List of Tables, Db Schema, Dump etc Using the Python SQLite3 API

List of tables, db schema, dump etc using the Python sqlite3 API

You can fetch the list of tables and schemata by querying the SQLITE_MASTER table:

sqlite> .tab
job         snmptarget  t1          t2          t3        
sqlite> select name from sqlite_master where type = 'table';
job
t1
t2
snmptarget
t3

sqlite> .schema job
CREATE TABLE job (
    id INTEGER PRIMARY KEY,
    data VARCHAR
);
sqlite> select sql from sqlite_master where type = 'table' and name = 'job';
CREATE TABLE job (
    id INTEGER PRIMARY KEY,
    data VARCHAR
)

Using python3 and connected to sqlite3 I want to display tables that are in my database, . in .tables keeps giving error and \ is not helpful

You need to remove the "." from _sql because you are executing a sql command which does not accept "."

Using Python, export SQLite schema

Well. Rewritten the answer above. It that exactly what you need?

import sqlite3

dbname = 'chinook.db'

with sqlite3.connect(dbname) as con:
    cursor = con.cursor()
    cursor.execute('select sql from sqlite_master')
    for r in cursor.fetchall():
        print(r[0])
    cursor.close()

With the test sqlite3 database I received the following:

CREATE TABLE "albums"
(
    [AlbumId] INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
    [Title] NVARCHAR(160)  NOT NULL,
    [ArtistId] INTEGER  NOT NULL,
    FOREIGN KEY ([ArtistId]) REFERENCES "artists" ([ArtistId]) 
                ON DELETE NO ACTION ON UPDATE NO ACTION
)
CREATE TABLE sqlite_sequence(name,seq)
CREATE TABLE "artists"
(
    [ArtistId] INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
    [Name] NVARCHAR(120)
)
CREATE TABLE "customers"
(
    [CustomerId] INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
    [FirstName] NVARCHAR(40)  NOT NULL,
    [LastName] NVARCHAR(20)  NOT NULL,
    [Company] NVARCHAR(80),
    [Address] NVARCHAR(70),
    [City] NVARCHAR(40),
    [State] NVARCHAR(40),
    [Country] NVARCHAR(40),
    [PostalCode] NVARCHAR(10),
    [Phone] NVARCHAR(24),
    [Fax] NVARCHAR(24),
    [Email] NVARCHAR(60)  NOT NULL,
    [SupportRepId] INTEGER,
    FOREIGN KEY ([SupportRepId]) REFERENCES "employees" ([EmployeeId]) 
                ON DELETE NO ACTION ON UPDATE NO ACTION
)
CREATE TABLE "employees"
(
    [EmployeeId] INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
    [LastName] NVARCHAR(20)  NOT NULL,
    [FirstName] NVARCHAR(20)  NOT NULL,
    [Title] NVARCHAR(30),
    [ReportsTo] INTEGER,
    [BirthDate] DATETIME,
    [HireDate] DATETIME,
    [Address] NVARCHAR(70),
    [City] NVARCHAR(40),
    [State] NVARCHAR(40),
    [Country] NVARCHAR(40),
    [PostalCode] NVARCHAR(10),
    [Phone] NVARCHAR(24),
    [Fax] NVARCHAR(24),
    [Email] NVARCHAR(60),
    FOREIGN KEY ([ReportsTo]) REFERENCES "employees" ([EmployeeId]) 
                ON DELETE NO ACTION ON UPDATE NO ACTION
)
CREATE TABLE "genres"
(
    [GenreId] INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
    [Name] NVARCHAR(120)
)
CREATE TABLE "invoices"
(
    [InvoiceId] INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
    [CustomerId] INTEGER  NOT NULL,
    [InvoiceDate] DATETIME  NOT NULL,
    [BillingAddress] NVARCHAR(70),
    [BillingCity] NVARCHAR(40),
    [BillingState] NVARCHAR(40),
    [BillingCountry] NVARCHAR(40),
