<engaging teaching mode>
If the DB needs to scan the entire table to find a row, what does that
tell you?
:-)
On 2013-10-29 09:17, TrendTimer.com wrote:
Explain Analyze update tre_combinedtestday set
compoundpercent=-13.373487168551002, totalpercent=-5.466540999057416,
dollaramount=0.9453345900094259 where id=230827
returns this:
UPDATE PUBLIC.TRE_COMBINEDTESTDAY
/* PUBLIC.TRE_COMBINEDTESTDAY.tableScan */
/* scanCount: 74005 */
SET
COMPOUNDPERCENT = -13.373487168551002,
TOTALPERCENT = -5.466540999057416,
DOLLARAMOUNT = 0.9453345900094259
WHERE ID = 230827
/*
total: 5087
TRE_COMBINEDTESTDAY.TRE_COMBINEDTESTDAY_DATA read: 5087 (100%)
*/
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