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