Hello everybody.
Help me please,
My table consists of one big key = some subkeys(key1,key2, ..),id and some other information.
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|id|key1|key2|key3|key4|info|...
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| 1| k1 | k2 | k3 | k4 | |
| 2| k1 | k2 | k5 | k4 |
......
I...