regexp_split_to_table 和 regexp_split_to_array 都是字符串分隔函数,可通过指定的表达式进行分隔。区别是 regexp_split_to_table 将分割出的数据转成行,regexp_split_to_array 是将分隔的数据转成数组。 https://zhangzw.com/posts/20200601.html...
array_lower(anyarray, int)intreturns lower bound of the requested array dimensionarray_lower('[0:2]={1,2,3}'::int[], 1)0 array_prepend(anyelement, anyarray)anyarrayappend an element to the beginning of an arrayarray_prepend(1, ARRAY[2,3]){1,2,3} array_to_string(anyarray, text...
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 ...
1.split_part a.语法介绍 split_part(string text, delimiter text, field int) Split string on delimiter and return the given field (counting from one) b.实际例子 postgres=# select split_part('abc~@~def~@~ghi','~@~', 2); split_part --- def (1 row) postgres=# select split_part('...
✅ 最佳回答: 您可以将其拆分为一个数组,然后访问每个数组元素: select col1, elements[1] as col2, elements[2] as col3 from ( select col1, regexp_split_to_array(col1, '\s*;\s*') as elements from the_table ) t 本站已为你智能检索到如下内容,以供参考: 🐻 相关问答 5 个 1、...
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 array. You can pass any delimiters. Below are two sample example using regexp_split_to_array(): ...
Assumes no ';' in the fileNames var queries = fs.readFileSync(fileName).toString() .replace(/(\r\n|\n|\r)/gm," ") // remove newlines .replace(/\s+/g, ' ') // excess white space .split(";") // split into all statements .map(Function.prototype.call, String.prototype.trim...
unnest( -- Expands the array into individual rows string_to_array( -- Converts a comma-separated string into an array 'water,land,air', -- The comma-separated string to be converted ',' -- The delimiter used to split the string ...
#syslog_split_messages = on # 当启用把日志记录到syslog时,这个参数决定消息如何送达 syslog。 # This is only relevant when logging to eventlog (win32): #event_source = 'PostgreSQL' # 当启用了向事件日志记录时,这个参数决定用来标识日志中PostgreSQL消息的程序名。默认值是PostgreSQL。 # - When to ...
regexp_split_to_array函数的行为和regexp_split_to_table相同,不过regexp_split_to_array会把它的结果以一个text数组的形式返回。它的语法是regexp_split_to_array(string, pattern [, flags ])。这些参数和regexp_split_to_table的相同。 一些例子: ...