android sqlite query example

Android SQLite Database Tutorial (Select, Insert, Update, Delete) August 10, 2016 Mithilesh Singh Android 39 SQLite is an open-source social database i.e. SQLite is an open-source lightweight relational database management system (RDBMS) to perform database operations, such as storing, updating, retrieving data from the database. Let's see the simple example of android sqlite database. 1.0 Source Code Output. Following is the code snippet to read the data from the SQLite Database using a query() method in the android application. It returns an instance of SQLite database which you have to receive in your own object.Its syntax is given below Apart from this , there are other functions available in the database package , that does this job. Data type integrity is not maintained in SQLite, you can put a value of a certain data type in a column of another datatype (put string in an integer and vice versa). public void delete (String ID) { SQLiteDatabase sqLiteDatabase = this.getWritableDatabase (); //deleting row sqLiteDatabase.delete (TABLE_NAME, "ID=" + ID, null); sqLiteDatabase.close (); } In this tutorial, we will create a simple Notes application using … In the above code, we have taken name and salary as Edit text, when user click on save button it will store the data into sqlite data base and update on listview. 2.0 Create a record in Android SQLite Database 3.0 Count records from Android SQLite Database 4.0 Read records from Android SQLite Database 5.0 Update a record in Android SQLite Database 6.0 Delete a record in Android SQLite Database 7.0 Download Source Code 8.0 What’s Next? The code illustrates how to perform simpleSQLite.NET operations and shows the results in as text in theapplication's main window. This is how we can use the SQLite database to perform CRUD (insert, update, delete and select) operations in android applications to store and retrieve data from the SQLite database based on our requirements. Once we create an application, create a class file DbHandler.java in \java\com.tutlane.sqliteexample path to implement SQLite database related activities for that right-click on your application folder à Go to New à select Java Class and give name as DbHandler.java. This SQLite tutorial is designed for developers who want to use SQLite as the back-end database or to use SQLite to manage structured data in applications including desktop, web, and mobile apps. Following is the example of creating the SQLite database, insert and show the details from the SQLite database into an android listview using the SQLiteOpenHelper class. Read Original Documentation For an example of SQLite queries react-native-sqlite-storage examples of query So here is the complete step by step tutorial for Create SQLite Database-Tables in Android Studio Eclipse example tutorial. In this article, I have attempted to demonstrate the use of SQLite database in Android in the simplest manner possible. If you observe above example, we are saving entered details in SQLite database and redirecting the user to another activity file (DetailsActivity.java) to show the users details and added all the activities in AndroidManifest.xml file. */ public class DetailsActivity extends AppCompatActivity { Intent intent; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.details); DbHandler db = new DbHandler(this); ArrayList> userList = db.GetUsers(); ListView lv = (ListView) findViewById(R.id.user_list); ListAdapter adapter = new SimpleAdapter(DetailsActivity.this, userList, R.layout.list_row,new String[]{"name","designation","location"}, new int[]{R.id.name, R.id.designation, R.id.location}); lv.setAdapter(adapter); Button back = (Button)findViewById(R.id.btnBack); back.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { intent = new Intent(DetailsActivity.this,MainActivity.class); startActivity(intent); } }); } }. The package android.database.sqlite contains all the required APIs to use an SQLite database in our android applications. Now open activity_main.xml file from \res\layout folder path and write the code like as shown below. To know more about SQLite, check this SQLite Tutorial with Examples. Tutlane 2020 | Terms and Conditions | Privacy Policy, //Create a new map of values, where column names are the keys, // Insert the new row, returning the primary key value of the new row. How to use sqlite_version () in Android sqlite? The SQLite SELECT statement provides all features of the SELECT statement in SQL standard.. In this tutorial we will going to learn about some basic fundamentals