but they both have NAME and AREA columns. And I want these two columns to be united correspondingly ...
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2answers
1k views

SQLite writing a query where you select only rows nearest to the hour

I've got a set of data where data has been taken approximately every minute for about three month and the time has been stored as a UNIX timestamp. There is no regularity to the timestamp (i.e. the ...
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1answer
211 views

Constructing an SQL query with time intervals

I've a simple but large table in an SQL database which has four fields (id(int PK), time (unix timestamp, not null), value (double, not null) and an ID_fk (integer foreign key). Data is recorded ...
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2answers
101 views

Query to find Maximum friends not giving correct resuts [closed]

Table Schema for the Likes table: id id1 1 2 1 3 2 1 I count the total number of Likes for each student with this: select id,count(*) from friends group by id I have to find the students with ...
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116 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
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1answer
289 views

Delete with subquery with no unique columns

I have a table LIKES (ID1, ID2). Both id1 and id2 are non unique columns. Database is SQLite delete from LIKES where ID1 = 10 /// Wrong there more then one record with ID1=10 delete from LIKES ...
2
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1answer
176 views

Configuration options for relational algebra evaluator “ra.jar”

I am participating in the Stanford Database Class, and there are some problem sets to be solved in "mathy" relational algebra syntax. The course instructors demand from students to use this ...
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0answers
151 views

Calculate lower and upper quartile of SQLiteDB via query

I want to calculate the upper and the lower quartile of the value what I call "diffs" in these fiddle with my DB and the query How can I do this with SQLite? There's an extension on the ...
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1answer
224 views

Delete word, its meanings, its meaning's example sentences from DB

I have three tables as below (simplified for demonstration): words ===== integer id text word meanings ======== integer id integer word_id text meaning examples ======== integer id integer ...
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2answers
299 views

How can I simplify this query?

I have written the following SQLite query: SELECT sum(amount) / (julianday('now', '+1 day') - julianday('2012-08-11')) * 14 AS 'Cost Per Fortnight' FROM ( SELECT "transaction".transamount AS ...
2
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1answer
370 views

SQLite or CouchDB for Locational Data Mining Project?

I am currently designing a Data Mining Project where I am going to harvest rather large volumes of Twitter data in order to analyse locational data (geocoded tweets) and do some machine learning with ...
2
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2answers
313 views

Reordering data in a table

I have a table that stores sensor data (in SQLite) and looks like this; TABLE Timestream: idTimestream PK autoincrementing integer, time int not null, value float not null, idSensor integer not ...
2
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1answer
583 views

Enable autocomplete in an sqlite3 interactive shell

I am using sqlite3 on a machine where I can use tab completion (ie .read abc<tab> will autocomplete to .read abcdefghij.db. I would like to know how to enable this on my personal machine. Edit ...
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3answers
547 views

Many-to-Too-Many Relationship

I'm working on a book database. And among others, I have the following two tables (a bit simplified for the question): tblBook: ID, Title tblPerson: ID, Name Note that the tblPerson table contains ...
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2answers
3k views

For absolute performance, is SUM faster or COUNT?

This relates to counting the number of records that match a certain condition, e.g. invoice amount > $100. I tend to prefer COUNT(CASE WHEN invoice_amount > 100 THEN 1 END) However, this is ...
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1answer
77 views

sqlite database: advanced SQL or redesign

I've been programming for several years, but I'm pretty new to SQL(ite). I'm designing a database for a sort of a bookkeeping program. What I've got so far: orders (o INTEGER PRIMARY KEY, ...
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1answer
230 views

Structuring SQLite database with 2 relationships?

I'm current working on a SQLite-database in a android project which will store 3 types of objects; feed, users and posts. There will be several feeds containing several varying users(a user can be ...
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1answer
207 views

How can I create a MySQL database based on a SQLite schema?

I have MySQL on my server and different SQLite databases on a client. I'm trying to find a way to create the same databases on the server. Since a SQLite schema is actually a CREATE query, one way ...
2
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1answer
687 views

Working with multiple databases?

Using sqlite3 on Linux, how can one work with multiple databases? I'd like to do something like the following in database 1? sqlite3 database1.db insert into database1.mytable values (select * from ...
3
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1answer
357 views

Can I monitor the progress of importing a large .sql file in sqlite3 using zenity --progress?

I'm trying to monitor the progress of a sqlite3 command importing a large .sql file into a database using zenity --progress. I've tried the following which will import the file, however progress is ...
2
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0answers
404 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 ...
2
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1answer
517 views

Why is SQLite adding unused disk space to “free-list” after deleting a lot of data in a database?

