oracle中连接单引号...
时间：2010-08-19 来源：mengxianhua
select to_char('v')from dual;
select '' || to_char('v') || ''from dual;
select '''' || to_char('v') || '''' from dual;
select '''''' || to_char('v') || '''''' from dual;
select '''''''' || to_char('v') || '''''''' from dual;
select ' '' ' ||' ' || ' '' ' || to_char('v') || ' '' '' ' from dual;
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