Sum of a summation in mysql

Posted by dames on Stack Overflow See other posts from Stack Overflow or by dames
Published on 2012-04-13T17:06:38Z Indexed on 2012/04/13 17:28 UTC
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I have the following query, in the top select statement (sum(l.app_ln_amnt)/count(l.app_ln_amnt)) works well but in the union I want to find the total of (sum(l.app_ln_amnt)/count(l.app_ln_amnt)) query from the top select statement However my solution seems to be off I need some help please

select 
(sum(l.app_ln_amnt)/count(l.app_ln_amnt)),


from receipt_history l

     UNION

select 
SUM(sum(l.app_ln_amnt)/count(l.app_ln_amnt)),


from receipt_history l

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