langs a-z

Task/Determine-if-a-string-is-numeric/PL-SQL/determine-if-a-string-is-numeric-1.sql

@@ -0,0 +1,11 @@
+FUNCTION IsNumeric( value IN VARCHAR2 )
+RETURN BOOLEAN
+IS
+  help NUMBER;
+BEGIN
+  help := to_number( value );
+  return( TRUE );
+EXCEPTION
+  WHEN others THEN
+    return( FALSE );
+END;

Task/Determine-if-a-string-is-numeric/PL-SQL/determine-if-a-string-is-numeric-2.sql

@@ -0,0 +1,5 @@
+Value VARCHAR2( 10 ) := '123';
+IF( IsNumeric( Value ) )
+  THEN
+    NULL;
+END  IF;