Building Complex Select Statments

There are a variety of methods available for building complex select statements.

Selecting only specific columns

  DB::select('column1','column2')->from('table_name');
  SELECT `column1`, `column2` FROM `table_name`

Selecting Column AS

  DB::select(array('column','my_column'))->from('table_name')->compile($db);
  SELECT `column` AS `my_column` FROM `table_name`

join()

  DB::select()->from('table_name')->join('table_2')->on('table_2.table_id', '=', 'table_name.id');
  SELECT * FROM `table_name` JOIN `table_2` ON `table_2`.`table_id` = `table_name`.`id`

group_by()

  DB::select()->from('table_name')->group_by('column');
  SELECT * FROM `table_name` GROUP BY `column`
  DB::select()->from('table_name')->group_by(array('column1', 'mycol'));
  SELECT * FROM `table_name` GROUP BY `column1` AS `mycol`

having()

  DB::select()->from('table_name')->having('column','=','value');
  SELECT * FROM `table_name` HAVING `column` = 'value'

and_having()

  DB::select()->from('table_name')->having('column','=','value')->and_having('column2','=','value');
  SELECT * FROM `table_name` HAVING `column` = 'value' AND `column2` = 'value'

or_having()

  DB::select()->from('table_name')->having('column','=','value')->or_having('column2','=','value');
  SELECT * FROM `table_name` HAVING `column` = 'value' OR `column2` = 'value'

having_open()

  DB::select()->from('table_name')->having_open()->having('column','=','value')
          ->or_having('column2','=','value')->having_close();
  SELECT * FROM `table_name` HAVING (`column` = 'value' OR `column2` = 'value')

and_having_open()

  DB::select()->from('table_name')->where('column','=','value')->and_having_open()->having('column2','=','value')
          ->and_having('column3','=','value')->and_having_close();
  SELECT * FROM `table_name` WHERE `column` = 'value' HAVING (`column2` = 'value' AND `column3` = 'value')

or_having_open()

  DB::select()->from('table_name')->where('column','=','value')->or_having_open()->having('column2','=','value')
          ->or_having('column3','=','value')->or_having_close();
  SELECT * FROM `table_name` WHERE `column` = 'value' HAVING (`column2` = 'value' OR `column3` = 'value')

order_by()

  DB::select()->from('table_name')->order_by('column', 'ASC');
  SELECT * FROM `table_name` ORDER BY `column` ASC

limit()

  DB::select()->from('table_name')->limit(10);
  SELECT * FROM `table_name` LIMIT 10

offset()

  DB::select()->from('table_name')->limit(10)->offset(50);
  SELECT * FROM `table_name` LIMIT 10 OFFSET 50

where()

  DB::select()->from('table_name')->where('column','=','value');
  SELECT * FROM `table_name` WHERE `column` = 'value'

and_where()

  DB::select()->from('table_name')->where('column','=','value')->and_where('column2','=','value');
  SELECT * FROM `table_name` WHERE `column` = 'value' AND `column2` = 'value'

or_where()

  DB::select()->from('table_name')->where('column','=','value')->or_where('column2','=','value');
  SELECT * FROM `table_name` WHERE `column` = 'value' OR `column2` = 'value'

where_open()

  DB::select()->from('table_name')->where_open()->where('column','=','value')
          ->or_where('column2','=','value')->where_close();
  SELECT * FROM `table_name` WHERE (`column` = 'value' OR `column2` = 'value')

and_where_open()

  DB::select()->from('table_name')->where('column','=','value')->and_where_open()->where('column2','=','value')
          ->or_where('column3','=','value')->and_where_close();
  SELECT * FROM `table_name` WHERE `column` = 'value' AND (`column2` = 'value' OR `column3` = 'value')

or_where_open()

  DB::select()->from('table_name')->where('column','=','value')->or_where_open()->where('column2','=','value')
          ->and_where('column3','=','value')->or_where_close();
  SELECT * FROM `table_name` WHERE `column` = 'value' OR (`column2` = 'value' AND `column3` = 'value') 
building_complex_select_statements.txt · Last modified: 2009/10/17 19:23 by kerkness