android sqlite query example

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Before getting into example, we should know what sqlite data base in android is. Android SQLite Database Tutorial. Inserting new Record into Android SQLite database table. When you click the … Android SQLite CRUD Operations Examples … Contents in this project Android SQLite Store Data Into DB from EditText. Android SQLITE query selection example table The table name to compile the query against. Android SQLite CRUD Example. In android, we have different storage options such as shared preferences, internal storage, external storage, SQLite storage, etc. We would also insert data into SQLite database using EditText and store entered values into database tables. 2. used to perform database operations on android gadgets, for example, putting away, controlling or … This Android SQLite Database tutorial will focus on data persistence in Android using SQLite and will not provide a thorough introduction to Android development concepts. Go to Solution Explorer-> Project Name-> References. The following code snippet shows how to insert a new record in the android SQLite database. Querying the data You'l… You can use the SELECT statement to perform a simple calculation as follows: package example.javatpoint.com.sqlitetutorial; public class Contact {. Step 2 − Add the following code to res/layout/activity_main.xml. In case if you are not aware of creating an app in android studio check this article Android Hello World App. Let’s start creating xml layout for sign up and sign in. Now we will create another activity file DetailsActivity.java in \java\com.tutlane.sqliteexample path to show the details from the SQLite database for that right-click on your application folder à Go to New à select Java Class and give name as DetailsActivity.java. Step 1) So just open your Android studio, we are going to start a new Android Application and we will name our application as SQLite app for example and then click next or select you minimum sdk. columns A list of which columns to return. Saving data to a database is ideal for repeating or structured data, such as contact information. SQLiteDatabase db = this.getWritableDatabase (); ContentValues cVals = new ContentValues (); cVals.put (KEY_LOC, location); File: Contact.java. In order to create a database you just need to call this method openOrCreateDatabase with your database name and mode as a parameter. As explained above signup has … Following is the code snippet to update the data in the SQLite database using an update () method in the android application. In android, we can read the data from the SQLite database using the query() method in android applications. Things to consider when dealing with SQLite: 1. In android, we can delete data from the SQLite database using the delete() method in android applications. Click next and select a blank activity next, and leave main activity as default and click finish. Referential integrity is not maintained in SQ… */ 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+ "=? Once completed, the application will consist of an activity and a database handler class. If you observe above code, we are deleting the details using delete() method based on our requirements. In this Android tutorial we will be integrating SQLite database in your apps. Source Code Source Code of Examples 14.2. 1. 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);     } }. There are six button in the screen. 9.0 Notes. But that covered the scenario, only when you have one table in the database. This page assumes that you are familiar with SQL databases in general and helps you get started with SQLite databases on Android. 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. Android comes in with built in SQLite database implementation. This example demonstrate about How to use SELECT Query in Android sqlite. Android The following code sample shows an entire database interaction usingthe SQLite.NET library to encapsulate the underlying database access.It shows: 1. This example demonstrate about How to use SELECT Query in Android sqlite. This article assumes that the user has a working knowledge of Android and basic SQL commands. In this tutorial we will going to learn about some basic fundamentals of SQLite database and execute query on a already created DB. If you observe above code, we are getting the details from SQLite database and binding the details to android listview. When we run the above example in the android emulator we will get a result as shown below. 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 … Watch the application demo video. Now we will see how to perform CRUD (create, read, delete and update) operations in android applications. The first example is simple and is for beginners. Android SQLite Database Tutorial (Select, Insert, Update, Delete) August 10, 2016 Mithilesh Singh Android 39 SQLite is an open-source social database i.e. 1.0 Source Code Output. ListViews, ListActivities and SimpleCursorAdapter 4. The package android.database.sqlite contains all the required APIs to use an SQLite database in our android applications. Simple uses of SELECT statement. SQLiteDatabase 3.4. rawQuery() Example 3.5. query() Example 3.6. This method is called only once throughout the application after the database is created and the table creation statements can be written in this method. 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. Examples Of Query You will learn Basic CRUD operation on SQLite and Joins Query. By default, Android comes with built-in SQLite Database support so we don’t need to do any configurations. SQLite is an opensource SQL database that stores data to a text file on a device. SQLite UPDATE Query is used to modifying the existing records in a table. 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. Then, right-click to … 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. Below are the screenshots of the app. if your SQL query is like this. int _id; String _name; String _phone_number; public Contact () { } public Contact (int id, String name, String _phone_number) {. UpdateUserDetails(String location, String designation, "http://schemas.android.com/apk/res/android". SQLite is an open-source relational database. How to use sqlite_source_id () in Android sqlite? If you observe above code, we are getting the data repository in write mode and adding required values to columns and inserting into database.                                                                                         . Android default Database engine is Lite. This article contains example about how to create SQLite database, how to create table and how to insert, update, delete, query SQLite table. Creating the Data Model. If you observe above code snippet, we are creating database “usersdb” and table “userdetails” using SQLiteOpenHelper class by overriding onCreate and onUpgrade methods. public void insert(String name, String desc) { ContentValues contentValue = new ContentValues (); contentValue.put (DatabaseHelper.SUBJECT, name); contentValue.put (DatabaseHelper.DESC, desc); database.insert (DatabaseHelper.TABLE_NAME, null, contentValue); } This method is called whenever there is an updation in the database like modifying the table structure, adding constraints to the database, etc. Step 3 − Add the following code to src/MainActivity.java, Step 4 − Add the following code to src/ DatabaseHelper.java, Let's try to run your application. They are listed below Also most of the examples assume a deep knowledge of Android and SQL. Now we need to add this newly created activity in AndroidManifest.xml file in like as shown below. So, there is no need to perform any database setup or administration task. Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill … to store and retrieve the application data based on our requirements. If you observe above code, we are taking entered user details and inserting into SQLite database and redirecting the user to another activity. 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 … If you observe above code, we are getting the details from required table using query() method based on our requirements. SQLite supports all the relational database features. 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 –. */ 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);             }         });     } }. So here is the complete step by step tutorial for Create SQLite Database-Tables in Android Studio Eclipse example tutorial. After that, if we click on the Back button, it will redirect the user to the login page. ... We have used a query variable which uses SQL query to fetch all rows from the table. Now we will see how to create a database and required tables in SQLite and perform CRUD (insert, update, delete and select) operations in android applications. sqlite> SELECT sql FROM sqlite_master WHERE type = 'table' AND tbl_name = 'COMPANY'; Assuming you have only COMPANY table in your testDB.db, this will produce the following result. Activity Layout. Kotlin Android SQLite Tutorial. The second one is regarding Android CRUD (create, read, update, and delete) operations in the SQLite Database. You can use WHERE clause with UPDATE query to update selected rows. SQLite is a structure query base database, hence we can say it’s a relation database. ",new String[]{String.valueOf(id)});         return  count;     } }. 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(. 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. We are going to create a simple Notes App with SQLite as database storage. You can read article Android SQLite Database Introduction for general SQLite concepts. SQLite is an open-source, zero-configuration, self-contained, stand-alone, transaction relational database engine designed to be embedded into an application.             , Now open your main activity file MainActivity.java from \java\com.tutlane.sqliteexample path and write the code like as shown below, package com.tutlane.sqliteexample; import android.content.Intent; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.Toast; public class MainActivity extends AppCompatActivity {     EditText name, loc, desig;     Button saveBtn;     Intent intent;     @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_main);         name = (EditText)findViewById(R.id.txtName);         loc = (EditText)findViewById(R.id.txtLocation);         desig = (EditText)findViewById(R.id.txtDesignation);         saveBtn = (Button)findViewById(R.id.btnSave);         saveBtn.setOnClickListener(new View.OnClickListener() {             @Override             public void onClick(View v) {                 String username = name.getText().toString()+"\n";                 String location = loc.getText().toString();                 String designation = desig.getText().toString();                 DbHandler dbHandler = new DbHandler(MainActivity.this);                 dbHandler.insertUserDetails(username,location,designation);                 intent = new Intent(MainActivity.this,DetailsActivity.class);                 startActivity(intent);                 Toast.makeText(getApplicationContext(), "Details Inserted Successfully",Toast.LENGTH_SHORT).show();             }         });     } }. BaseColumns; CalendarContract.AttendeesColumns; CalendarContract.CalendarAlertsColumns; CalendarContract.CalendarCacheColumns; CalendarContract.CalendarColumns Create an another layout file (list_row.xml) in /res/layout folder to show the data in listview, for that right click on layout folder à add new Layout resource file à Give name as list_row.xml and write the code like as shown below. 1.1 Create SQLite Database Example. Just like we save the files on the device’s internal storage, Android stores our database in a private disk space that’s associated with our application and the data is secure, because by default this area is not accessible to other applications. Summary: in this tutorial, you will learn how to use SQLite SELECT statement to query data from a single table.. 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 = … Following is the code snippet to read the data from the SQLite Database using a query() method in the android application. SQLite database works same as MySQL database and also gives us the facility to create tables and help us to perform all types of table related certain tasks like Add records, Edit records, delete records, update records. This Android SQLite tutorial will cover two examples. SQLite is an open-source lightweight relational database management system (RDBMS) to perform database operations, such as storing, updating, retrieving data from the database. To know more about SQLite, check this SQLite Tutorial with Examples. 1.