SQLite: what is the path of my created-database? - sqlite

I have downloaded the "Precompiled Binaries for windows" for the "SQLite" from here. I opened the command-line-shell and followed this, creating one table named "tbl1".
now I am looking at my desk trying to find the database file which contains tbl1, but I can't find it anywhere.
my question is: after creating a database in the SQLite, where the database file is stored ? i.e.: what is the path of my created-database ?
I am using windows7 and have basic knowledge about SQL and database


By default (if no additional path is specified), the database is created in the current working directory.
That is, sqlite.exe ex1 creates the "ex1" database in the current directory. (Use cd from the same command shell to see what what the current working directory is.)
On the other hand, sqlite.exe C:\databases\ex1 would create the "ex1" database in the "C:\databases" directory.
To create the database on the desktop for the current user, something sqlite.exe "%USERPROFILE%\Desktop\ex1" should work. (This uses an environment variable called USERPROFILE which is expanded and used as part of the path.)
The same principle holds for any SQLite connection - the path to the database file is first resolved; either relative (as in the first case) or absolute (as in the second and third).


It creates the DB file in the given file path else by default it will create the file in your current working directory. If you can't find it then just search for the .db file inside your current project directory.

Related

Delphi TFDTable SqLite problems

I deployed a sample.s3db SqLite to my Delphi android project.
set folder to:
fdconnection1.params.Database := system.ioutils.TPath.Combine( system.ioutils.TPath.GetDocumentsPath, 'sample.s3db');
in FDConnection1BeforeConnect event.
in Project-Deployment, set folder to assets\internal\ for Android
However, when I run the app, apparently it can find the physical file, but it says my tablename "Customers" is not found.
so in the BeforeConnect code, if I add a CREATE TABLE SQL create code if not exists, then everything works well but of course the table is empty (whereas my deployed sample.s3db is not empty) ... which proves the FILE sample.s3db was found and not corrupted, but somehow the Table was not found.
Even tried to change in BeforeConnect
FDConnection1.Params.Values['OpenMode'] := 'ReadWrite';
but it still doesn't work.
Any ideas the table name does not work?
I tried to change table name to all caps, in case Android is case-sensitive but it also does not work.

I recommend deleting your app from the android. This will clear out your data. Otherwise your new sqlite file is not deployed if the file already exists. This could happen for instance if you made an error in the path at one point in time so sqlite just created an empty database.
Your connection string looks correct and so does your destination path. Just to be safe, you may also want to clear out your other values for your connection.
fdConnection1.ConnectionDefName:= '';

How to get filename from Oracle Directory from PL/SQL?

I have created an Oracle Directory on my local computer (c:\temp),
and as an example I also put several files inside that directory:
word.docx
excel.xls
pic.jpeg
pdf.pdf
My question is how I can get all the filenames inside that directory from PL/SQL?
Thank you

You can't. PL/SQL doesn't provide a function to list the contents of a directory.
Assuming that the Oracle database is installed on your local server (the database generally cannot access files stored on the client file system) you can, however, create a Java stored procedure that lists the contents of an operating system directory and call that from PL/SQL. The thread I links to provides one implementation of this sort of procedure. There are other implementations floating around on the internet as well.

Where is the DB_CONFIG file of Berkeley database located in Unix?

i'm new to Berkeley db, i have installed the version "db-4.8.30.NC.tar.gz" but now i would like to find the configuration
information by using the configuration file.
I've read in the documentations that this file is named DB_CONFIG and it exists in the
database home directory.
In my system, i have uzipped the tar file under /usr/db-4.8.30.NC but i still haven't found
the DB_CONFIG file.
Well, i'm trying to find where the DB_CONFIG file is located in Unix, but i can't find it.
May you please help me?
Thanks, in advance

You (or a system administrator) writes the DB_CONFIG file by hand to modify any of the DB_ENV environment variables that can be over-ridden at runtime.
The DB_CONFIG file is stored in the db_home directory; the docs/programmer_reference/env_naming.html file has full details, but you can either pass an explicit db_home parameter in the DB_ENV->open() call or rely on the DB_HOME environment variable to locate the DB_CONFIG file, if any exists. The environment variable approach might be nice if the system administrator would reasonably want to move the storage around as they wish; the specific path name approach might be nice if you don't want to bother your system administrators with details of managing your storage.

How can I specify a RELATIVE JDBC SQLite url (path?)

