Oftentimes, cursors are used to concatenate multiple columns into one string. For instance, you may want something like this to show as ‘A,B,C’ on your report (Table table_A):
Id Char_Value1 'A'2 'B'3 'C'In a cursor, rather than checking for values and using an exists condition and having an if/else block, you can accomplish the same result using a case statement.
The following example is for Sybase/SQL Server:
Begin CursorFetch @Char_ValueUpdate table_ASet Char_Col = Case When DataLength(LTrim(Char_Col)) > 0 Then Char_Col + ',' + @Char_Value Else @Char_Value EndWhere Condition End Cursor
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