特殊符号‘的使用

用来表示it’s a person

SQL> select ename||'it'a person' from emp where deptno=10

2 ;

ERROR:

ORA-01756: 引号内的字符串没有正确结束

解决方法：

SQL> select ename||' it''s a person' from emp where deptno=10;

ENAME||'IT''APERSON'

---------------------

aa it's a person

CLARK it's a person

KING it's a person

MILLER it's a person

SQL> select ename||' it'||chr(39)||'s a person' from emp where deptno=10;

ENAME||'IT'||CHR(39)||'SA

-------------------------

aa it's a person

CLARK it's a person

KING it's a person

MILLER it's a person

SQL> select ename||' it'||''''||'s a person' from emp where deptno=10;

ENAME||'IT'||''''||'SAPE

------------------------

aa it's a person

CLARK it's a person

KING it's a person

MILLER it's a person