oracle中to_char方法怎么用
1)用作日期转换:
to_char(date,'格式');
示例如下:
select to_date('2005-01-01 ','yyyy-MM-dd') from dual; select to_char(sysdate,'yyyy-MM-dd HH24:mi:ss') from dual;
(2)处理数字:
to_char(number,'格式');
示例如下:
select to_char(88877) from dual; select to_char(1234567890,'099999999999999') from dual; select to_char(12345678,'999,999,999,999') from dual; select to_char(123456,'99.999') from dual; select to_char(1234567890,'999,999,999,999.9999') from dual;
(3)TO_CHAR 是把xxx转换为字符串,不能指定字符串长度。
TO_CHAR(xxx) 例如:TO_CHAR(999) 得到字符串999
扩展知识:
to_char(salary,'$99,99'); select TO_CHAR(123,'$99,999.9') from dual;
用于进制转换:将10进制转换为16进制;
select to_char(4567,'xxxx') from dual; select to_char(123,'xxx') from dual;
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