srakabands.blogg.se - Portable version of the db browser for sqlite

PORTABLE VERSION OF THE DB BROWSER FOR SQLITE INSTALL

In most cases, you can leave this to the default value. Other options are NOCASE, which is case-insensitive, and RTRIM, which ignores trailing white space.

Collation: Sqlite can use different methods of string comparison.

For example, you might check that the value in a phone number field has at least 10 characters.

Check: A field can have a check performed on it when a record is added.

Default: A default value will be provided if a record is added that has no value in this field.

U (Unique): This field in each record must hold a unique value, meaning there can’t be any duplicates in this field in the table.

We used this in the “id” field in the example we covered above.

AI (Auto-Incrementing): Numeric fields can be automatically filled in, with the next highest unused value.

There can only be one primary key in a table. In a table of user accounts, though, it might be a username. This might be a simple numeric value, like the auto-incrementing integer fields we covered above.

PK (Primary Key): A field (or group of fields) that provides a unique identifier for the records in the table.

If you try to add a record without providing a value for this field, it will be rejected.

NN (Not Null): When this option is set, the field can’t be left empty.

The checkboxes and other options next to each field allow you to add the following behaviors: We’ve added a text field to hold the name of the eagle, and a real (floating point) numeric field to hold the wingspan. Name your new table (we’ve called ours “eagles”), and then click “Add Field.” You can now type a name for the field and select the type of information it will contain from the “Type” drop-down menu. The “Edit Table Definition” dialog appears. You can then export your data as SQL or CSV. This contains the instructions necessary to re-create a database and insert its data into a database.Īnother common format used to import table definitions and data is the comma-separated values (CSV) format. You can use a data-generation site, such as Database Test Data, to generate dummy data for practicing purposes. Sometimes, you might be given or sent a database dump file in SQL format. We’re going to look at two ways you can import both data and database table definitions, as well as how you can create your own database. When DB4S starts, it doesn’t have a database loaded into it. On Manjaro, we use pacman: sudo pacman -Sy sqlitebrowser

PORTABLE VERSION OF THE DB BROWSER FOR SQLITE INSTALL

On Fedora, you type: sudo dnf install sqlitebrowser To install DB4S on Ubuntu, use the following command (again, note the installation still uses the old name): sudo apt-get install sqlitebrowser You can make sure the command does what you think it’s going to before you hard-code some SQL into your application. Browse and search for database records.Create, edit, and delete tables and indexes.Import and export tables and data in CSV format.Import and export database schemas, tables, and data in SQL format.In fact, the website for the project still uses “sqlitebrowser” as its domain, and the old name is also used during the installation of DB4S. You’ll still see references to the old name here and there. So, SQLite Browser was renamed DB Browser for SQLite. In fact, SQLite’s database file format is so well regarded, it’s one of only a handful recommended by the Library of Congress for long-term data storage. You can even move it to a machine running a different operating system by copying one file. It simplifies your application’s installation routines and lowers the minimum hardware requirements for your application.Īdditionally, because SQLite uses a single cross-platform file for its database tables, indexes, and schemas, the entire database can be moved to another computer. Having a capable, self-contained database engine tucked away inside your application removes a lot of problems. SQLite also has a command-line tool for manipulating databases, but it’s the library that’s made it a triumph.

This means you don’t have to provide an external SQL database server, like MySQL, MariaDB, or Microsoft SQL Server. The database engine becomes an integral part of the product. It’s a fast, lightweight library that’s incorporated (or linked, in developer-speak) in other applications. The incredible reach of the SQLite database is due to its architecture.