在PostgreSQL中,string_to_array函数用于将字符串转换为数组。下面是对你问题的详细回答: string_to_array函数的作用: string_to_array函数的主要作用是将一个由指定分隔符分隔的字符串转换为数组。这在处理包含多个值的字符串时非常有用,尤其是在需要将这些值作为独立元素进行处理时。 string_to_array函数的基本语法...
b.NAME,array_agg(t.name)FROMbooks bLEFTJOINtags tONt."id"=ANY( STRING_TO_ARRAY( b.tags,',') )GROUPBYb.ID, b.NAMEORDERBYb.ID-- 结果-- 01 Book01 {Tag01}-- 02 Book02 {Tag01,Tag02}-- 03 Book03 {Tag01,Tag02,Tag03}
ip_address ,port_address ,interface_class ,interface_require_type ,interface_love_type , ( SELECT string_agg(ui."name",',') FROM user_info ui WHERE CAST ( ui.user_id AS VARCHAR ) = ANY ( string_to_array( alarm_user, ',' ) ) ) alarm_user_name, (select string_agg(sdd.dict_val...
string : 待分割的字符串 pattern:正则表达式或指定分割字符串 Tips:查询具体排序的第几个的用regexp_split_to_array函数,查询是否包含的条件,则使用ARRAY_AGG与 regexp_split_to_table两个函数 4.regexp_split_to_array 和上面一样,只是返回数据类型,语法: regexp_split_to_array( string, pattern ) string ...
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...
STRING_TO_ARRAY函数将字符串分割为数组元素,并允许指定空字符串的替换值。 SELECTstring_to_array('xx~^~yy~^~zz','~^~');-- 返回 {xx,yy,zz}SELECTstring_to_array('xx~^~yy~^~zz','~^~','yy');-- 返回 {xx,NULL,zz} 1. 2.
SELECT UNNEST(String_To_Array('10;20;',';')) 我也尝试过: 代码语言:javascript 运行 AI代码解释 SELECT a,b FROM (select UNNEST(String_To_Array('12;5;25;10;2',';'))) a LEFT JOIN (select UNNEST(String_To_Array('12;5;25;10',';'))) b ON a = b 但没有得到正确的结果。 我不...
PostgreSQL provides various array functions such asARRAY_APPEND(), ARRAY_TO_STRING(), ARRAY_REPLACE(), etc.STRING_TO_ARRAY()is one of them. Each array function serves a unique functionality. For instance, the STRING_TO_ARRAY() function converts a string into an array. ...
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...
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: ...