How to count equal items from 5 different columns?

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How to count equal items from 5 different columns?

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#1 by (2 votes)

1

I have a table so . The table stores the attendance record ( P ) and faults ( F ). I need to tell, for example, how many presences and how many faults a particular code has.

mysql

asked by anonymous 01.09.2015 / 00:18

1 answer

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score 2 · Answer 1

I would do it as follows:

Table structure.

CREATE TABLE IF NOT EXISTS 'frequencia' (
  'idFrequencia' int(10) NOT NULL AUTO_INCREMENT,
  'idUsuario' int(10) NOT NULL,
  'diaSemana' int(10) NOT NULL,
  'presenca' int(10) NOT NULL,
  PRIMARY KEY ('idFrequencia')
) ENGINE=MyISAM  DEFAULT CHARSET=latin1 AUTO_INCREMENT=6 ;

INSERT INTO 'frequencia' 
('idFrequencia', 'idUsuario', 'diaSemana', 'presenca') 
VALUES
(1, 1, 1, 1),
(2, 1, 2, 1),
(3, 1, 3, 2),
(4, 1, 4, 2),
(5, 1, 5, 1);

And then I would do a SQL:

SELECT count(idFrequencia) as qtdFalta FROM frequencia WHERE idUSuario = '1' GROUP BY presenca = '2';

To get the results. It's an option!