Mysql 将SQL查询转换为Codeigniter

有人能帮我把这个SQL查询转换成codeigniter吗

"SELECT *,
       (select nama_opd from c1db_pegawai.m_opd aopd where p.jabatan_lama_opd = aopd.id) lm_jabatan_lama_opd,
       (select nama_opd from c1db_pegawai.m_opd bopd where p.jabatan_baru_opd = bopd.id) br_jabatan_baru_opd,
       (select unit_kerja from c1db_pegawai.m_unit_kerja aunit where p.jabatan_lama_unit = aunit.id) lm_jabatan_lama_unit,
       (select unit_kerja from c1db_pegawai.m_unit_kerja bunit where p.jabatan_baru_unit = bunit.id) br_jabatan_baru_unit
       from sk_mutasi p;

---

使用查询生成器，您只需将这些选择分组即可

$this->db->select('*')
    ->group_start()
        ->select('(SELECT nama_opd FROM c1db_pegawai.m_opd aopd WHERE p.jabatan_lama_opd = aopd.id) AS lm_jabatan_lama_opd')
    ->group_end()
    ->group_start()
        ->select('(SELECT nama_opd from c1db_pegawai.m_opd bopd WHERE p.jabatan_baru_opd = bopd.id) AS br_jabatan_baru_opd')
    ->group_end()
    ->group_start()
        ->select('(SELECT unit_kerja from c1db_pegawai.m_unit_kerja aunit where p.jabatan_lama_unit = aunit.id) AS lm_jabatan_lama_unit')
    ->group_end()
    ->group_start()
        ->select('(SELECT unit_kerja from c1db_pegawai.m_unit_kerja bunit where p.jabatan_baru_unit = bunit.id) AS br_jabatan_baru_unit')
    ->group_end()
    ->from('sk_mutasi p')
    ->get()
    ->result();

您甚至可以深入到另一个层次，只需使用查询生成器来创建这些子选择

或者，您可以在查询语句中使用整个查询，如下所示：

$this->db->query('SELECT *,
       (select nama_opd from c1db_pegawai.m_opd aopd where p.jabatan_lama_opd = aopd.id) lm_jabatan_lama_opd,
       (select nama_opd from c1db_pegawai.m_opd bopd where p.jabatan_baru_opd = bopd.id) br_jabatan_baru_opd,
       (select unit_kerja from c1db_pegawai.m_unit_kerja aunit where p.jabatan_lama_unit = aunit.id) lm_jabatan_lama_unit,
       (select unit_kerja from c1db_pegawai.m_unit_kerja bunit where p.jabatan_baru_unit = bunit.id) br_jabatan_baru_unit
       from sk_mutasi p')
->result();

---

我想指出的是，这可能不是一个好的查询，您可能只需要通过连接从这些额外的表中获取信息就可以获得更好的结果。

正如marcogmonteiro已经指出的那样，您确实需要在这里使用连接

试试下面的方法

$query = $this->db
    ->select('p.*, aopd.nama_opd AS lm_jabatan_lama_opd, bopd.nama_opd AS br_jabatan_baru_opd, aunit.unit_kerja AS lm_jabatan_lama_unit, bunit.unit_kerja AS br_jabatan_baru_unit')
    ->from('sk_mutasi p')
    ->join('c1db_pegawai.m_opd aopd', 'p.jabatan_lama_opd = aopd.id', 'left')
    ->join('c1db_pegawai.m_opd bopd', 'p.jabatan_baru_opd = bopd.id', 'left')
    ->join('c1db_pegawai.m_unit_kerja aunit', 'p.jabatan_lama_unit = aunit.id', 'left')
    ->join('c1db_pegawai.m_unit_kerja bunit', 'p.jabatan_baru_unit = bunit.id', 'left')
    ->get();

---

你的意思是只使用查询生成器创建这个查询？是的，我需要知道如何放入查询生成器，这是如此完美地工作