This document introduces the syntax of conditional functions in Spark SQL. IF You are advised to use theIFfunction inNew Calculation Columnof FineDatalink. For details about the example, seeAdding a Column Using the IF Function. NVL Syntax: NVL(Expression,Default value) ...
If you ever want to conditionally count the number of times a particular condition occurs in SQL, you can do it in Oracle using thecaseandcountfunctions. Here's a simple example which counts the number of males/females stored inPS_PERSONAL_DATA.selectcount(casewhenSEX='M'then1end)asMALES,c...
Table 1Conditional functions Conditional Function Description CASE value WHEN value1_1 [, value1_2 ]* THEN result1 [ WHEN value2_1 [, value2_2 ]* THEN result2 ]* [ ELSE resultZ ] END ReturnsresultXwhen the first value in (valueX_1, valueX_2, ...) is included. If there is no...
七、CONDITIONALFUNCTIONS IN HIVE Hive supports three types of conditional functions. These functions are listed below: IF( Test Condition, True Value, False Value ) The IF condition evaluates the “Test Condition” and if the “Test Condition” is true, then it returns the “True Value”. Oth...
上例中使用case和if,语法参见最后{七、CONDITIONAL FUNCTIONS IN HIVE} 注意: 1,case特殊用法:case后可无对象,而在when后加条件判断语句,如,case when a=1 then true else false end; 2,select后的变换字段提取,对应在groupby中也要有,如carrier的case处理。(否则select不到)。但group by 后不能起表别名(as...
Conditional Functions for Numbers Date Functions JSON Functions Miscellaneous Utility Functions Number Functions Object Functions Pattern-Matching Functions Search Functions String Functions Token Functions Type Functions User-Defined Functions Window Functions Subqueries Hints Boolean Logic Statements SQL++ Auditing...
Example SELECTif(1,plus(2,2),plus(2,6)); Result: ┌─plus(2, 2)─┐ │ 4 │ └────────────┘ multiIf Allows to write theCASEoperator more compactly in the query. Syntax multiIf( cond_1,then_1, cond_2,then_2,...,else) ...
Conditional functions CASE expressions enable conditional logic, COALESCE returns first non-null value, NULLIF compares expressions for null. February 26, 2025 Amazondynamodb › developerguideKey condition expressions for the Query operation in DynamoDB DynamoDB Query operation uses key condition ...
Conditional Query with SQL The idea of the conditional query is to display some value in a column, depending on another value. While this task is basic in any programming language, in SQL it requires some research. Thus, let’s imagine that you want to get a table, telling you which cou...
Unloading data to Amazon S3 Unloading encrypted data files Unloading data in delimited or fixed-width format Reloading unloaded data User-defined functions UDF security and permissions Preventing UDF naming conflicts Scalar SQL UDFs Example Scalar Python UDFs Example Python UDF data types Python language...