# 條件函數

條件函數都會評估條件，然後根據條件值傳回不同回答。這些函數可用於載入指令碼和圖表運算式。

使用各個函數的下拉式清單，查看各函數的簡短描述及語法。按一下語法描述中的函數名稱以取得更多詳細資料。

[](https://help.qlik.com/en-US/qlikview/Subsystems/Client/Content/QV_QlikView/Scripting/ConditionalFunctions/conditional-functions.htm)

#### alt

alt 函數會傳回參數中第一個具有效數字表示法的參數。如果找不到符合的參數，則會傳回最後一個參數。可使用任意數目的參數。

[**alt**](https://help.qlik.com/zh-TW/qlikview/September2025/Subsystems/Client/Content/QV_QlikView/Scripting/ConditionalFunctions/alt.htm)(case1[ , case2 , case3 , ...] , else)

[](https://help.qlik.com/en-US/qlikview/Subsystems/Client/Content/QV_QlikView/Scripting/ConditionalFunctions/conditional-functions.htm)

#### class

class 函數會將第一個參數指派給組距。結果為同時具有文字值和數值的雙值，文字值為 a<=x<b (其中 a 和 b 是箱的上限及下限)，數值為下限。

[**class**](https://help.qlik.com/zh-TW/qlikview/September2025/Subsystems/Client/Content/QV_QlikView/Scripting/ConditionalFunctions/class.htm)(expression, interval [ , label [ , offset ]])

[](https://help.qlik.com/en-US/qlikview/Subsystems/Client/Content/QV_QlikView/Scripting/ConditionalFunctions/conditional-functions.htm)

#### if

if 函數會根據隨函數提供的條件評估為 True 或 False 傳回值。

[**if**](https://help.qlik.com/zh-TW/qlikview/September2025/Subsystems/Client/Content/QV_QlikView/Scripting/ConditionalFunctions/if.htm)(condition , then , else)

[](https://help.qlik.com/en-US/qlikview/Subsystems/Client/Content/QV_QlikView/Scripting/ConditionalFunctions/conditional-functions.htm)

#### match

match 函數會比較第一個參數與後面的所有參數，並傳回相符的運算式數目。比較區分大小寫。

[**match**](https://help.qlik.com/zh-TW/qlikview/September2025/Subsystems/Client/Content/QV_QlikView/Scripting/ConditionalFunctions/match.htm)( str, expr1 [ , expr2,...exprN ])

[](https://help.qlik.com/en-US/qlikview/Subsystems/Client/Content/QV_QlikView/Scripting/ConditionalFunctions/conditional-functions.htm)

#### mixmatch

mixmatch 函數會比較第一個參數與後面的所有參數，並傳回相符的運算式數目。比較區分大小寫，並區分日語平假名和片假名字元系統。

[**mixmatch**](https://help.qlik.com/zh-TW/qlikview/September2025/Subsystems/Client/Content/QV_QlikView/Scripting/ConditionalFunctions/mixmatch.htm)( str, expr1 [ , expr2,...exprN ])

[](https://help.qlik.com/en-US/qlikview/Subsystems/Client/Content/QV_QlikView/Scripting/ConditionalFunctions/conditional-functions.htm)

#### pick

pick 函數會傳回清單中第 n 個運算式。

[**pick**](https://help.qlik.com/zh-TW/qlikview/September2025/Subsystems/Client/Content/QV_QlikView/Scripting/ConditionalFunctions/pick.htm)(n, expr1[ , expr2,...exprN])

[](https://help.qlik.com/en-US/qlikview/Subsystems/Client/Content/QV_QlikView/Scripting/ConditionalFunctions/conditional-functions.htm)

#### wildmatch

wildmatch 函數會比較第一個參數與後面的所有參數，並傳回相符的運算式數目。允許在比較字串中使用萬用字元 ( \* 和 ?)。比較區分大小寫，並區分日語平假名和片假名字元系統。

[**wildmatch**](https://help.qlik.com/zh-TW/qlikview/September2025/Subsystems/Client/Content/QV_QlikView/Scripting/ConditionalFunctions/wildmatch.htm)( str, expr1 [ , expr2,...exprN ])