March 2007
Intermediate to advanced
488 pages
13h 46m
English
book
OnDemand SQL Performance Analysis Simplified on DB2 for i5/OS in V5R4
by Hernando Bedoya, Jaime Gaug, James Kerl, Ser Ser NG, Jose Cardoso dos Santos
Content preview from OnDemand SQL Performance Analysis Simplified on DB2 for i5/OS in V5R4
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Chapter 6. Custom Database Monitor Analysis 185
SELECT qqstim as "Start timestamp" ,qqetim as "End timestamp",
DECIMAL((DAY(qqetim-qqstim)*24*3600)+
(HOUR(qqetim-qqstim)*3600)+(MINUTE(qqetim-qqstim)*60)+
(SECOND(qqetim-qqstim))+(MICROSECOND(qqetim-qqstim)*.000001),18,3) AS "Temp.
population time" ,qqrcod as "Reason" ,qqtmpr as "Rows in temp" ,qqsttx as "SQL
text"
FROM xx a LEFT JOIN yy b ON a.qqjfld = b.qqjfld AND a.qqucnt = b.qqucnt
ORDER BY "Temp. population time" DESC;
Figure 6-6 shows the result of the query in Example 6-5. The information from the 3004
record is joined with information from the 1000 record so we know which queries were ...
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