8/9/2023 0 Comments .db sqlite![]() I did not have the case of a circular dependency, I guess you can suspend temporarily the key checking if that is the case. Now you can try to load the resulting csv with PostgreSQL (even graphically with the admin tool), with the only caveat that you must load the tables with foreign keys after you have loaded the tables with the corresponding source keys. This works like a charm, is easy to write, read and debug each function, unlike (for me) the regular expressions. #df = other_transform(df, other_column_name)ĭf.to_csv(table_name + '.csv'), sep=',', header=False, index=False) Suppose you have a table with a bool field (which is 0/1 in sqlite, but must be t/f in PostgreSQL) def int_to_strbool(df, column):ĭf = pd.read_sql(f'select * from ', conn)ĭf = int_to_strbool(df, bool_column_name) I have tried editing/regexping the sqlite dump so PostgreSQL accepts it, it is tedious and prone to error.įirst recreate the schema on PostgreSQL without any data, either editing the dump or if you were using an ORM you may be lucky and it talks to both back-ends (sqlalchemy, peewee. To prove the concept I dumped this testdb and imported into a development environment on a production server and the data transferred over nicely. I know if I had tried to run one of these scripts or do the stepwise conversion mentioned herein, I would have spent much more time. I then created a testdb with createdb:Īfter some queries to check the data, it appears it worked quite well. Set work_mem to '16MB', maintenance_work_mem to '512 MB' With include drop, create tables, create indexes, reset sequences I installed from the *.deb and created a command file like this in a test directory: load database ![]() You can convert the flat SQLite file into a usable PostgreSQL database. Pretty cool application and it's relatively easy to use. I looked up the wiki docs:Īnd discovered pgloader. I started looking into the solutions here and realized that I was looking for a more automated method. Even though this post has an accepted answer (and a good one at that +1), I think adding this is important. I came across this post when searching for a way to convert an SQLite dump to PostgreSQL. Importing a big pile of data through SQL INSERTs might take a while but it'll work. The syntax in the SQLite dump file appears to be mostly compatible with PostgreSQL so you can patch a few things and feed it to psql. While SQLite defaults null values to '', PostgreSQL requires them to be set as NULL. Sqliteman - Simple sqlite3 browser and editor.įor tools supporting multiple DBMSs, see List of applications/Documents#Database tools.You should be able to feed that dump file straight into psql: /path/to/psql -d database -U username -W 0).DB Browser for SQLite - High quality, visual, open source tool to create, design, and edit database files compatible with SQLite.Search database sqlite> select * from tblone Sqlite> insert into tblone values('archlinux', 30) Insert data sqlite> insert into tblone values('helloworld',20) The SQLite library includes a simple command-line utility named sqlite3 that allows the user to manually enter and execute SQL commands against an SQLite database.Ĭreate a database $ sqlite3 databasename Create table sqlite> create table tblone(one varchar(10), two smallint) ![]()
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