Oracle預存程序擷取YYYY-MM-DD的時間格式

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環境：Oracle 10g,11g

問題重現：PL/SQL中命令視窗下，發現預存程序得到的時間格式不符合預期要求。

SQL> select sysdate from dual;SYSDATE-----------2014-12-18Executed in 0 secondsSQL> set serveroutput onSQL> declare2 pro_date date;3 begin4 select sysdate into pro_date from dual;5 dbms_output.put_line(pro_date);6 end;7 /18-12月-14PL/SQL procedure successfully completedExecuted in 0.016 seconds

處理方法1：將結果轉換成字串格式：

SQL> SQL> declare2 pro_date date;3 begin4 select sysdate into pro_date from dual;5 dbms_output.put_line(to_char(pro_date,‘yyyy-mm-dd‘));6 end;7 /2014-12-18PL/SQL procedure successfully completedExecuted in 0.016 secondsSQL> SQL> declare2 pro_date date;3 begin4 select sysdate into pro_date from dual;5 dbms_output.put_line(pro_date);6 end;7 /18-12月-14PL/SQL procedure successfully completedExecuted in 0 seconds

處理方法2：改變會話的NLS_DATE_FORMAT

SQL> alter session set nls_date_format=‘yyyy-mm-dd hh24:mi:ss‘;Session alteredExecuted in 0.015 secondsSQL> SQL> declare2 pro_date date;3 begin4 select sysdate into pro_date from dual;5 dbms_output.put_line(pro_date);6 end;7 /2014-12-18 11:18:15PL/SQL procedure successfully completedExecuted in 0 secondsSQL> alter session set nls_date_format=‘yyyy-mm-dd‘;Session alteredExecuted in 0 secondsSQL> SQL> declare2 pro_date date;3 begin4 select sysdate into pro_date from dual;5 dbms_output.put_line(pro_date);6 end;7 /2014-12-18PL/SQL procedure successfully completedExecuted in 0 seconds

總結：在Oracle預存程序想要擷取YYYY-MM-DD的時間格式，可以轉換成字串處理，可以臨時指定會話的NLS_DATE_FORMAT變數，還可以整體修改用戶端的環境變數。

Oracle預存程序擷取YYYY-MM-DD的時間格式