    [BillingPostalCode] NVARCHAR(10),
    [Total] NUMERIC(10,2)  NOT NULL,
    FOREIGN KEY ([CustomerId]) REFERENCES "customers" ([CustomerId]) 
                ON DELETE NO ACTION ON UPDATE NO ACTION
)
CREATE TABLE "invoice_items"
(
    [InvoiceLineId] INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
    [InvoiceId] INTEGER  NOT NULL,
    [TrackId] INTEGER  NOT NULL,
    [UnitPrice] NUMERIC(10,2)  NOT NULL,
    [Quantity] INTEGER  NOT NULL,
    FOREIGN KEY ([InvoiceId]) REFERENCES "invoices" ([InvoiceId]) 
                ON DELETE NO ACTION ON UPDATE NO ACTION,
    FOREIGN KEY ([TrackId]) REFERENCES "tracks" ([TrackId]) 
                ON DELETE NO ACTION ON UPDATE NO ACTION
)
CREATE TABLE "media_types"
(
    [MediaTypeId] INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
    [Name] NVARCHAR(120)
)
CREATE TABLE "playlists"
(
    [PlaylistId] INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
    [Name] NVARCHAR(120)
)
CREATE TABLE "playlist_track"
(
    [PlaylistId] INTEGER  NOT NULL,
    [TrackId] INTEGER  NOT NULL,
    CONSTRAINT [PK_PlaylistTrack] PRIMARY KEY  ([PlaylistId], [TrackId]),
    FOREIGN KEY ([PlaylistId]) REFERENCES "playlists" ([PlaylistId]) 
                ON DELETE NO ACTION ON UPDATE NO ACTION,
    FOREIGN KEY ([TrackId]) REFERENCES "tracks" ([TrackId]) 
                ON DELETE NO ACTION ON UPDATE NO ACTION
)
None
CREATE TABLE "tracks"
(
    [TrackId] INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
    [Name] NVARCHAR(200)  NOT NULL,
    [AlbumId] INTEGER,
    [MediaTypeId] INTEGER  NOT NULL,
    [GenreId] INTEGER,
    [Composer] NVARCHAR(220),
    [Milliseconds] INTEGER  NOT NULL,
    [Bytes] INTEGER,
    [UnitPrice] NUMERIC(10,2)  NOT NULL,
    FOREIGN KEY ([AlbumId]) REFERENCES "albums" ([AlbumId]) 
                ON DELETE NO ACTION ON UPDATE NO ACTION,
    FOREIGN KEY ([GenreId]) REFERENCES "genres" ([GenreId]) 
                ON DELETE NO ACTION ON UPDATE NO ACTION,
    FOREIGN KEY ([MediaTypeId]) REFERENCES "media_types" ([MediaTypeId]) 
                ON DELETE NO ACTION ON UPDATE NO ACTION
)
CREATE INDEX [IFK_AlbumArtistId] ON "albums" ([ArtistId])
CREATE INDEX [IFK_CustomerSupportRepId] ON "customers" ([SupportRepId])
CREATE INDEX [IFK_EmployeeReportsTo] ON "employees" ([ReportsTo])
CREATE INDEX [IFK_InvoiceCustomerId] ON "invoices" ([CustomerId])
CREATE INDEX [IFK_InvoiceLineInvoiceId] ON "invoice_items" ([InvoiceId])
CREATE INDEX [IFK_InvoiceLineTrackId] ON "invoice_items" ([TrackId])
CREATE INDEX [IFK_PlaylistTrackTrackId] ON "playlist_track" ([TrackId])
CREATE INDEX [IFK_TrackAlbumId] ON "tracks" ([AlbumId])
CREATE INDEX [IFK_TrackGenreId] ON "tracks" ([GenreId])
CREATE INDEX [IFK_TrackMediaTypeId] ON "tracks" ([MediaTypeId])
CREATE TABLE sqlite_stat1(tbl,idx,stat)

How can I list the tables in a SQLite database file that was opened with ATTACH?

The .tables, and .schema "helper" functions don't look into ATTACHed databases: they just query the SQLITE_MASTER table for the "main" database. Consequently, if you used

ATTACH some_file.db AS my_db;

then you need to do

SELECT name FROM my_db.sqlite_master WHERE type='table';

Note that temporary tables don't show up with .tables either: you have to list sqlite_temp_master for that:

SELECT name FROM sqlite_temp_master WHERE type='table';