Help with an SQL query with multiple case statements

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I have a query, actually I have 8 bit fields in my table and I want to select the one that is true.
Please help me.

VB

Dim Sql As String = "SELECT [EmployeeID],([FirstName]+[LastName]) AS EmpName,[Department],[MonthlySalary], "
            Sql = Sql & " PayPeriod=(CASE WHEN WeeklyWages='1' THEN (CASE WHEN WeeklyWages='1' THEN 'Weekly' END) "
            Sql = Sql & " ELSE (CASE WHEN SemiMonthlyWages='1' THEN (CASE WHEN SemiMonthlyWages='1' THEN 'SemiMonthly' END) "
            Sql = Sql & " ELSE(CASE WHEN MonthlyWages='1' THEN (CASE WHEN MonthlyWages='1' THEN 'Monthly' END) "
            Sql = Sql & " ELSE(CASE WHEN QuarterlyWages='1' THEN (CASE WHEN QuarterlyWages='1' THEN 'Quarterly' END) "
            Sql = Sql & " ELSE(CASE WHEN HalfYearlyWages='1' THEN (CASE WHEN HalfYearlyWages='1' THEN 'HalfYearly' END) "
            Sql = Sql & " ELSE(CASE WHEN yearlyWages='1' THEN (CASE WHEN yearlyWages='1' THEN 'Yearly' END) "
            Sql = Sql & " ELSE(CASE WHEN DailyWages='1' THEN (CASE WHEN DailyWages='1' THEN 'Daily' END) "
            Sql = Sql & " ELSE(CASE WHEN MiscWages='1' THEN (CASE WHEN MiscWages='1' THEN 'Miscellaneous' END) "
            Sql = Sql & " END)END)END)END)END)END)END)END) "
            Sql = Sql & " FROM [IRLPayRollSystem].[irlPayRoll].[Employee_Details_Entry]  where [irlPayRoll].[Employee_Details_Entry].EmployeeID = '" & Session("AddPayrollEmp") & "'"

[Edit - Summarized the subject, moved the question to the base of the question, fixed spelling, removed text speak]

Posted 7-Feb-12 1:28am

arpita mondal

Updated 7-Feb-12 5:10am

Kschuler

v2

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Christian Graus · Answer 1 · 2012-02-07T03:58:00

VB

ELSE(CASE WHEN MonthlyWages='1' THEN (CASE WHEN MonthlyWages='1' THEN 'Monthly' END) "

Why do you check each case twice ?

I don't see why this would not work. It seems convoluted, why not one 'case' statement that iterates through all the possibilities ? Why not use 'as' to give your column a name ? If you have 8 bit fields, what happens if more than one is selected ? I think you havea design flaw and you meant one field to contain a value that maps to an enum.