This is probably a simple question, but I could use some help. I am trying to build a small database for an application that will only be run on my computer so I want to create a local database.
To do this I am trying to use sqlite. I can use the command prompt to make what seems to be a database by using the sqlite3 databaseName; functionality, but I do not know where it is being stored.
I need to be able to find the database to access it through the application I am experimenting with. I already know all of the basic sql and such for creating the database tables and data, but I cannot figure out how to simply make the database connection.
is there a way to specify where the database .db file will be stored, and why can I not find the file it seems to be making?
Using sqlite3 shell? Some help using sqlite3 -help:
Usage: sqlite3 [OPTIONS] FILENAME [SQL]
If FILENAME is not supplied, shell uses an temporary database.
If you start shell without supplying a filename, you may save temporary database at any time using:
sqlite> .backup MAIN "folder\your_file.extension"
Or you can ATTACH an existing database an use SQL methods:
sqlite> ATTACH DATABASE "path\stored.db" AS other;
sqlite> INSERT OR REPLACE INTO other.table1 SELECT * FROM this_table1;
sqlite> DETACH other;
For doing such things , you can use Sqlite Manager , you'll get it as a Firefox addon. It's excellent in creating / Managing Sqlite database.
https://addons.mozilla.org/en-US/firefox/addon/sqlite-manager/
Thanks everyone for answering, but it turns out my issue was much simpler than I thought.
I was trying to name the database after already starting the shell.
I was supposed to create the database from command line by doing sqlite3 name.db
But I was trying to use that command within the sqlite shell so nothing was being created.
Related
I am under strict corporate environment and don't have access to Postgres' psql. Therefore I can't do what's shown e.g. in the SO Convert SQLITE SQL dump file to POSTGRESQL. However, I can generate the sqlite dump file .sql. The resulting dump.sql file is 1.3gb big.
What would be the best way to import this data into Postgres? I also have DBeaver and can connect to both databases simultaneously but unfortunately can't do INSERT from SELECT.
I think the term for that is 'absurd', not 'strict'.
DBeaver has an 'execute script' feature. But who knows, maybe it will be blocked.
EnterpriseDB offers binary downloads. If you unzip those to a local drive you might be able to execute psql from the bin subdirectory.
If you can install psycopg2 or pg8000 for python, you should be able to connect to the database and then loop over the dump file sending each line to the database with cur.execute(line) . It might take some fiddling if the dump file has any multi-line commands, but the example you linked to doesn't show any of those.
I want to load chinook database in SQLite but I have no idea how can I do that.
First, I used this command but it just made a file without anything in it:
sqlite3 chinook.db
I also downloaded this archive that contains chinook database but I couldn't find chinook.db file to open it with this command:
.open chinook.db
If you have a copy of the chinook database then just use the restore database feature.
cd /home/sqlite
mv sample.db sample.db.old
sqlite3 sample.db < sample.bak
For more information go to http://www.ibiblio.org/elemental/howto/sqlite-backup.html
We should script the database before using it. Here is the link that discussed the whole procedure.
I am currently working on a project and I want to know how to save an sqllite database in rails as a csv file. I want it when you click the button, the current database on the system download. Can anybody help me? Thanks!
Your problem isn't really specific to Rails. Instead, you're mostly dealing with an administrative issue. You should write a script to export your database as csv, something like this:
#!/bin/bash
./bin/sqlite3 ./my_app/db/my_database.db <<!
.headers on
.mode csv
.output my_output_file.csv
select * from my_table;
!
This script exports a single table. If you have additional tables, you'll want to add them to your script.
The only Rails related issue is the matter of calling that script. Save the script within your application structure; I'd suggest my_app/assets or some similar location.
Now you can run that script using system(command) where command is the absolute path for your script, within a set of double-quotes.
I created a fresh database in phpmyadmin which does not contain any tables yet since its fresh, however I accidentally made a typo. How can I rename the database?
If this happens to me I usually just execute the SQL command:
DROP DATABASE dbname;
and create another database. But is it possible to rename it? I was already searching SO but found nothing helpful.
I found two possible solutions.
Rename it via the phpmyadmin backend UI (preferable):
Or just execute this SQL (only use it if the database is fresh and does not contain any data yet, otherwise it will be lost!)
CREATE DATABASE newname;
DROP DATABASE oldname;
ALTER DATABASE oldName MODIFY NAME = newName
I don't think you can do this. I think you'll need to dump that database, create the newly named one and then import the dump.
If this is a live system you'll need to take it down. If you cannot, then you will need to setup replication from this database to the new one.
If you want to see the commands try this link, Rename MySQL database
Try using an aux temporary db (as copy of the original)
$ mysqldump dbname > dbname_dump.sql //create a backup
$ mysqladmin create dbname_new //create your new db with desired name
$ mysql dbname_new < dbname_dump.sql //restore the backup to the new one
$ mysql drop database dbname; //drop old one
Hai i am a beginner of Database,
i have a .sql file which contains some tables of data, i want to know how to import them and how to view the list of tables.
presently im using the following:-
software or editor : navicat lite
server : localhost.
databse file format: .sql
Maybe you can try to execute the script in sql server, then type
select * from [database_name].information_schema.tables
to view tables and relevant information.
Remember that a sql file is not really a database, it is a script. You can run the script from any tool, but I'd use command line. This is navicat connected to mysql?
mysql -u username -p databasename < script.sql
password: **
And then the results can be seen using navicat or any other tool
If the .sql file has statements such as "CREATE TABLE..." and then later on "INSERT INTO..." then the script is possibly creating the tables and inserting the data.
To allow that to happen, the tables need to not exist in the database. You can then run the script and it will create the tables and fill in the data.
If the tables do exist, you can always either delete them, or change the CREATE to an ALTER and the script should then run.
Hope that helps.