I am trying to update a field Time_Stampin my table simple_pack_datato match the values ββin a similarly named field in my table temp_data. Each table has fields with a name Test_Numberand Time_Markerthat I use for INNER JOINtables. Time_Markercorresponds to the number of samples, where Time_Stampis the actual time from the start of the test.
I want to update Time_Stampone test at a time, so the code I tried:
UPDATE simple_pack_data s
INNER JOIN (
SELECT *
FROM temp_data t
WHERE t.Test = "3"
) AS tmp
ON s.Test_Number = tmp.Test_Number AND s.Time_Marker = tmp.Time_Marker
SET s.Time_Stamp = tmp.Time_Stamp
WHERE s.Test_Number = "3";
When I run this, it takes more than 50 seconds and I get error 1205. If I run a similarly structured select statement:
SELECT *
FROM simple_pack_data s
INNER JOIN (
SELECT *
FROM temp_data t
WHERE t.Test = "3"
) AS tmp
ON s.Test_Number = tmp.Test AND s.Time_Marker = tmp.Time_Marker
WHERE s.Test_Number = "3";
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