Single quote in dbms_output statement?

问题

I need to include single quotes in dbms_output statement. I've tried this:

 dbms_output.put_line('\''first_name||'\'');

Here first_name is variable; I need to display this inside single quotes.

回答1:

you'd escape by doubling up:

 dbms_output.put_line('''' || first_name || '''');

or using the q-quote mechanism:

 dbms_output.put_line(q'[']'||first_name||q'[']');

eg:

SQL> var b1 varchar2(30)
SQL> exec :b1 := 'this is a test';

PL/SQL procedure successfully completed.

SQL> exec  dbms_output.put_line(q'[']'||:b1||q'[']');
'this is a test'

PL/SQL procedure successfully completed.

SQL> exec  dbms_output.put_line(''''||:b1||'''');
'this is a test'

PL/SQL procedure successfully completed.

SQL> exec  dbms_output.put_line(chr(39)||:b1||chr(39));
'this is a test'

PL/SQL procedure successfully completed.

回答2:

Note that this is only for PL/SQL and must be active.

begin
DBMS_OUTPUT.PUT_LINE('DELETE FROM MYTABLE WHERE MYFIELD <> ''A'';');
end;
/

Assuming you want to match a CHAR 'A'.

来源：https://stackoverflow.com/questions/14690022/single-quote-in-dbms-output-statement