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<TITLE>MySQLs EXPLAIN PLAN</TITLE>
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<H1>MySQLs EXPLAIN PLAN</H1>
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<LI><H2>To generate a plan:
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EXPLAIN SELECT tt.TicketNumber, tt.TimeIn,
<BR><BR> tt.ProjectReference, tt.EstimatedShipDate,
<BR> tt.ActualShipDate, tt.ClientID,
<BR> tt.ServiceCodes, tt.RepetitiveID,
<BR> tt.CurrentProcess, tt.CurrentDPPerson,
<BR> tt.RecordVolume, tt.DPPrinted, et.COUNTRY,
<BR> et_1.COUNTRY, do.CUSTNAME
<BR> FROM tt, et, et AS et_1, do
<BR> WHERE tt.SubmitTime IS NULL
<BR> AND tt.ActualPC = et.EMPLOYID
<BR> AND tt.AssignedPC = et_1.EMPLOYID
<BR> AND tt.ClientID = do.CUSTNMBR;
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<LI><H2>The plan is described using results like this:
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TABLE TYPE POSSIBLE_KEYS KEY KEY_LEN REF ROWS EXTRA
<BR><BR>et ALL PRIMARY NULL NULL NULL 74
<BR>tt ref AssignedPC,ClientID,ActualPC ActualPC 15 et.EMPLOYID 52 where used
<BR>et_1 eq_ref PRIMARY PRIMARY 15 tt.AssignedPC 1
<BR>do eq_ref PRIMARY PRIMARY 15 tt.ClientID 1</UL></UL></P>
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