I've realized that there is a value called "previous transaction hash" which is stored in the "input" column of Bitcoin transaction data. I wonder if it is possible trace the connections among different transactions using this previous transaction hash data.

Hash      Input_count     Ouput_count   ...  Previous_Hash  
123           2               1                 456
456           3               2                 789
1112          1               2                 123

In this example, is it safe to say those three transactions are connected? For example, the first transaction's previous hash is 456, which is equal to the hash value of the second transaction. Also, the first transaction hash value appears to be the "previous hash" of the last transaction. In this case, can I say the three transactions are connected to each other in the following order:

Second Row (456)  -  First Row (123)   - Last Row (1112)

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