java - How do I within SQLite, return a row based on 3 values rather than just one? (Already done code for 1) -

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within sqlite, can search table particular row contains 1 values instance player name want return row based on 3 values instance player name, team name , favorite color etc.

how alter below code this?

code searching based upon 1 value below:

public backupdatastore getentry(string value, string columnname) {      sqlitedatabase db = this.getreadabledatabase();      cursor cursor = db.query(table_name,                      new string[] { key_id,                                          key_team_name,                                   key_ref_name,                                   key_date,                                   key_player_1,                                  key_player_2,                                  key_player_3,                                  key_player_4,                                  key_player_5,                                  key_player_6,                                  key_player_7 ,                                  key_player_8},                     columnname + "=?",                             new string[] { value }, null, null, null, null);     if (cursor != null) {         boolean move = cursor.movetofirst();     //false value means query returned 0 results     if(!move)      {     return backupdatastore.kemptydata;      } }      backupdatastore entry = new backupdatastore(integer.parseint(cursor.getstring(0)), cursor.getstring(1), cursor.getstring(2), cursor.getstring(3), cursor.getstring(4), cursor.getstring(5), cursor.getstring(6), cursor.getstring(7), cursor.getstring(8),  cursor.getstring(9), cursor.getstring(10), cursor.getstring(11));     // return entry     return entry; }

you need change you're passing 3rd , 4th parameters - column names , values passed clause.

for example, filter across 3 columns you'd do:

cursor cursor = db.query(table_name,                  new string[] { key_id,                                      key_team_name,                               key_ref_name,                               key_date,                               key_player_1,                              key_player_2,                              key_player_3,                              key_player_4,                              key_player_5,                              key_player_6,                              key_player_7 ,                              key_player_8},                 column1name + "=? , " +                 column2name + "=? , " +                 column3name + "=? ",                         new string[] { value1, value2, value3 }, null, null, null, null);

this build expression similar select player1, player2, ... teamname firstname = 'x' , lastname = 'y' , teamname = 'z'

you build dynamically using variable length args, or passing in string arrays, rather method defined take 3 columns & 3 values parameters, example:

public backupdatastore getentry(string[] values, string[] columns) {     if (values.length != columns.length) {         throw new illegalargumentexception("number of columns not match number of values provided.");     }     stringbuilder sb = new stringbuilder();     (int = 0; < columns.length; i++) {         sb.append(columns[i]);         sb.append("=?");         if (i != columns.length - 1) {             sb.append(" , ");         }     }     string wherecolumns = sb.tostring();      cursor cursor = db.query(table_name,                  new string[] { key_id,                                      key_team_name,                               key_ref_name,                               key_date,                               key_player_1,                              key_player_2,                              key_player_3,                              key_player_4,                              key_player_5,                              key_player_6,                              key_player_7 ,                              key_player_8},                 wherecolumns,                 values, null, null, null, null);     ...

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