Last Observation Carried Forward In T-SQL

Kevin Feasel

2018-08-13

T-SQL

Pawan Khowal shows one example of implementing Last Observation Carried Forward in T-SQL:

A very close friend given this to me. In this puzzle you have to fill the price of SKU & Color Id for missing months. Note that SKU & Color Id should be considered as a business unit. So you have to set the previous value available to the missing month. Please check out the sample input and the expected output. In this solution I have not considered any performance considerations.

Included is one solution, though there are others.

Related Posts

Dealing With Large JSON Values

Bert Wagner investigates an issue he found where his long JSON strings were becoming NULL in SQL Server: After a little bit more research, I discovered that the return type for JSON_VALUE is limited to 4000 characters.   Since JSON_VALUE is in lax mode by default, if the output has more than 4000 characters, it fails silently. […]

Read More

Deleting Top Records With An Order By Clause

Kenneth Fisher shows that deleting the top N records with an ORDER BY clause is not straightforward: Did you know you can’t do this? DELETE TOP (10) FROM SalesOrderDetail ORDER BY SalesOrderID DESC; Msg 156, Level 15, State 1, Line 8 Incorrect syntax near the keyword ‘ORDER’. I didn’t. Until I tried it anyway. Turns […]

Read More

Categories

August 2018
MTWTFSS
« Jul Sep »
 12345
6789101112
13141516171819
20212223242526
2728293031