Width_Bucket can be used to assign bucket value for a given expression that falls in a range of values. The WIDTH_BUCKET(ROUND(q_date.as_of-q_t.due_date,0), 1, 180, 6) specifies that the value between 1 and 180 is split into 6 buckets/segments (180/6 =30). The bucket values will be 1 for range between 1-30, 2 for range between 31-60, and so on. The value of 0 and value higher than 180 are out of bound values. As shown below 0 days open will have 0 as the bucket value and 235 days open will have a value of 7. |
The same can be also done using CASE or DECODE(SIGN(..)). |
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