dbms_output语句中的单引号? [英] Single quote in dbms_output statement?

问题描述

我需要在dbms_output语句中包含单引号.我已经尝试过了:

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

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

这里的名字是 variable ；我需要在单引号中显示它.

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

推荐答案

您可以通过加倍逃脱:

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

或使用 q报价机制:

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

例如:

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.

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