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Puissance instantannée teleinfo
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/* | |
Indication de la puissance "instantanné" a partir de l'index EDF (en Wh). | |
Il s'agit en fait l'évolution de l'index sur la plus petite unité de temps possible (dépend de la fréquence de remonté | |
de l'info, en général 1 min ou 30 sec) | |
divisée par l'interval entre les deux mesures --> puissance en W. | |
Sur des intervals de temps plus longz, selon correspond à la puissance moyenne utilisée. | |
*/ | |
SELECT | |
*, | |
(value - FIRST_VALUE(value) OVER (ORDER BY recorded ROWS 1 PRECEDING)) | |
/ NULLIF(EXTRACT( EPOCH FROM recorded - FIRST_VALUE(recorded) OVER (ORDER BY recorded ROWS 1 PRECEDING) ) /3600, 0) | |
FROM survey s | |
WHERE id_measurment = 13 | |
ORDER BY recorded DESC |
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