Sql problem

Hi,

The following select does not work, I get ORA-00904 error message that the AgentShare column does not exists.
It would be painful to write down every calculation many times because I can't make a reference to a previous calculated colunm.

Select t.*,t.RowId

, CONTR_ROWS_MG - CONTR_ROWS_GROSS_RECEIVED OutStanding
, CONTRACT_SALESAGENT_PERCENTAGE * CONTR_ROWS_GROSS_RECEIVED / 100 AgentShare
,CONTRACT_SHARE_FIXED OtherShareFixed
,CONTRACT_SHARE_PERCENTAGE * CONTR_ROWS_GROSS_RECEIVED /100
OtherSharePercentage

,AgentShare *2

 From Contract_Rows T,Contract

Where Contract.Contract_Unique = t.contr_rows_contract_unique

Thank you in advance

Zsolt Csillag,
Hungary

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