The best way I’ve found to handle this is to have a floating point order field. When you move something between two other items, set that field to halfway between its neighbors. This is cheap on both reads and writes. The only downside is the floats keep getting longer 🙂
As of Jan 2017 the sqlite3 limits page defines the practical limits to this question based on the maximum size of the database which is 140 terabytes: Maximum Number Of Rows In A Table The theoretical maximum number of rows in a table is 2^64 (18446744073709551616 or about 1.8e+19). This limit is unreachable since the … Read more
You can add it from the instructions in the page http://www.postgresql.org/download/linux/ubuntu/ Create the file /etc/apt/sources.list.d/pgdg.list, and add a line for the repository deb http://apt.postgresql.org/pub/repos/apt/ trusty-pgdg main Import the repository signing key, and update the package lists wget –quiet -O – https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo apt-key add – sudo apt-get update && sudo apt-get install postgresql-9.4
I had the same problem recently. I did these 3 things and it worked: Made sure the Collation of the exported database is the same as the newly created one. Made these changes in my php.ini(xampp/php/php.ini) file max_execution_time = 5000 max_input_time = 5000 memory_limit = 1000M post_max_size = 750M upload_max_filesize = 750M Made this change … Read more
You can use the sp_MSforeachtable stored procedure like so: USE MyDatabase EXEC sp_MSforeachtable ‘TRUNCATE TABLE ?’ Be warned that this will delete (by truncation) ALL data from all user tables. And in case you can’t TRUNCATE due to foreign keys etc. you can run the same as a delete: USE MyDatabase EXEC sp_MSforeachtable ‘DELETE FROM … Read more
Pros of putting images in a Database. Transactions. When you save the blob, you can commit it just like any other piece of DB data. That means you can commit the blob along with any of the associate meta-data and be assured that the two are in sync. If you run out of disk space? … Read more
You can get city/state information in tab-separated value format from GeoNames.org. The data is free, comprehensive and well structured. For US data, grab the US.txt file at the free postal code data page. The readme.txt file on that page describes the format.
Try DbVisualizer, it works for any database and I particularly like the way it arranges large diagrams. Check the Personal evaluation license.
Expanding on Randolpho’s answer: The metadata property specifically points to the location of the .SSDL (Storage Model,) .CSDL (Conceptual Model,) and .MSL (Mapping Model) files. These three files essentially are the Entity Data Model. The “res://” URI-style qualifier indicates that the files are embedded as resources in the compiled EDM assembly.
Disclaimer: I would no longer recommend OrientDB, see my comments below. I can provide a slightly less biased opinion, having used both ArangoDB and OrientDB. It’s still biased as I’m the author of OrientDB’s node.js driver – oriento but I don’t have a vested interest in either company or product, I’ve just necessarily used OrientDB … Read more