根據輸入刪除where子句的一部分

Question

我有以下查詢，其中如果@Searchby的輸入是1，我想省略過濾器created_by = @searchBy。我怎樣才能做到這一點？

CREATE PROC [dbo].[RptCashCollectionInner] 
    @branchId int, 
    @searchBy int, 
    @paidDate datetime 
AS 
BEGIN 
    SELECT Id 
    FROM reading 
    WHERE created_by = @searchBy 
     AND branch_id = @branchId 
END; 

Answer 1

您可以短路與or運營商搜索的元素：

CREATE PROC [dbo].[RptCashCollectionInner] 
    @branchId int, @searchBy int, @paidDate datetime AS 
BEGIN 
    select Id, from reading 
    where (@searchBy = 1 or created_by=@searchBy) and branch_id=@branchId 
END; 

或者，更優雅，與in操作：

CREATE PROC [dbo].[RptCashCollectionInner] 
    @branchId int, @searchBy int, @paidDate datetime AS 
BEGIN 
    select Id, from reading 
    where @searchBy in (1, created_by) and branch_id=@branchId 
END; 

Answer 2

CREATE PROC [dbo].[RptCashCollectionInner] 
    @branchId int, @searchBy int, @paidDate datetime AS 
BEGIN 
    select Id from reading 
    where (@searchBy = 1 or created_by=@searchBy) and branch_id=@branchId 
END;