I've been trying to get this work for two days and tried all suggestions that I could find. Alas, without success, so far.
This is what I'm trying to do: I am building a small (java swing) desktop database application. I'm using Netbeans 7.0 and SQLite, and found the JDBC driver from http://www.xerial.org/trac/Xerial/wiki/SQLiteJDBC to work fine as long as I specify an absolute path in the JDBC URL:
jdbc:sqlite://Users.../lib/db/ithildin.db
Here's how it looks in Netbeans' Services -> Databases tab, using an absolute URL:
opening the connection and then the tables node shows the available tables.
But because I intend to distribute this application to other people, using an absolute path is not going to work. From what I have read here and there it seems to be possible to also specify a relative path to the SQLite database file, but I cannot get it to work whatever I try.
The strange thing is that when I create a connection in Netbeans it initially seems to work when I put both the sqlite jdbc driver jar and the sqlite database file in a /db subdirectory in /lib (in the Netbeans project directory):
and when I open the new connection it maintains that illusion -
but when I open the "Tables" node it turns out to be empty:
Similary, this connection seems valid but as soon as I try to use it - for instance in "Generating Entity Classes From Database" it tells me that there aren't any tables in that database.
Does anyone know a way out of this? I'd much appreciate it.
Lúthien

I've followed the same steps that you have and my findings suggest that the relative path in the New Connection Wizard is relative to NetBeans' working directory which is the directory that NetBeans is installed to.
For example, in your connection string you are "connecting" to a database that resides at <NetBeans-Install-Dir>/ithildin-13-11-11.db. Since this database does not exist, SQLite is creating it for you which is giving you the "illusion" that you are seeing. In my tests, the database that I was trying to connect to with a relative path was created in the NetBeans install directory.
In other words, everything is working as designed.
In your code you can use a relative path and it should be relative to the top of your project's directory. In NetBeans' Databases Service you will need to either use an absolute path to connect to the database that exists (in your project) or you will need to provide a relative path that begins at NetBeans' install directory.
My suggestion is that you use a relative path in your code and an absolute path in the New Connection Wizard.

Where is SQLite database stored on disk?

Where is the SQLite database stored i.e. directory path on windows 7 when created ?

A SQLite database is a regular file. It is created in your script current directory.

.databases
If you run this command inside SQLite
.databases
it lists the path of all currently connected databases. Sample output:
seq name file
--- --------------- ----------------------------------------------------------
0 main /home/me/a.db

There is no "standard place" for a sqlite database. The file's location is specified to the library, and may be in your home directory, in the invoking program's folder, or any other place.
If it helps, sqlite databases are, by convention, named with a .db file extension.

If you are running Rails (its the default db in Rails) check the {RAILS_ROOT}/config/database.yml file and you will see something like:
database: db/development.sqlite3
This means that it will be in the {RAILS_ROOT}/db directory.

When you call sqlite3_open() you specify the filepath the database is opened from/saved to, if it is not an absolute path it is specified relative to your current working directory.

It depends on how you initialized the database. If you used the command line shell for SQLite (e.g. sqlite3 ex1) to create the database, it'll be a path from the root of your local machine. If you used a Python script to create the database, it'll be a path from your project.
To check the former, run the command line shell:
sqlite3
sqlite> .databases
To check the path in your project, you can print the path in the connection. For example:
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
DATABASE = 'db'
def get_db_connection():
print(os.path.join(BASE_DIR, DATABASE, "database.db"))
conn = sqlite3.connect(os.path.join(BASE_DIR, DATABASE, "database.db"))
conn.row_factory = sqlite3.Row
return conn

In my case I think it was an access issue. I saved the SQLite files to "C:/Program Files (x86)/sqlite". I CD'd there, ran sqlite3, and created a database called test.db:
As you can see, I ran .database, which told me the .db file was created in the same directory, so I went to confirm in File Explorer, and it wasn't there:
Curiously the database was working correctly in spite of this.
It was only through trial-and-error that I discovered that I could save in some locations, but not others. It appears to me that SQLite can't save to locations that require elevation. In my case, moving from Program Files to My Documents made the issue go away.
I find it quite irritating that SQLite doesn't just tell me "access denied" instead of trying to be clever and saving to some location that I can't even find.

In Windows machines (Windows 2010), by default, the new SQLite database files will be stored in the same folder where Sqlite3.EXE application is stored in your machine. However , we can create a new folder in Windows and within sqlite> prompt, you may use the .cd to change to the new working directory.
It is a good idea to give a .db file extension to the new database files that you create (even though it is not mandatory to have any file extension)
The SQLite command, .databases will show the default database "main" or currently created or currently opened database or all "attached" database files with file path. The .attach is useful to attach more than one database file to the current connection when we want to work with tables belonging to different databases.
Regards,
Biju Joseph N.,
Houston TX, USA (January 12, 2023)
the database path will be displayed, when using .databases

SQLite is created in your python directory where you installed the python.

SQLit Database is simply a file where your local data is stored on your local machine

In Windows 10 if in the prompt command the path where you start sqlite is
C:\users\USER_NAME
You can find it in the user home folder.
The .db file is stored where you start the sqlite command.
I hope this solve the issue

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