import org.apache.flink.table.functions.AggregateFunction; import java.util.Iterator; public class TestAggregateFunction extends AggregateFunction<Long, TestAggregateFunction.SumAll> { //返回最终结果 @Override public Long getValue(SumAll acc) { return acc.sum; } //构建保存中间结果的对象 @Override p...
STRING_AGG is an aggregate function. For more information, see String Functions (Transact-SQL) in the SQL Server documentation. MySQL Usage Amazon Aurora MySQL-Compatible Edition (Aurora MySQL) supports a large set of string functions; far more than SQL Server. ...
Aggregate functions Expand table FunctionDescription any(expr) Returns true if at least one value of expr in the group is true. any_value(expr[,ignoreNull]) Returns some value of expr for a group of rows. approx_count_distinct(expr[,relativeSD]) Returns the estimated number of dis...
However, ignoring this difference can cause us to hit a wall in aggregate filtering. For example, to filter out the sum of the grades of students with an average score greater than 60, if you do not use subqueries, you cannot add aggregate functions to WHERE in ordinary queries. For examp...
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 LISTAGG function aggregates a set of strings into one string by concatenating the strings. Optionally, a separator string can be provided which is inserted between contiguous input strings.
For example, conditional aggregate functions can be used to implement the segment comparison functionality.-ArrayThe -Array suffix can be appended to any aggregate function. In this case, the aggregate function takes arguments of the 'Array(T)' type (arrays) instead of 'T' type arguments. ...
SQL_AGGREGATE_FUNCTIONS 3.0 An SQLUINTEGER bitmask enumerating support for aggregation functions:SQL_AF_ALLSQL_AF_AVGSQL_AF_COUNTSQL_AF_DISTINCTSQL_AF_MAXSQL_AF_MINSQL_AF_SUMA SQL-92 Entry level-conformant driver will always return all of these options as supported. SQL_ALTER_DOMAIN 3.0 An ...
Learn more about Transact-SQL functions in the following articles:STRING_ESCAPE (Transact-SQL) STUFF (Transact-SQL) CONCAT (Transact-SQL) CONCAT_WS (Transact-SQL) Aggregate Functions (Transact-SQL) String Functions (Transact-SQL)Feedback Was this page helpful? Yes No Provide product feedback |...