PostgreSQL 数据库提供 regexp_split_to_table 和 regexp_split_to_array 两个函数用于分隔字符串成表和数组,在某些场景下使用起来还挺方便的。 举个例子:有这样一张表,维护用户的兴趣,多个兴趣用逗号分隔。 --表结构CREATETABLEpublic.t_user (user_namecharactervarying(20)NOTNULL,--用户姓名interestcharacterva...
In Postgresql, the regexp_split_to_array() function is used to split the specified string into an array using the specified POSIX regular expressions. The strings as well as the POSIX regular expression are provided to the function as an argument. This expression will act as a separator for ...
regexp_split_to_table,regexp_split_to_array,array,unnest 使用 实例1 select regexp_split_to_table('hello world', '\s+') ; select regexp_split_to_array('hello world', '\s+') ; postgres=# select regexp_split_to_table('hello world', '\s+') ; regexp_split_to_table --- hello...
In this post, I am providing a solution to split a string by using a different type of delimiters in PostgreSQL. Splitting a string is a very common requirement for all PostgreSQL Database Developers. I used regexp_split_to_array to split the string and store the result into a string ar...
select regexp_split_to_table(coalesce('/home/postgres/test.sh',''),E'\/'), n from generate_series(1,5,2) n; 1. 2. 3. 4. 结果 regexp_split_to_array实例 实例 select regexp_split_to_array('how,are,you,doing',',');
思路 思路一： 利用HashSet的元素不能重复，如果有重复的元素，则删除重复元素，如果没有则添加，最后剩...
在 Python 中，我们可以使用反转和比较列表、使用 zip（） 函数、将列表转换为字符串等方法检查两个列表...
表达式将字符串拆分为两个字符，第一个字符是反斜杠，例如
Whenever you need to split a text into multiple records breaking by some delimeter, there are two common options that PostgreSQL provides. The first isregpexp_split_to_tableand then next popular is using the unnest function in combination withstring_to_array. ...