问题描述
如果可能,我需要使用sql和regex从“旧”列派生“新”列。我正在使用Oracle sql Developer。 如果我在R或Python中使用正则表达式,则可以使用此配方获取“新”列:
<home-loan-submenu [loanId]="loan.loanHeaderId" [source] = source></home-loan-submenu>
谢谢。
使用此:
[1,2,3,4,5,6,7,8,9]{1,5}|\b0\b
old new
P003 3
4 4
P00005 5
P0005 5
12 12
P00000016 16
0 0
解决方法
这里是一个选择:
SQL> with test (old) as
2 (select 'P003' from dual union all
3 select '4' from dual union all
4 select 'P00005' from dual union all
5 select 'P0005' from dual union all
6 select '12' from dual union all
7 select 'P00000016' from dual union all
8 select '0' from dual
9 )
10 select old,to_number(regexp_substr(old,'\d+')) new
11 from test;
OLD NEW
--------- ----------
P003 3
4 4
P00005 5
P0005 5
12 12
P00000016 16
0 0
7 rows selected.
SQL>