Initial data commit

Task/Conditional-structures/SQL/conditional-structures-1.sql

@@ -0,0 +1,9 @@
+case when a then b else c end
+
+declare @n int
+set @n=124
+print case when @n=123 then 'equal' else 'not equal' end
+
+--If/ElseIf expression
+set @n=5
+print case when @n=3 then 'Three' when @n=4 then 'Four' else 'Other' end

Task/Conditional-structures/SQL/conditional-structures-2.sql

@@ -0,0 +1,9 @@
+declare @n int
+set @n=123
+if @n=123
+  BEGIN --begin/end needed if more than one statement inside
+    print 'one two three'
+  END
+ELSE
+  if @n=124 print 'one two four'
+  else print 'other'