I have a table with a column containing Effective Dates in DDMMMYYYY format. Expiration Date values don't exist on the table so I need to create my own values for 'Expiration Date'. I need to Select (EFFECTIVE_DATE - 1 as EXPR_DATE) essentially so that if the Effective Date reads 02APR2011 the new field EXPR_DT will show 01APR2011. Can anyone help me please?
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