Need help writing query to inactivate all except the most recent record

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Need help writing query to inactivate all except the most recent record

Goalie35

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Points: 871
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February 19, 2020 at 2:38 pm
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#3727086

In the following table, there can be multiple records per order (indicated by OrderID). There is also a bit Active flag field on each record, which are all currently set to true. So all records are active & I now need to go in and deactivate all old records for all orders EXCEPT the most recent one (I would think evaluating either the OrderDetailID or CreatedDate should both suffice to determine the most recent). What's the best way to do this?
Here's the relevant fields on my table:
Table Name: OrderDetails
OrderDetailsID | OrderID | Active | CreatedDate
123 | 111 | 1 | 2020-01-01
124 | 111 | 1 | 2020-02-02
125 | 111 | 1 | 2020-02-15
126 | 222 | 1 | 2020-01-15
127 | 222 | 1 | 2020-02-05
128 | 333 | 1 | 2020-01-20
In the above table, I would like to set the Active field to zero for all records except the most recent record for each OrderID. So after the update, the table should look like this:
OrderDetailsID | OrderID | Active | CreatedDate
123 | 111 | 0 | 2020-01-01
124 | 111 | 0 | 2020-02-02
125 | 111 | 1 | 2020-02-15
126 | 222 | 0 | 2020-01-15
127 | 222 | 1 | 2020-02-05
128 | 333 | 1 | 2020-01-20
What's the best way to do this?
Thanks
Mark Cowne

One Orange Chip

Points: 26952
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February 19, 2020 at 3:02 pm
Answer
#3727093
```
WITH CTE AS (
SELECT OrderDetailsID, OrderID, Active, CreatedDate,
       ROW_NUMBER() OVER(PARTITION BY OrderID ORDER BY OrderDetailsID DESC) AS rn
FROM OrderDetails
)
UPDATE CTE
   SET Active = 0
WHERE Active = 1 AND rn > 1;
```
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Johan Bijnens SSC Guru Points: 135369 More actions · Answer 1

What did you test ?

logically step-1 determine the max CreatedDate per orderid

logically step-2 update all rows for the given orders that do not have CreatedDate equal to the max_CreatedDate for that given orderid

Johan

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Matt Miller (4) SSC Guru Points: 124210 More actions · Answer 2

Mark Cowne wrote:

WITH CTE AS (
SELECT OrderDetailsID, OrderID, Active, CreatedDate,
       ROW_NUMBER() OVER(PARTITION BY OrderID ORDER BY OrderDetailsID DESC) AS rn
FROM OrderDetails
)
UPDATE CTE
   SET Active = 0
WHERE Active = 1 AND rn > 1;

You may care to move the WHERE Active=1 to inside the CTE. as in (reusing Mark's as a reference) -

WITH CTE AS (
SELECT OrderDetailsID, OrderID, Active, CreatedDate,
       ROW_NUMBER() OVER(PARTITION BY OrderID ORDER BY OrderDetailsID DESC) AS rn
FROM OrderDetails
WHERE Active = 1 
)
UPDATE CTE
   SET Active = 0
WHERE rn > 1;

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