my situation is like this ..
i have 15 lac recors in my table..
the following query takes nine seconds to give the required output..
Code:
SELECT max(ah.AUC_AMT),
SUBSTRING_INDEX(GROUP_CONCAT(SUBSTRING_INDEX(ah.AUC_CUS_NAME,'@',1) order by AUC_AMT DESC SEPARATOR '|_|'),'|_|',3),
timediff(av.AUC_END_TIM,time(now())) as RemTime,
av.AUC_END_TIM,av.AUC_RSV_PRC,av.AUC_DATE,av.AUC_STATUS
from auc_hist_tbl as ah, aucveh_sched_tbl as av
where ah.AUC_UNI_NO = ''
AND av.AUC_UNI_NO = ''
auc_hist_tbl has 15 lac records ... i have indexed AUC_UNI_NO ..
but still its taking time ..
can u guide where's my query going wrong..
thanks ..
Last edited by Scott; 02-12-2011 at 04:58 AM..
Reason: Code tags, PLEASE...
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hi..
i need to optimize my select query ..
my situation is like this ..
i have 15 lac recors in my table..
the following query takes nine seconds to give the required output..
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SUBSTRING_INDEX(GROUP_CONCAT(SUBSTRING_INDEX(ah.AUC_CUS_NAME,'@',1) order by AUC_AMT... (0 Replies)
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