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 array
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...
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('...
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(): ...
regexp_split_to_array(string text, pattern text [, flags text ]) Split string using a POSIX regular expression as the delimiter. b.实际例子 postgres=# SELECT regexp_split_to_array('kenyon,love,,china,!',','); regexp_split_to_array --- {kenyon,love,"",china,!} (1 row) postgres...
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...
() function accepts a string as the first argument, splits it into array elements, and concatenates the array elements using a delimiter/separator. The separator can be any value, such as white space, comma, semi-colon, etc. This write-up explained Postgres' STRING_TO_ARRAY() function ...
overlay(stringtextPLACINGnewsubstringtextFROMstartinteger[FORcountinteger] ) →text 替换string从start字符开始的子串,并用newsubstring扩展到count字符。 如果省略了count,则默认为newsubstring的长度。 overlay('Txxxxas' placing 'hom' from 2 for 4)→Thomas ...
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: ...