select 1,'孙' union all select 1,'李' union all select 2,'周' go 2.创建自定义字符串聚合函数 Create FUNCTION AggregateString ( @Id int ) RETURNS varchar(1024) AS BEGIN declare @Str varchar(1024) set @Str = '' select @Str = @Str + [Name] from AggregationTable where [Id] = @Id...
select @Str = @Str + [Name] from AggregationTable where [Id] = @Id return @Str END GO 3.执行下面的语句,并查看结果 复制代码代码如下: select dbo.AggregateString(Id),Id from AggregationTable group by Id 结果为: 4>通过xml操作 select stuff((select ','+title from tb for xml path(''))...
SELECTName:'SELECT'Description: Syntax:SELECT[ALL | DISTINCT | DISTINCTROW][HIGH_PRIORITY][STRAIGHT_JOIN][SQL_SMALL_RESULT][SQL_BIG_RESULT][SQL_BUFFER_RESULT]SQL_NO_CACHE[SQL_CALC_FOUND_ROWS]select_expr[, select_expr ...][FROM table_references [PARTITION partition_list][WHERE where_condition]...
SQL Server 中的 STRING_AGG 函数 SQL Server 2017 提供了字符串聚合函数:STRING_AGG。例如,以下查询返回了每个部门中的员工: SELECT dept_id, STRING_AGG(emp_name, ';') FROM employee GROUP BY dept_id;
public void Accumulate(SqlString value) { if (value.IsNull) { return; } this.intermediateResult.Append(value.Value).Append(','); } /// <summary> /// Merge the partially computed aggregate with this aggregate. /// </summary> /// <param name="other"></param> ...
$orderby string エントリの順序を指定するための ODATA orderBy クエリです。 スキップ数 $skip integer スキップするエントリ数です (既定値 = 0)。 上から順に取得 $top integer 取得するエントリの合計数です (既定値 = すべて)。 クエリを選択する $select string エントリから...
MEMBER FUNCTION ODCIAggregateIterate(self IN OUT t_clob_agg, value IN clob) RETURN NUMBER IS BEGIN -- Concatenate string only when not already existing in the list (=unique) SELF.g_string := self.g_string || ',' || value; RETURN ODCIConst.Success; END; MEMBER FUNCTION ODCIAggregateTermi...
STRING_AGGis an aggregate function that takes all expressions from rows and concatenates them into a single string. Expression values are implicitly converted to string types and then concatenated. The implicit conversion to strings follows the existing rules for data type conversions. For more informa...
STRING_AGGis an aggregate function that takes all expressions from rows and concatenates them into a single string. Expression values are implicitly converted to string types and then concatenated. The implicit conversion to strings follows the existing rules for data type conversions. For more informa...
The OVER clause may follow all aggregate functions, except the STRING_AGG, GROUPING or GROUPING_ID functions.Use aggregate functions as expressions only in the following situations:The select list of a SELECT statement (either a subquery or an outer query). A HAVING clause.Transact-SQL provides ...