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
pro_date date;
begin
select sysdate into pro_date from dual;
dbms_output.put_line(pro_date);
end;
/
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
pro_date date;
begin
select sysdate into pro_date from dual;
dbms_output.put_line(to_char(pro_date,'yyyy-mm-dd'));
end;
/
2014-12-18
PL/SQL procedure successfully completed
Executed in 0.016 seconds
SQL>
SQL> declare
pro_date date;
begin
select sysdate into pro_date from dual;
dbms_output.put_line(pro_date);
end;
/
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
pro_date date;
begin
select sysdate into pro_date from dual;
dbms_output.put_line(pro_date);
end;
/
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
pro_date date;
begin
select sysdate into pro_date from dual;
dbms_output.put_line(pro_date);
end;
/
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。