An account alias is an easily recognized name or label representing a general ledger account number. You can view, report, and reserve against an account alias. During a transaction, you can use the account alias instead of an account number to refer to the account
It is Short name for Inter Account code combinations, Alias Max size is 30,
After complete define aliases we should re-compile Chart of accounts
Nav: General ledger --> Setup --> Financials --> Flexfields --> Key --> Alias --> enter

Querry your structure : ( click on F11 and give structure name then click on Ctrl + F11 )
Enable, Enable check box, Enter Max alias size and Prompt name ( T-Alias:)
Give Alias name , Choose account code combination in template field and give alias description
we can give effective date to alias
save it and close
Then go to re - compile structure
Nav : General ledger --> setup --> financials --> flexfields --> key --> segment --> enter
click ctrl + f11 ( to query structure )
Select your structure
Unfreeze structure then again freeze and compile structure
then go to check is alias executing / not
General ledger --> jornals --> enter --> new journal

In lines click on list of values (LOV's)
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