Question

我在Oracle中有一个列，其中字符串以011开头，一些字符串是完美的，我不想删除。通过使用此Oracle查询，我得到了这个结果

select termnum, substr(termnum,4) as New_TermNum from reject

   Termnum                New_Termnum
011390864324465           390864324465
011390465772400           390465772400
0117845300123             7845300123
6306900110                6900110
7893465126                3465126

我希望像这样拥有New_Termnum专栏

   Termnum                New_Termnum
011390864324465           390864324465
011390465772400           390465772400
0117845300123             7845300123
6306900110                6306900110
7893465126                7893465126

感谢您提前获得帮助

Answer 1

当且仅当字符串以011

开头时才要删除011

select (case when substr(termnum,1,3) = '011'
             then substr(termnum,4)
             else termnum
         end) as newTermNum
  from reject

Answer 2

您可以REGEXP_REPLACE使用CASE或SUBSTR：

SELECT termnum,
       REGEXP_REPLACE( termnum, '^011' ) AS new_termnum,
       CASE SUBSTR( termnum, 1, 3 )
            WHEN '011' THEN SUBSTR( termnum, 4 )
                       ELSE termnum
            END AS new_termnum2
FROM   reject;

<强>输出：

TERMNUM         NEW_TERMNUM     NEW_TERMNUM2  
--------------- --------------- ---------------
011390864324465 390864324465    390864324465    
011390465772400 390465772400    390465772400    
0117845300123   7845300123      7845300123      
6306900110      6306900110      6306900110      
7893465126      7893465126      7893465126

在Oracle中剥离角色

2 个答案: