Unanswered: query to parse out values from one column into different columns
I have a table where different types of values are stored in one field, but I need to seperate them into different fields based on a value in another field.
For (hypothetical) example:
There is an existing table with following info in three columns:
userid record recordtag
1 joe 1
1 j 2
1 jr 3
2 bob 1
2 a 2
2 sr 3
where recordtag indicates (1 for first name, 2 for middle initial, 3 for suffix)
I need to query these records for a report so it the output is:
userID firstname middleinitial suffix
1 joe j jr
2 bob a sr
What's the most efficient approach to create a query that will give me desired results? I have managed to create a very complex query that derives tables for each column I want to create and queries off of that derived table for the 'record' value based on the 'recordtag' values for a given 'userid'. The query is extremely slow, so I know there's some better way out there to get the results I want. Any help would be greatly appreciated. Thanks.
max(case recordtag when 1 then record end) as firstname,
max(case recordtag when 2 then record end) as middleinitial,
max(case recordtag when 3 then record end) as suffix
group by userid
If it's not practically useful, then it's practically useless.