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9.3

Adding an If/Else statement to a sql query

Asked by BobCSD in Oracle 10.x, Programming for ASP.NET, PL / SQL

Tags: Oracle 10g, Case / If syntax, ASP.NET

I have a sql query (not pl/sql stored procedure, a query)... in Oracle 10g.

I want to do an if/else or case statement within the query. Is that possible from a sql statement run in asp.net by using an OracleCommand?

I have the query below.

On the MYORDER value, I want to pass in a value for if the listorder is moved higher, and this is the current questionvalue, then MYORDER is 1.
if the listorder is  moved higher and this is not the current questionvalue then MYORDER is 0.
And if it is the current questionvalue, then MYORDER is 0, and else it is 1.

Like this:
CASE
WHEN @pageMovedHigher = 1 AND
questionValueId = @questionValueId THEN 1
-- sort passed in item with lower number
WHEN @pageMovedHigher = 1 AND
questionValueId <> @questionValueId THEN 0
-- the old item will get a higher number
WHEN questionValueId = @questionValueId THEN 0
-- tie-breaker to make sure new item stays at item, and old item increments to higher number
ELSE 1
END

I want to add that to my query.
Can I do that in the sql snippet below in oracle10g, but NOT in a stored procedure?
thanks.

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sql.AppendLine("UPDATE " & Me.DatabaseTableName & " qv ")
                sql.AppendLine("SET ListOrder = (select newListOrder from ")
                sql.AppendLine("(select questionValueID, row_number() over (order by ListOrder,:MYORDER) newListOrder ")
                sql.AppendLine("from(" & Me.DatabaseTableName & ") ")
                sql.AppendLine("where(QuestionSetId = :QUESTIONSETID1) ")
                sql.AppendLine(") sq ")
                sql.AppendLine("where(sq.questionValueId = qv.questionValueID) ")
                sql.AppendLine(") ")
                sql.AppendLine("where(qv.questionSetId = :QUESTIONSETID2) ")
[+][-]08/25/09 08:16 AM, ID: 25178468Author Comment

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[+][-]08/25/09 09:41 AM, ID: 25179440Accepted Solution

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About this solution

Zones: Oracle 10.x, Programming for ASP.NET, PL / SQL
Tags: Oracle 10g, Case / If syntax, ASP.NET
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Solution Provided By: mwvisa1
Participating Experts: 1
Solution Grade: A
 
[+][-]08/25/09 10:20 AM, ID: 25179874Author Comment

Often, when Experts are collaborating with members who have asked questions, they will request additional information about the problem. Askers respond with an author comment like this one.

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