Oracle存储过程获取YYYY-MM-DD的时间格式

环境：Oracle 10g,11g

问题重现：PL/SQL中命令窗口下，发现存储过程得到的时间格式不符合预期要求。

SQL> select sysdate from dual;



SYSDATE

-----------

2014-12-18



Executed in 0 seconds



SQL> set serveroutput on

SQL> declare

2 pro_date date;

3 begin

4 select sysdate into pro_date from dual;

5 dbms_output.put_line(pro_date);

6 end;

7 /



18-12月-14



PL/SQL procedure successfully completed



Executed in 0.016 seconds

处理方法1：将结果转换成字符串格式：

SQL> SQL> declare

2 pro_date date; 3 begin

4 select sysdate into pro_date from dual; 5 dbms_output.put_line(to_char(pro_date,'yyyy-mm-dd')); 6 end; 7 /



2014-12-18 PL/SQL procedure successfully completed Executed in 0.016 seconds SQL> SQL> declare

2 pro_date date; 3 begin

4 select sysdate into pro_date from dual; 5 dbms_output.put_line(pro_date); 6 end; 7 /



18-12月-14 PL/SQL procedure successfully completed Executed in 0 seconds

处理方法2：改变会话的NLS_DATE_FORMAT

SQL> alter session set nls_date_format='yyyy-mm-dd hh24:mi:ss';



Session altered



Executed in 0.015 seconds



SQL> 

SQL> declare

2 pro_date date;

3 begin

4 select sysdate into pro_date from dual;

5 dbms_output.put_line(pro_date);

6 end;

7 /



2014-12-18 11:18:15



PL/SQL procedure successfully completed



Executed in 0 seconds



SQL> alter session set nls_date_format='yyyy-mm-dd';



Session altered



Executed in 0 seconds



SQL> 

SQL> declare

2 pro_date date;

3 begin

4 select sysdate into pro_date from dual;

5 dbms_output.put_line(pro_date);

6 end;

7 /



2014-12-18



PL/SQL procedure successfully completed



Executed in 0 seconds

总结：在Oracle存储过程想要获取YYYY-MM-DD的时间格式，可以转换成字符串处理，可以临时指定会话的NLS_DATE_FORMAT变量，还可以整体修改客户端的环境变量。