java - How do you search or sort in SQLite Database? -


i have application stores information in database based on information 5 text fields. i'm having trouble being able sort through fields or sorting 1 field. also, method order clause go in? snippets of code database below:

 public static final string mydatabase_name = "my_database";  public static final string mydatabase_table = "my_table";  public static final int mydatabase_version = 1;  public static final string key_content = "content";   public static final string lastname = "lastname";  public static final string firstname = "firstname";  public static final string school = "school";  public static final string email = "email";  public static final string intrest = "intrest";           cursor d = sqlitedatabase.rawquery("select * " + mydatabase_table + "order " + lastname + " asc" , null);               while (d.movetonext()) {                  int sort = d.getcolumnindex(lastname);                  int sort2 = d.getcolumnindex(intrest);                  string lastname = d.getstring(sort);                  string intrest = d.getstring(sort2);                  system.out.println("got student " +  lastname + " likes " + intrest);              }

try use (cursor.getcount() > 0) method , (cursor != null) condition in code check whether gets data or not. have shown below. , try use log query perfection , put query in sqlite database check whether working or not. 

cursor d = sqlitedatabase.rawquery("select * " + mydatabase_table + " order " + lastname + " asc" , null); // here have edited space before order word starts. please note log.d("query",">>>>"+select * " + mydatabase_table + " order " + lastname + " asc"); // check query going right way or not using local database. if(d != null){      if(d.getcount() > 0){  // check 1 or more data         d.movetofirst();              do{                  int sort = d.getcolumnindex(lastname);                  int sort2 = d.getcolumnindex(intrest);                  string lastname = d.getstring(sort);                  string intrest = d.getstring(sort2);                  system.out.println("got student " +  lastname + " likes " + intrest);            } while (d.movetonext());       } }

try this. hope you.


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