Hi
Toad 13.3.0.181
There is an option to double/single quote strings, but that also quotes NULL values - it should not do that. There is a separate option for that double/single quote strings including Nulls
SQL> select NULL as col1, 12312312 as col2, 'asdad312e' as col3 from dual;
Double quote strings:
COL1 COL2 COL3
"" 12312312 "asdad312e"
Single quote strings:
COL1 COL2 COL3
'' 12312312 'asdad312e'