of SQLite database and execute query on a already created DB. Things to consider when dealing with SQLite: 1. Android default Database engine is Lite. I assume you have connected your actual Android Mobile device with your computer. SQLite is an open-source relational database that is used to perform database operations on Android devices such as storing, manipulating or retrieving persistent data from the database.. By default SQLite database is embedded in android. We would also insert data into SQLite database using EditText and store entered values into database tables. In order to create a database you just need to call this method openOrCreateDatabase with your database name and mode as a parameter. ... We have used a query variable which uses SQL query to fetch all rows from the table. Querying the data You'l… used to perform database operations on android gadgets, for example, putting away, controlling or … Hello, geeks. This Android SQLite tutorial will cover the simple operation of SQLite databases like insert and display data. //Get the Data Repository in write mode. You can use the SELECT statement to perform a simple calculation as follows: This Android SQLite tutorial will cover two examples. Saving data to a database is ideal for repeating or structured data, such as contact information. Following is the code snippet to update the data in the SQLite database using an update () method in the android application. SQLite is a structure query base database, hence we can say it’s a relation database. If you observe above code, we are getting the details from SQLite database and binding the details to android listview. Let’s start creating xml layout for sign up and sign in. ",new String[]{String.valueOf(userid)},null, null, null, null); if (cursor.moveToNext()){ HashMap user = new HashMap<>(); user.put("name",cursor.getString(cursor.getColumnIndex(KEY_NAME))); user.put("designation",cursor.getString(cursor.getColumnIndex(KEY_DESG))); user.put("location",cursor.getString(cursor.getColumnIndex(KEY_LOC))); userList.add(user); } return userList; } // Delete User Details public void DeleteUser(int userid){ SQLiteDatabase db = this.getWritableDatabase(); db.delete(TABLE_Users, KEY_ID+" = ? Android provides different ways to store data locally so using SQLite is one the way to store data. Now we will create another layout resource file details.xml in \res\layout path to show the details in custom listview from SQLite Database for that right click on your layout folder à Go to New à select Layout Resource File and give name as details.xml. Following is the code snippet of creating the database and tables using the SQLiteOpenHelper class in our android application. Now we need to add this newly created activity in AndroidManifest.xml file in like as shown below. android.database.sqlite.SQLiteOpenHelper; // **** CRUD (Create, Read, Update, Delete) Operations ***** //, insertUserDetails(String name, String location, String designation){, ArrayList> GetUsers(){, "SELECT name, location, designation FROM ", ArrayList> GetUserByUserId(. Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project. public class DbHandler extends SQLiteOpenHelper { private static final int DB_VERSION = 1; private static final String DB_NAME = "usersdb"; private static final String TABLE_Users = "userdetails"; private static final String KEY_ID = "id"; private static final String KEY_NAME = "name"; private static final String KEY_LOC = "location"; private static final String KEY_DESG = "designation"; public DbHandler(Context context){ super(context,DB_NAME, null, DB_VERSION); } @Override public void onCreate(SQLiteDatabase db){ String CREATE_TABLE = "CREATE TABLE " + TABLE_Users + "(" + KEY_ID + " INTEGER PRIMARY KEY AUTOINCREMENT," + KEY_NAME + " TEXT," + KEY_LOC + " TEXT," + KEY_DESG + " TEXT"+ ")"; db.execSQL(CREATE_TABLE); } @Override public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion){ // Drop older table if exist db.execSQL("DROP TABLE IF EXISTS " + TABLE_Users); // Create tables again onCreate(db); } }. This article contains example about how to create SQLite database, how to create table and how to insert, update, delete, query SQLite table. Select your mobile device as an option and then check your mobile device which will display your default screen –, Now enter some values in edit text and click on save button as shown below –, To verify the above result click on refresh button to update list view as shown below –. Create a new android application using android studio and give names as SQLiteExample.

