select to_char(to_date('29-6月 -10','yyyy-MON-dd'),'yyyy-mm-dd') from dual;
Connected to: Oracle Database 10g Release 10.1.0.2.0 - ProductionSQL> select sysdate from dual;SYSDATE ---------- 08-11月-10SQL> alter session set nls_date_format='yyyy-mm-dd';Session altered.SQL> select sysdate from dual;SYSDATE ---------- 2010-11-08SQL>
给你个思路,首先把目标字符串内容按照“-”分隔抽取出来,如年 月 日,然后重新组成想要的顺序,用日期函数得到时间。实现抽取方法。CREATE OR REPLACE TYPE ty_str_split IS TABLE OF VARCHAR2 (4000);CREATE OR REPLACE FUNCTION fn_split (p_str IN VARCHAR2, p_delimiter IN VARCHAR2) RETURN ty_str_split IS j INT := 0; i INT := 1; len INT := 0; len1 INT := 0; str VARCHAR2 (4000); str_split ty_str_split := ty_str_split (); BEGIN len := LENGTH (p_str); len1 := LENGTH (p_delimiter); WHILE j < len LOOP j := INSTR (p_str, p_delimiter, i); IF j = 0 THEN j := len; str := SUBSTR (p_str, i); str_split.EXTEND; str_split (str_split.COUNT) := str; IF i >= len THEN EXIT; END IF; ELSE str := SUBSTR (p_str, i, j - i); i := j + len1; str_split.EXTEND; str_split (str_split.COUNT) := str; END IF; END LOOP; RETURN str_split; END fn_split; /测试:DECLARE CURSOR c IS SELECT * FROM TABLE (CAST (fn_split ('1-12-123-1234-12345', '-') AS ty_str_split ) ); r c%ROWTYPE; BEGIN OPEN c; LOOP FETCH c INTO r; EXIT WHEN c%NOTFOUND; DBMS_OUTPUT.put_line (r.column_value); END LOOP; CLOSE c; END;
--如果你的字段是date类型查询出来29-6月 -10 想改成2010-06-29的话 1、 alter session set nls_date_format='yyyy-mm-dd' 2、 select to_char(colnum,'yyyy-mm-dd') from tablename
你这个思路很好,就是笔误了一下 select to_char(to_date('29-6月 -10','dd-MON-yy'),'yyyy-mm-dd') from dual;谢谢大家
Connected to:
Oracle Database 10g Release 10.1.0.2.0 - ProductionSQL> select sysdate from dual;SYSDATE
----------
08-11月-10SQL> alter session set nls_date_format='yyyy-mm-dd';Session altered.SQL> select sysdate from dual;SYSDATE
----------
2010-11-08SQL>
RETURN ty_str_split
IS
j INT := 0;
i INT := 1;
len INT := 0;
len1 INT := 0;
str VARCHAR2 (4000);
str_split ty_str_split := ty_str_split ();
BEGIN
len := LENGTH (p_str);
len1 := LENGTH (p_delimiter); WHILE j < len
LOOP
j := INSTR (p_str, p_delimiter, i); IF j = 0
THEN
j := len;
str := SUBSTR (p_str, i);
str_split.EXTEND;
str_split (str_split.COUNT) := str; IF i >= len
THEN
EXIT;
END IF;
ELSE
str := SUBSTR (p_str, i, j - i);
i := j + len1;
str_split.EXTEND;
str_split (str_split.COUNT) := str;
END IF;
END LOOP; RETURN str_split;
END fn_split;
/测试:DECLARE
CURSOR c
IS
SELECT *
FROM TABLE (CAST (fn_split ('1-12-123-1234-12345', '-') AS ty_str_split
)
); r c%ROWTYPE;
BEGIN
OPEN c; LOOP
FETCH c INTO r; EXIT WHEN c%NOTFOUND;
DBMS_OUTPUT.put_line (r.column_value);
END LOOP; CLOSE c;
END;
1、
alter session set nls_date_format='yyyy-mm-dd'
2、
select to_char(colnum,'yyyy-mm-dd') from tablename
select to_char(to_date('29-6月 -10','dd-MON-yy'),'yyyy-mm-dd') from dual;谢谢大家