Question

我需要字符串中包含4个大写字母的所有组。

所以我正在使用REGEXP_REPLACE([Description],'\b(?![A-Z]{4}\b)\w+\b',' ') 在Tableau中替换所有小写字母和额外字符。我想只获得4个字符串长度的大写字母实例。

通过google我知道我不能使用Regex_extract（因为/ g不受支持）

我的字符串：

"The following trials have no study data-available, in the RBM mart. It appears as is this because they were . In y HIWEThe trials currently missing data are: JADA, JPBD, JVCS, JADQ, JVDI, JVDO, JVTZ"

我写过[^A-Z]{4}/g。

我想：

HIWE JADA JPBD JVCS JADQ JVDI JVDO JVTZ

但这也给了我一个大写字母和空格。

由于

Answer 1

您可以使用this regex：

((?<=[A-Z]{4})|^).*?(?=[A-Z]{4}|$)

解释

(                    # one of:
    ^                # the starting position
  |                  # or
    (?<=[A-Z]{4})    # any position after four upper letters
)                    # 
.*?                  # match anything till the first:
(?=                  # position which in front
    [A-Z]{4}         # has four upper letters
  |                  # or
    $                # is the string's end
)                    #

任何疑问都可以随意问：）

正则表达式给所有字母

1 个答案: