该函数还可以搭配array_to_string函数将数组转合并成一个字符串: 1 2 select array_to_string(array_agg(distinct ref_no), '&') from cnt_item where updated_on between '2021-05-05' and '2021-05-30 16:13:25'; --合并结果:ITM2105-000001&
array_length(ARRAY[[1, 2], [3, 4], [5, 6]], 2) 结果:2 array_lower(anyarray, int) 返回数组的下标 array_upperer(anyarray, int) 返回数组的上标 array_prepend(anyelement, anyarray) 在数组的开头插入一个元素 示例: array_prepend(7, ARRAY[8, 9]) 结果:{7, 8, 9} array_remove(any...
STRING_TO_ARRAY 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. REGEXP_SPLIT_TO_ARRAY REGEXP_SPLIT_TO_...
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}
array_to_string ( array anyarray, delimiter text [, null_string text ] ) → text array_to_string(ARRAY[1, 2, 3, NULL, 5], ',', '*')→ 1,2,3,*,5返回请求的数组维度的上界。array_upper ( anyarray, integer ) → integer array_upper(ARRAY[1,8,3,7], 1)→ 4...
select * from folder f join uploads u ON u.id = f.folderId where '8' = ANY (string_to_array(some_column,',')) content_copy #sql sql.How to get Quarter’s Start and End Date for a given date in Sql Server DECLARE @AnyDate DATETIME SET @AnyDate = GETDATE() SELECT @Any...
'/'||array_to_string(a0.pathid,'/') as pathid, a0.depth, a0.id,a0.parentid,lpad(a0.id::text, 2*a0.depth-1+length(a0.id::text),' ') as tree_id, --'select pg_cancel_backend('||a0.id|| ');' as cancel_pid, ...
1.1 string_agg函数 1.2 array_agg函数 2、窗口函数 2.1 窗口函数语法 2.2 avg()OVER() 2.3 row_number() 2.4 rank() 2.5 dense_rank() 2.6 lag() 2.7 first_value() 2.8 last_value() 2.9 nth_value() 2.10 窗口函数别名的使用 1、聚合函数 ...
Array types B Boolean types C Composite types D Date/time types E Enum types G Geometric types I Network address types N Numeric types P Pseudo-types R Range types S String types T Timespan types U User-defined types V Bit-string types X unknown type typispreferred:这个字段和 typcategory...
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: ...