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Unable to delete a row in SQLite database in my app

I need to delete a specific row from table in my SQLite database.
This table contains paths to files.
And I need to delete paths, which contain specific extensions.
And I have troubles with this.
Nothing is deleted from my database.
For example my table name is ALL_PATHS and column name is PATH_NAME
This is the way I am doing this.
I'll be very glad for any help thanks
private void deletePath(String extension){
Database db = getWritableDatabase();
String query = "DELETE FROM " + ALL_PATHS + " WHERE lower(" + PATH_NAME + ") LIKE '%" + extension + "'";
Cursor cursor = db.rawQuery(query, null);
}

The error is:
Cursor cursor = db.rawQuery(query, null);
While it should be
db.execSQL(query);
Because DELETE is a command, not a query (SELECT)

use Content values
String table = "beaconTable";
String whereClause = "_id" + "=?";
String[] whereArgs = new String[] { String.valueOf(row) };
db.delete(table, whereClause, whereArgs);

Android SQLite get all rows where column contains string always returns -1

textAs the title describes I'm trying to get all rows from a table where strings of a column contains a string anywhere in it. But they way I'm doing it now always return -1 rows.
This is how i'm doing it now but I have no idea of what I might be doing wrong. Suggestions?
Cursor cursor = database.query(DBHelper.TABLE_RECENT, null, DBHelper.COLUMN_TEXT+ " LIKE '%"+club_id+"%'", null, null, null, null);

Just write cursor.moveToFirst(); before getting data from cursor or just under query line.
Hope it will help you.

I guess, you're mis interpreting the structure of query. the second parameter is what you want to select. such as "select column1, column2 etc. Here's a line from my code, and it works for me.
Cursor cursor = db.query(table_employees, new String[] {KEY_ID, KEY_NAME,KEY_DEPARTMENT, KEY_PHONE_NUMBER, KEY_SALARY}, KEY_ID + "=?", new String[] { String.valueOf(id) }, null, null, null, null);
here "new string[] {key_id.....", the second parameter, is column names, that you wanted to select.
OR
alternately, you may simply do as:
String query = "Select * from "+DB_TABLE+ "Where" +column1 + "=" + t +"and"+ column2 + "=" +tt
db.rawQuery(query);

if you do something like,
String query = "Select * FROM Product where name LIKE '%" + Text + "%'"
Log.d("search query", query);
Cursor c = db.rawQuery(query, null);
c.moveToFirst();

SQLitedatabase query

I have three columns in my database id ,message and message status and I only want to select only those rows from the list whose message status is 'r' and want to return the cursor from query for only id and message. I am new to databases,Please help.
My current code which is selecting all the rows is:
private String[] allColumns = { MySQLiteHelper.COLUMN_ID,MySQLiteHelper.COLUMN_MESSAGE };
public List<Message> getAllMessages() {
List<Message> message = new ArrayList<Message>();
Cursor cursor = database.query(MySQLiteHelper.TABLE_NAME,allColumns, null, null, null, null, null);
cursor.moveToFirst();
while (!cursor.isAfterLast()) {
Message message1 = cursorToMessage(cursor);
message.add(message1);
cursor.moveToNext();
}
// Make sure to close the cursor
cursor.close();
return message;
}

SQLiteDatabase database = this.getReadableDatabase();
String queryz = "SELECT " + COLUMN_ID + "," + COLUMN_MESSAGE + " FROM " + TABLE_NAME + " WHERE " + COLUMN_MESSAGE_STATUS + "= 'r'";
Cursor c = database.rawQuery(queryz, null);

You need to pass a Where clause yo your query. It is the 4th parameter of the query(). It takes a String, and you should not include the Sqlite3 keyword WHERE (Android does that for you). The clause can be structured like MySQLiteHelper.COLUMN_MESSAGE+"="+"r"

Try this code,
public static final String KEY_ROWID = "row";
public static final String KEY_NAME = "name";
public Cursor fetchNamesByConstraint(String filter) {
Cursor cursor = mDb.query(true, DATABASE_NAMES_TABLE, null, "row LIKE '%" + filter + "%' or name LIKE '%" + filter + "%'",null, null, null, null);
}

how to fetch a row using id sqlite?

