我有一个表,我定义了一列,以接收零0值。我这样做是因为零0代表所有值。表的名字是agendas
,它的列是turmas_id
,这一列与表turmas
有关系,但turmas_id
在agendas
它不是一个外键,因为我可以加0前面说的那样。如何使用包含属性值零的表进行联接?
问题是,当我使用这些表进行JOIN连接时,因为我需要返回所有带有零值的属性,并在表turmas
中添加了有效的键。
我试过使用LEFT JOIN和INNER JOIN,但结果并不是我在等待。如果id
存在于表turmas
和表agendas
中,我可以使用JOIN,因为它是一个有效的外键,但我无法返回agendas
属性turmas_id
中的其他值,这正是我所需要的。
我该怎么做?
我需要显示此结果
//table agendas
-----------------------------------------
turmas_id | descricao
-----------------------------------------
0 | this attribute contain zero and it's not exists in table turmas
16 | table turmas contain id 16 it is a foreign key
0 | this attribute contain zero and it's not exists in table turmas
23 | table turmas contain id 23 it is a foreign key
SQL
$agendamentos = $this->Agenda->query("SELECT * FROM responsavel_alunos RespAlunos "
. "INNER JOIN pessoas Responsavel ON (Responsavel.id = RespAlunos.pessoas_id) "
. "INNER JOIN pessoas Aluno ON (Aluno.id = RespAlunos.pessoas_id1) "
. "INNER JOIN matriculas Matricula ON (Matricula.pessoas_id = Aluno.id) "
. "RIGHT JOIN turmas Turma ON (Turma.id = Matricula.turmas_id OR Turma.id = 0) "
. "INNER JOIN escolas Escola ON (Escola.id = Matricula.escolas_id) "
. "INNER JOIN agendas Agenda ON (Agenda.turmas_id = Turma.id) "
. "WHERE Responsavel.id = ? ORDER BY Agenda.created DESC "
, array($id)); //id do responsavel
型号
JSON结果
{
"status": "1",
"result": [
{
"RespAlunos": {
"id": "5",
"pessoas_id": "8",
"pessoas_id1": "9",
"created": "2015-09-21 10:25:46",
"modified": "2015-09-21 10:25:46"
},
"Responsavel": {
"id": "8",
"nome": "responsavel ",
"email": "responsavel @hotmail.com",
"tipopessoas_id": "3",
"status": "1",
"created": "2015-09-21 10:17:17",
"modified": "2015-09-21 10:17:17"
},
"Aluno": {
"id": "9",
"nome": "aluno",
"email": "[email protected]",
"tipopessoas_id": "1",
"status": "1",
"created": "2015-09-21 10:18:41",
"modified": "2015-09-21 10:18:41"
},
"Matricula": {
"id": "6",
"referencia": "238",
"pessoas_id": "9",
"turmas_id": "4",
"escolas_id": "2",
"status": "1",
"created": "2015-09-21 10:35:08",
"modified": "2016-02-18 10:51:20"
},
"Turma": {
"id": "4",
"descricao": "4º ano",
"created": "2015-09-21 10:31:32",
"modified": "2015-09-21 10:31:32"
},
"Escola": {
"id": "2",
"descricao": "Santa Luz Unidade 2",
"created": "2015-09-17 23:09:38",
"modified": "2015-09-17 23:09:38"
},
"Agenda": {
"id": "34",
"data": "2016-02-29 14:40:00",
"descricao": "<p>teste 1</p>\r\n",
"escolas_id": "2",
"turmas_id": "4",
"created": "2016-02-29 14:40:21",
"modified": "2016-02-29 14:40:21"
}
},
{
"RespAlunos": {
"id": "5",
"pessoas_id": "8",
"pessoas_id1": "9",
"created": "2015-09-21 10:25:46",
"modified": "2015-09-21 10:25:46"
},
"Responsavel": {
"id": "8",
"nome": "responsavel ",
"email": "responsavel @hotmail.com",
"tipopessoas_id": "3",
"status": "1",
"created": "2015-09-21 10:17:17",
"modified": "2015-09-21 10:17:17"
},
"Aluno": {
"id": "9",
"nome": "aluno",
"email": "[email protected]",
"tipopessoas_id": "1",
"status": "1",
"created": "2015-09-21 10:18:41",
"modified": "2015-09-21 10:18:41"
},
"Matricula": {
"id": "6",
"referencia": "238",
"pessoas_id": "9",
"turmas_id": "4",
"escolas_id": "2",
"status": "1",
"created": "2015-09-21 10:35:08",
"modified": "2016-02-18 10:51:20"
},
"Turma": {
"id": "4",
"descricao": "4º ano",
"created": "2015-09-21 10:31:32",
"modified": "2015-09-21 10:31:32"
},
"Escola": {
"id": "2",
"descricao": "Santa Luz Unidade 2",
"created": "2015-09-17 23:09:38",
"modified": "2015-09-17 23:09:38"
},
"Agenda": {
"id": "27",
"data": "2016-02-29 08:24:00",
"descricao": "descricao",
"escolas_id": "2",
"turmas_id": "4",
"created": "2016-02-29 08:25:20",
"modified": "2016-02-29 08:25:20"
}
}
]
}
我该怎么办? – FernandoPaiva