How To Download Sqlite For Android

SQLite offers a lot of different installation packages, depending on your operating systems. It also offers a lot of APIs for a broad range of programming languages.

  1. How To Download Sqlite For Android Download
  2. Android Studio Sqlite Database Examples
  3. Sqlite Apps For Windows 10
  4. Sqlite Reader

In this tutorial, you will learn-

Download & Install SQLite Package Installer

Installation packages available for Windows 10 users:

SQLite is a in-process library that implements a self-contained, serverless, zero-configuration, transactional SQL database engine. The code for SQLite is in the public domain and is thus free for.

From the SQLite official website in the download section. The following screenshot allows you to download different SQLite's installation packages for Windows:

The command line shell program:

The highlighted download package is called the Command-Line Program (CLP). CLP is a command line application that let you access the SQLite database management system and all the features of the SQLite. Using CLP, you can create and manage the SQLite database. And it is the tool that we will use throughout the tutorial.

  • 32-bit DLL(x86): The SQLite Database system core library for x86 platforms.
  • 64-bit DLL (x64): The SQLite Database system core library for x64 platforms.

Installing the Command-Line Program (CLP) on your machine:

In the following steps, you will find the steps for how to install the Command-Line Program (CLP) on your machine:

Step 1) Download the highlighted download package from the previous image to your PC. It is a 'zip' file.

Step 2) Extract the zip file. You will find the 'sqlite3.exe' in the extracted file as following:

Step 3) Open My Computer, and double-click the partition 'C' to navigate to it:

Step 4) Create a new directory 'sqlite':

How To Download Sqlite For Android

Step 5) Copy the file 'sqlite3.exe' into it. This is what we will use through the tutorials to run SQLite queries:

However, there are some other packages for different purposes. They are not required. But you might need it if you are using a different OS than Windows you can get the Linux or Mac OS version of SQLite.

Also, you can get the documentation or source code from there if you wish. You can also get the API for Windows Phone 8 or .Net and other programming languages.

Here are some other different packages for different purposes:

  • The Source Code and some alternative Source Code Formats – The complete source code that made up the SQLite.
  • The documentation – The documentation of the SQLite as HTML pages. It is the same online documentation, but downloadable as HTML page so that you can open them offline.
  • Precompiled Binaries for Linux.
  • Precompiled Binaries for Mac OS X (x86).
  • Precompiled Binaries for Windows Phone 8 – SDK and components to develop an application for Windows Phone 8 that uses SQLite databases.
  • Precompiled Binaries for Windows Runtime – SDK and other components for developing an application to connect to SQLite databases for the Windows Runtime platforms.
  • Precompiled Binaries for .NET – these are some set of DLLs and .NET libraries that you can use them from .NET application to connect to SQLite databases.

SQLite Studio – Manager and Administration

There are lots of SQLite management tools that make working with SQLite databases easier. Instead of creating and managing databases using a command line, these tools provide a set of GUI tools that let you create and manage the database.

The official SQLite website has dozens of such tools listed; you can view them from here: SQLite Management Tools. Here is the recommended one

SQLite Studio: It is a portable tool that doesn't require an installation. It supports both SQLite3 and SQLite2. You can easily import and export data to various formats like CSV, HTML, PDF, JSON. Its open source and supports Unicode.

Introducing Sample database

In the following steps, we will create the sample database that we will use throughout the tutorials:

Step 1) Open a text file and paste the following commands into it:

Step 2) Save the file as 'TutorialsSampleDB.sql' in the following directory 'C:sqlite'.

Step 3) Open the Windows Command Line tool (cmd.exe) from the start menu, type 'cmd' and open it.

How To Download Sqlite For Android Download

Step 4) It will open in the default path, you need to navigate to the 'C:sqlite' folder we had created earlier in this tutorial by the following command 'cd 'C:sqlite':

Step 5) Write the following command,

The command should be completed successfully, and you should see no output after that command as the following screenshot:

Step 6) You should now be able to see the database file 'TutorialsSampleDB.db' created in the directory 'C:sqlite':

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Android Studio Sqlite Database Examples

Saving data to a database is ideal for repeating or structured data,such as contact information. This page assumes that you arefamiliar with SQL databases in general and helps you get started withSQLite databases on Android. The APIs you'll need to use a databaseon Android are available in the android.database.sqlite package.

Caution: Although these APIs are powerful, they are fairly low-level and require a great deal of time and effort to use:

  • There is no compile-time verification of raw SQL queries. As your data graph changes, you need to update the affected SQL queries manually. This process can be time consuming and error prone.
  • You need to use lots of boilerplate code to convert between SQL queries and data objects.

For these reasons, we highly recommended using the Room Persistence Library as an abstraction layer for accessing information in your app's SQLite databases.

