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WITH inv AS
(SELECT
w_warehouse_name,
w_warehouse_sk,
i_item_sk,
d_moy,
stdev,
mean,
CASE mean
WHEN 0
THEN NULL
ELSE stdev / mean END cov
FROM (SELECT
w_warehouse_name,
w_warehouse_sk,
i_item_sk,
d_moy,
stddev_samp(inv_quantity_on_hand) stdev,
avg(inv_quantity_on_hand) mean
FROM inventory, item, warehouse, date_dim
WHERE inv_item_sk = i_item_sk
AND inv_warehouse_sk = w_warehouse_sk
AND inv_date_sk = d_date_sk
AND d_year = 2001
GROUP BY w_warehouse_name, w_warehouse_sk, i_item_sk, d_moy) foo
WHERE CASE mean
WHEN 0
THEN 0
ELSE stdev / mean END > 1)
SELECT
inv1.w_warehouse_sk,
inv1.i_item_sk,
inv1.d_moy,
inv1.mean,
inv1.cov,
inv2.w_warehouse_sk,
inv2.i_item_sk,
inv2.d_moy,
inv2.mean,
inv2.cov
FROM inv inv1, inv inv2
WHERE inv1.i_item_sk = inv2.i_item_sk
AND inv1.w_warehouse_sk = inv2.w_warehouse_sk
AND inv1.d_moy = 1
AND inv2.d_moy = 1 + 1
AND inv1.cov > 1.5
ORDER BY inv1.w_warehouse_sk, inv1.i_item_sk, inv1.d_moy, inv1.mean, inv1.cov
, inv2.d_moy, inv2.mean, inv2.cov
|