This is a simple one! yet, I am missing something. Please help me out.
Here, I am trying to fetch values by id, but not able to do so. It is returning same values even after changing id's value.
db = openOrCreateDatabase("DBSOURCE", 0, null);
Cursor cursorc = db.rawQuery("SELECT * FROM LIST WHERE ID="+id+"", null);
cursorc.moveToFirst();
int NameID = cursorc.getColumnIndex("Name");
int mobilenumberID = cursorc.getColumnIndex("MoblieNumber");
edName.setText(cursorc.getString(NameID));
edMobNum.setText(cursorc.getString(mobilenumberID));
cursorc.close();
db.close();

1-
or better to use parametrized statement
String query = "SELECT COUNT(*) FROM " + tableName + " WHERE columnName = ?";
cursor = db.rawQuery(query, new String[] {comment});
2 - use if with conditon c.moveToFirst() or c.getCount() >0 or (!c.isAfterLast())
if (c.moveToFirst()){
do{
//if you not need the loop you can remove that
id = c.getInt(c.getColumnIndex("_id"));
}
while(cursor.moveToNext());
}c.close();

Is the id column title actually "ID"? Or is that a variable that is set to "_id" (the usual column name for the primary key in an Android database)?
If the latter, your query is not right, because you are using "ID" as the literal column name. Try changing it to this:
Cursor cursorc = db.rawQuery("SELECT * FROM LIST WHERE " + ID + " = " + id, null);
or even this:
Cursor cursorc = db.rawQuery("SELECT * FROM LIST WHERE _id = " + id, null);

try using
Cursor cursorc = db.rawQuery("select * from list where ID = ?", new String[] {id+""});

try with this way
Suppose long id=5;
String[] col=new String[]{KEY_ROWID,KEY_NAME,KEY_ADDRESS}; // your column which data u want to retrive if id is same
Cursor c=db.query(DATABASE_TABLE, col, KEY_ROWID+"="+id,null, null, null, null);
if(c!=null){
c.moveToFirst();
// get data here which u want accroding to ur requirement
}

try this
Cursor cursorc = db.rawQuery("SELECT * FROM LIST WHERE ID='"+id+"'", null);

Why is my getColumnIndex() returning -1?

Ok, so here is my database create statement:
create table entry (
_id integer primary key autoincrement,
date integer not null,
checknum integer,
payee text not null,
amount integer not null,
category text,
memo text,
tag text
);
After the datbase is created, and I make a call like:
mChecknum = cursor.getColumnIndex("checknum");
mChecknum is -1. I have pulled the database from the device and used SQLite Browser on it, and the checknum field is there.
Block around statement in question:
mDbHelper.open();
Cursor cursor = mDbHelper.fetchAll();
startManagingCursor(cursor);
COL_DATE = cursor.getColumnIndex("date");
Log.v("Main:123", "COL_DATE: " + String.valueOf(COL_DATE) );
COL_CHECKNUM = cursor.getColumnIndex("checknum");
Log.v("Main:125", "COL_CHECKNUM: " + String.valueOf(COL_CHECKNUM) );
COL_PAYEE = cursor.getColumnIndex("payee");
COL_DATE returns 1 and COL_PAYEE returns 2. Why is COL_CHECKNUM being ignored/passed over?

In my situation getColumnIndex was returning error on the column which had name which contained the "." symbol i.e.:
int colIndex = cursor.getColumnIndex("Item No.");
and despite the column "Item No." was inside the cursor (the debugger Watch showed it) trying to get the column index failed.

In my fetch/fetchAll database functions, I forgot to update the query with the new column.
For example, before i added the new column, my fetchAll code looked like:
public Cursor fetchAll() {
return mDb.query(DATABASE_TABLE, new String[] {KEY_ROWID, KEY_DATE,
KEY_PAYEE, KEY_AMOUNT, KEY_CATEGORY, KEY_MEMO, KEY_TAG},
null, null, null, null, KEY_DATE + " desc");
}
After adding the new column to the database, my fetchAll function looks like:
public Cursor fetchAll() {
return mDb.query(DATABASE_TABLE, new String[] {KEY_ROWID, KEY_DATE,
KEY_CHECKNUM, KEY_PAYEE, KEY_AMOUNT, KEY_CATEGORY, KEY_MEMO, KEY_TAG},
null, null, null, null, KEY_DATE + " desc");
}