. When you want to store the data in an effective manner and are useful to show to the user later, you should use SQLite for quick insertion and fetch of the data. If you observe above code, we are deleting the details using delete() method based on our requirements. columns A list of which columns to return. Contents in this project Android SQLite Store Data Into DB from EditText. SQLiteDatabase 3.4. rawQuery() Example 3.5. query() Example 3.6. Now we will see how to create sqlite database and perform CRUD (insert, update, delete, select) operations on SQLite Database in android application with examples. SELECT col-1, col-2 FROM tableName WHERE col-1=apple,col-2=mango GROUPBY col-3 HAVING Count(col-4) > 5 ORDERBY col-2 DESC LIMIT 15; Then for query() method, we can do as:-String table = "tableName"; String[] columns = … package com.example.sqliteoperations; import android.content.ContentValues; import android.content.Context; import android.database.Cursor; import android.database.sqlite.SQLiteDatabase; import android.database.sqlite.SQLiteOpenHelper; public class myDbAdapter { myDbHelper myhelper; public myDbAdapter(Context context) { myhelper = new … You can use WHERE clause with UPDATE query to update selected rows. android.support.v7.app.AppCompatActivity; Android Create Database & Tables in SQLite Database, Android CRUD (Insert Read Update Delete) Operations in SQLite Database, Android SQLite Database Example with Output. After that, if we click on the Back button, it will redirect the user to the login page. */ public class DbHandler extends SQLiteOpenHelper { private static final int DB_VERSION = 1; private static final String DB_NAME = "usersdb"; private static final String TABLE_Users = "userdetails"; private static final String KEY_ID = "id"; private static final String KEY_NAME = "name"; private static final String KEY_LOC = "location"; private static final String KEY_DESG = "designation"; public DbHandler(Context context){ super(context,DB_NAME, null, DB_VERSION); } @Override public void onCreate(SQLiteDatabase db){ String CREATE_TABLE = "CREATE TABLE " + TABLE_Users + "(" + KEY_ID + " INTEGER PRIMARY KEY AUTOINCREMENT," + KEY_NAME + " TEXT," + KEY_LOC + " TEXT," + KEY_DESG + " TEXT"+ ")"; db.execSQL(CREATE_TABLE); } @Override public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion){ // Drop older table if exist db.execSQL("DROP TABLE IF EXISTS " + TABLE_Users); // Create tables again onCreate(db); } // **** CRUD (Create, Read, Update, Delete) Operations ***** // // Adding new User Details void insertUserDetails(String name, String location, String designation){ //Get the Data Repository in write mode SQLiteDatabase db = this.getWritableDatabase(); //Create a new map of values, where column names are the keys ContentValues cValues = new ContentValues(); cValues.put(KEY_NAME, name); cValues.put(KEY_LOC, location); cValues.put(KEY_DESG, designation); // Insert the new row, returning the primary key value of the new row long newRowId = db.insert(TABLE_Users,null, cValues); db.close(); } // Get User Details public ArrayList> GetUsers(){ SQLiteDatabase db = this.getWritableDatabase(); ArrayList> userList = new ArrayList<>(); String query = "SELECT name, location, designation FROM "+ TABLE_Users; Cursor cursor = db.rawQuery(query,null); while (cursor.moveToNext()){ HashMap user = new HashMap<>(); user.put("name",cursor.getString(cursor.getColumnIndex(KEY_NAME))); user.put("designation",cursor.getString(cursor.getColumnIndex(KEY_DESG))); user.put("location",cursor.getString(cursor.getColumnIndex(KEY_LOC))); userList.add(user); } return userList; } // Get User Details based on userid public ArrayList> GetUserByUserId(int userid){ SQLiteDatabase db = this.getWritableDatabase(); ArrayList> userList = new ArrayList<>(); String query = "SELECT name, location, designation FROM "+ TABLE_Users; Cursor cursor = db.query(TABLE_Users, new String[]{KEY_NAME, KEY_LOC, KEY_DESG}, KEY_ID+ "=? 9.0 Notes. To use SQLiteOpenHelper, we need to create a subclass that overrides the onCreate() and onUpgrade() call-back methods. Simple uses of SELECT statement. SQLite with multiple tables in Android example guides you to create multiple tables with simple source code. Step 2 − Add the following code to res/layout/activity_main.xml. Android SQLite resources SQlite website SQL Tutorial SQLiteManager Eclipse Plug-in 14.3. int _id; String _name; String _phone_number; public Contact () { } public Contact (int id, String name, String _phone_number) {. As explained above signup has … When you click the … Android SQLite CRUD Operations Examples … SQLite UPDATE Query is used to modifying the existing records in a table. SQLiteDatabase db = this.getWritableDatabase (); ContentValues cVals = new ContentValues (); cVals.put (KEY_LOC, location); If you observe above code, we implemented all SQLite Database related activities to perform CRUD operations in android application. SQLite supports all the relational database features.