The SQLite FAQ states the following: (12) I deleted a lot of data but the database file did not get any smaller. Is this a bug? No. When you delete information from an SQLite database, the ...
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1answer
1k views

Can I use SQLite to share data among different applications?

Can I use SQLite as a database to which 2 or more applications connect? I.e. can I use it to share data among different applications?
3
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2answers
293 views

Query for fetching records from SQLite database on Blackberry

I want to fetch data from SQLite database for Blackberry. There is one table with four columns: ID, FROM, TO, TIME I want to fetch record on the basis of FROM, and TO values. Where condition 1: ...
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1answer
89 views

Check ruby gem and SQLite3 for FTS3 or FTS4 support

I have installed SQLite3 on Mountain Lion via MacPorts and Ruby along with sqlite3 gem using RVM. I'd like to know if there's any way for me to understand if my SQLite3 installation supports FTS4. ...
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2answers
3k views

What program should I use to open .db3 files?

I have a series of .db3 files in my computer. They are like filename1.db3, filename2.db3, filename3.db3, filename4.db3 and so on. I can open filename1.db3 with sqlite editor. But when I open ...
4
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1answer
442 views

SQLite3 simple database design question

I'm an ruby hobbist with no experience at all related to databases. I'm writing an application that is going to gather and backup tweets and blog posts (via rss feed) in an SQLite3 database. The ...
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1answer
455 views

How to link data from a table to another table in sqlite database?

I need to link data from a table to another table. I'm not sure how to do this. I have never link a table to another table. Anyone can help me? Or maybe can give me examples or sample codes? Thanks =) ...
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1answer
188 views

Store a small log file as a blob in sqlite

I am utilizing a small sqlite database to keep track of some jobs that run on a linux box. Most of them have small (less than 50 lines) log files... I'd like to store those log files as a record in my ...
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2answers
119 views

Very slow request with small difference

I use sqlite3 on a Mac Mini. I'm a Java and Web programmer, with some SQL experience, not as much as an expert. I have three requests. First and second are fast (0.2s), and the third is very slow ...
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1answer
2k views

Combine column from multiple rows into one row in SQLITE

I have a sqlite-database with the schema Articles Id Name Tags Id Name ArticlesTags Id ArticleId TagId I´m trying to query for Articles.Name and a LIST of tags. Basically what I would want ...
7
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1answer
238 views

Performance of query with a range condition and order by

We have the following table (in SQLite on Android) which a tree structure (Nested Set model) of words and their frequencies: lexikon ------- _id integer PRIMARY KEY word text frequency integer ...
2
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1answer
858 views

Default values in SQLite3

When I created the table structure of my SQLite database, I provided a DEFAULT value which is used when no value is provided by the user. Now, because the application code changed, I need to modify ...
3
votes
1answer
255 views

Single AND operator and multiple OR operators

I wanted to select a record_id with a user_id of 1 and category_id can be 1, 2, or 3. Every SELECT statement should return 1 record. View my sample table here: http://i49.tinypic.com/2ezjtk8.png How ...
2
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1answer
1k views

Is there any way to get the position of a value in a table returned by a SELECT statement?

I have the following statement: SELECT id FROM myTable WHERE aCondition == 1 ORDER BY id which returns a table like this one for example: id 1 3 4 5 But what I need is to know the position of a ...
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1answer
792 views

How to create a train schedule in SQLite3?

I am interested in what a SQLite3 database schema would look like for a train timetable. Generally this is presented in table format as the final result. Sample Schedule for M to F STATION A ...
6
votes
2answers
4k views

Storing prices in SQLite, what data-type to use?

I am using SQLite and need to store prices. SQLite's REAL data-type says it uses floating-point which is unacceptable storage for prices. Is there a data-type besides TEXT that I can use to store ...
1
vote
1answer
859 views

Looking for a tool to convert between MySql, Sql Server CE, Sql Server and SQLite

Our old product supports 4 different database types for storing data: SQLite MySql Sql Server CE Sql Server There is also an export feature, which allows to export some data and here is the ...
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4answers
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RAM/memory based databases

I am looking for a RAM/memory based database, and these two seem to be interesting: SQLite Oracle Berkeley DB Do you have any other suggestions? I need more than one executable to be able to ...
3
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1answer
1k views

Postgres uuid: Use as primary key, or in addition to SERIAL -for disconnected app-

For a new SASS app with postgres 9, that will support disconnected clients. The client not will use the regular IDs, only the UUID. The clients will be on iOS, html5/python and perhaps later on other ...
4
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1answer
1k views

Why doesn't INSERT AFTER Trigger add all results?

I'm working on the exercises for db-class.org where we have to write a trigger that makes new students named 'Friendly' automatically like everyone else in their grade. That is, after the trigger ...