Android SQLite ContentValues put() method parameters

I just got started with learning Android's SQLite. So I'm trying to inspect each of the methods and classes used. ``` public static final String DB_NAME = "myDB"; public static final String DB_TABLE = "myTable"; public static final int DB_VERSION = 1; public static final String LNAME = "LNAME"; public static final String FNAME = "FNAME"; public static final String GENDER = "GENDER"; public static final String COURSE = "COURSE"; public class DBHelper extends SQLiteOpenHelper{ public DBHelper (Context aContext){ super(aContext,DB_NAME,null,DB_VERSION); } @Override public void onCreate(SQLiteDatabase sqLiteDatabase) { sqLiteDatabase.execSQL("CREATE TABLE " + DB_TABLE + " (ID INTEGER PRIMARY KEY AUTOINCREMENT, LNAME TEXT, FNAME TEXT, GENDER TEXT, COURSE TEXT) " ); } @Override public void onUpgrade(SQLiteDatabase sqLiteDatabase, int i, int i1) { sqLiteDatabase.execSQL( "DROP TABLE IF EXIST " + DB_NAME ); } } public long Employee(String aLastName, String aFirstName, String aGender, String aCourse ){ open(); //opens the database ContentValues cv = new ContentValues(); //creates instance of ContentValues class to store values cv.put(LNAME,aLastName); // put(key,value) method is used to assign the parameters to its destination column in the database cv.put(FNAME,aFirstName); //put(key,value) cv.put(GENDER,aGender); cv.put(COURSE,aCourse); return myDatabase.insert(DB_TABLE,null,cv); } ``` Does `key` in `put(key,value)` have to match the exact column name in the database? From what I read the `ContentValues` class is used to store data to the database. I'd appreciate any explanation. Thanks.