Question

我在下面的查询中紧跟着只显示大写字符串，但这里面临1个问题

SELECT SUBSTR(REGEXP_REPLACE(' ' || REGEXP_REPLACE(DESC, '(^[A-Z]|[a-z]|[A-Z][a-z]+|[,])', ''), ' +', ' '), 2, 9999),ID,DESC AS OUTPUT
FROM ( 
    select ID,DESC
    from MASTER where TABLE like 'D%'
)

上面的查询在以下示例中起作用：

“这是NUMBER”结果：NUMBER

但是在以下情况下失败

“ A_NUMBER是一个数字”结果：_NUMBER

Answer 1

我想您应该按照以下常规程序将comma替换为underscore：

create table master( id int, "TABLE" varchar2(35),"DESC" varchar2(100));
insert into master values(1,'Dolphin1','A_NUMBER is a number');
insert into master values(2,'Dolphin2','This is a NUMBER');

SELECT SUBSTR(REGEXP_REPLACE(' ' 
                             || REGEXP_REPLACE("DESC", '(^[A-Z]|[a-z]|[A-Z][a-z]+|[_])', ''), ' +', ' '), 2, 9999) AS OUTPUT
FROM ( 
    select ID,"DESC"
    from MASTER where "TABLE" like 'D%'
);

ID  OUTPUT
1   NUMBER
2   NUMBER

SQL Fiddle Demo

从列仅获取大写字符串

1 个答案: