1) Analytic aggregate functions 上面的例子中所用为AVG(),还可以使用其他聚合函数: MIN()和MAX() AVG()和SUM() COUNT() 聚合函数,会将窗口的所有值作为输入,并返回单个值。 2) Analytic navigation functions Navigation functionsassign a value based on the value in a (usually) different row than the ...
SELECT CustomerName, City, Country FROM Customers ORDER BY (CASE WHEN City IS NULL THEN Country ELSE City END);NULL Functions MySQL/SQL Server IFNULL() function SELECT ProductName, UnitPrice * (UnitsInStock + IFNULL(UnitsOnOrder, 0)) FROM Products; or COALESCE() SELECT ProductName, UnitPr...
Subtotal rows are super-aggregate rows that contain further aggregates whose values are derived by applying the same column functions that were used to obtain the grouped rows. The CUBE super-group is the other SQL-99 extension to the GROUP BY clause that produces a result set containing all...
Awindow functionperforms a calculation across a set of table rows that are somehow related to the current row. This is comparable to the type of calculation that can be done with an aggregate function. But unlike regular aggregate functions, use of a window function does not cause rows to be...
This is not your run-of-the-mill SQL training. This course is tailored for those who already grasp the basics and are eager to delve into the intricate queries used in real-world business scenarios. Expect a deep dive into advanced join types, aggregate functions, window functions, and even...
Aggregate … Into … All All Aggregate … Into … Any Any Aggregate … Into … Average Average Aggregate … Into … Count Count Aggregate … Into … LongCount LongCount Aggregate … Into … Max Max Aggregate … Into … Min Min Aggregate … Into … Sum Sum Distinct Distinct Group ...
Math Functions ABS Function AGGREGATE Function ARABIC Function BASE Function CEILING.MATH Function COMBIN Function COMBINA Function DECIMAL Function DEGREES Function EVEN Function EXP Function FACT Function FACTDOUBLE Function FLOOR.MATH Function GCD Function INT Function LCM Function LN Function LOG Function...
Math Functions ABS Function AGGREGATE Function ARABIC Function BASE Function CEILING.MATH Function COMBIN Function COMBINA Function DECIMAL Function DEGREES Function EVEN Function EXP Function FACT Function FACTDOUBLE Function FLOOR.MATH Function GCD Function INT Function LCM Function LN Function LOG Function...
Window Functions 本节使用的示例数据库如下所示: student(sid, name, login, gpa) enrolled(sid, cid, grade) course(cid, name) Aggregates 聚合函数有如下: AVG(col) MIN(col) MAX(col) SUM(col) COUNT(col) SELECTCOUNT(login)AScntFROMstudentWHEREloginLIKE'%@cs';SELECTCOUNT(*)AScntFROMstudentWHER...
manipulation APIs hdfs_putget ORCH's get and put API usage hive_aggregate Aggregation in HIVE hive_analysis Basic analysis & data processing operations hive_basic Basic connectivity to HIVE storage hive_binning Binning logic hive_columnfns Column function hive_nulls Handling of NULL in SQL vs. NA...