STRING_AGG([dbo].[HashTable].[Hash] as [HT1].[Hash],'') WITHIN GROUP (ORDER BY [HT2].[Hash]) Run Code Online (Sandbox Code Playgroud) 另一个问题是与该规则一起使用的聚合(例如MIN、MAX、AVG)没有WITHIN GROUP要满足的顺序,因此替换计划不考虑它。这似乎STRING_AGG并不适合GbApply规则,或者...
I am using the STRING_AGG function within a CTE and it's working just fine (line 11 of the image below). However, I would like to apply an order by clause do the Agg function like i wrote in line 10. When I run que query in SQL Server it works just fine and I get ...
默认情况下,string_agg方法不会去重连接的值。使用DISTINCT参数后,相同的值只会出现一次。 示例:SELECT department, COUNT(DISTINCT employee_id) AS employee_count FROM employees GROUP BY department WITH ROLLUP; 结果为每个部门的员工数量,包括总的员工数量和每个部门的详细信息 三、使用场景 string_agg方法在处理...
SQL语句查询结果不一致。某业务场景中的SQL语句中使用了string_agg函数,语句逻辑如下:执行如下SQL语句:在循环多次执行这个语句的时候,发现结果不稳定,输出结果有时候是t1,有时候是t2,因此怀疑是数据库有问题,结果集不正确。String_agg函数的作用是将组内的数据合并
Building a field name by concatenating strings for SELECT statement Building where clause dynamically in stored procedure Bulk Import from files with different column order bulk insert - Bulk load data conversion error BULK INSERT - Will not accept datetime value regardless of format. Bulk Insert --...
order by可以任意字段、表达式、类型转换 selectgid, string_agg(val,','orderbyxx::numeric)fromtbl1groupbygid;selectgid, string_agg(val,','orderbyabs(xxx))fromtbl1groupbygid;selectgid, string_agg(val,','orderbymod(x,5),xxxx)fromtbl1groupbygid; ...
The following example replaces null values with 'N/A' and returns the names separated by commas in a single result cell. SQL USEAdventureWorks2022; GOSELECTSTRING_AGG(CONVERT(NVARCHAR(MAX),ISNULL(FirstName,'N/A')),',')AScsvFROMPerson.Person; GO ...
STRING_AGG( expression , separator ) [<order_clause>]<order_clause>::=WITHINGROUP(ORDERBY<order_by_expression_list>[ASC|DESC] ) 参数 expression 任何类型的表达式。 表达式在串联期间转换为 nvarchar或varchar类型。 非字符串类型转换为nvarchar类型。
SELECTdepartment_id,string_agg(employee_name,'/'ORDERBYemployee_id)ASemployee_namesFROMemployeesGROUPBYdepartment_idORDERBYdepartment_id; 参考リンク postgresql - How to get result from string_agg() with a proper order by - Stack Overflow
sql STRING_AGG 作用优先级,withfas(select*fromUNNEST([1,3,8,9,13,23,5,4,23,55,77,6])asfruit)SELECT*,STRING_AGG(cast(fruitasstring),",")OVER(ORDERBYfruitROWSBETWEEN0FOLLOWINGAND3FOLLOWING)asclick_historyFROMfwherefruit>4;STRING_AGG的.