Sqlite download for windows 10

Define a schema and contract

One of the main principles of SQL databases is the schema: a formaldeclaration of how the database is organized. The schema is reflected in the SQLstatements that you use to create your database. You may find it helpful tocreate a companion class, known as a contract class, which explicitly specifiesthe layout of your schema in a systematic and self-documenting way.

A contract class is a container for constants that define names for URIs,tables, and columns. The contract class allows you to use the same constantsacross all the other classes in the same package. This lets you change a columnname in one place and have it propagate throughout your code.

A good way to organize a contract class is to put definitions that areglobal to your whole database in the root level of the class. Then create an innerclass for each table. Each inner class enumerates the corresponding table's columns.

Note: By implementing the BaseColumnsinterface, your inner class can inherit a primarykey field called _ID that some Android classes such as CursorAdapter expect it to have. It's not required, but this can help your databasework harmoniously with the Android framework.

For example, the following contract defines the table name and column names for asingle table representing an RSS feed:

Create a database using an SQL helper

Once you have defined how your database looks, you should implement methodsthat create and maintain the database and tables. Here are some typicalstatements that create and delete a table:

Just like files that you save on the device's internalstorage, Android stores your database in your app's private folder. Your data issecure, because by default this area is notaccessible to other apps or the user.

The SQLiteOpenHelper class contains a usefulset of APIs for managing your database.When you use this class to obtain references to your database, the systemperforms the potentiallylong-running operations of creating and updating the database only whenneeded and not during app startup. All you need to do is callgetWritableDatabase() orgetReadableDatabase().

Note: Because they can be long-running,be sure that you call getWritableDatabase() or getReadableDatabase() in a background thread,such as with AsyncTask or IntentService.

To use SQLiteOpenHelper, create a subclass thatoverrides the onCreate() andonUpgrade() callback methods. You mayalso want to implement theonDowngrade() oronOpen() methods,but they are not required.

For example, here's an implementation of SQLiteOpenHelper thatuses some of the commands shown above:

To access your database, instantiate your subclass ofSQLiteOpenHelper:

Put information into a database

Insert data into the database by passing a ContentValuesobject to the insert() method:

The first argument for insert()is simply the table name.

The second argument tells the framework what to do in the event that theContentValues is empty (i.e., you did notput any values).If you specify the name of a column, the framework inserts a row and setsthe value of that column to null. If you specify null, like in thiscode sample, the framework does not insert a row when there are no values.

The insert() methods returns the ID for thenewly created row, or it will return -1 if there was an error inserting the data. This can happenif you have a conflict with pre-existing data in the database.

Read information from a database

To read from a database, use the query() method, passing it your selection criteria and desired columns.The method combines elements of insert()and update(), except the column listdefines the data you want to fetch (the 'projection'), rather than the data to insert. The resultsof the query are returned to you in a Cursor object.

The third and fourth arguments (selection and selectionArgs) arecombined to create a WHERE clause. Because the arguments are provided separately from the selectionquery, they are escaped before being combined. This makes your selection statements immune to SQLinjection. For more detail about all arguments, see thequery() reference.

To look at a row in the cursor, use one of the Cursor movemethods, which you must always call before you begin reading values. Since the cursor starts atposition -1, calling moveToNext() places the 'read position' on thefirst entry in the results and returns whether or not the cursor is already past the last entry inthe result set. For each row, you can read a column's value by calling one of theCursor get methods, such as getString() or getLong(). For each of the get methods,you must pass the index position of the column you desire, which you can get by callinggetColumnIndex() orgetColumnIndexOrThrow(). When finishediterating through results, call close() on the cursorto release its resources.For example, the following shows how to get all the item IDs stored in a cursorand add them to a list:

Delete information from a database

To delete rows from a table, you need to provide selection criteria thatidentify the rows to the delete() method. Themechanism works the same as the selection arguments to thequery() method. It divides theselection specification into a selection clause and selection arguments. Theclause defines the columns to look at, and also allows you to combine columntests. The arguments are values to test against that are bound into the clause.Because the result isn't handled the same as a regular SQL statement, it isimmune to SQL injection.

The return value for the delete() methodindicates the number of rows that were deleted from the database.

Update a database

When you need to modify a subset of your database values, use theupdate() method.

Updating the table combines the ContentValues syntax ofinsert() with the WHERE syntaxof delete().

The return value of the update() method isthe number of rows affected in the database.

Persisting database connection

Sqlite Apps For Windows 10

Since getWritableDatabase()and getReadableDatabase() areexpensive to call when the database is closed, you should leave your database connectionopen for as long as you possibly need to access it. Typically, it is optimal to close the databasein the onDestroy() of the calling Activity.

Debug your database

Sqlite Reader

The Android SDK includes a sqlite3 shell tool that allows you to browsetable contents, run SQL commands, and perform other useful functions on SQLitedatabases. For more information, see how to how to issue shell commands.