Permintaan MySQL, hapus semua spasi

Ini cukup dekat. Dengan asumsi:

+-------+---------+------+-----+---------+-------+

| Field | Type    | Null | Key | Default | Extra |
+-------+---------+------+-----+---------+-------+
| d     | text    | YES  |     | NULL    |       |
| id    | int(11) | YES  |     | NULL    |       |
+-------+---------+------+-----+---------+-------+

Lalu kueri ini:

select x.id,x2.id,x.d,x2.d from x left join x as x2 on replace(x.d," ","") = replace(x2.d," ","") and x.id != x2.id having !(x2.id is null);

Memberi Anda baris duplikat. Gagal jika Anda memiliki "Helloworld" (yaitu tanpa spasi) dan Anda tidak ingin itu cocok.