SQLServer2008关于CASEWHEN CASE WHEN的两种格式 1.简单Case函数 CASE sex WHEN '1' THEN '男'WHEN '2' THEN '⼥'ELSE '其他' END 2.Case搜索函数 CASE WHEN sex = '1' THEN '男'WHEN sex = '2' THEN '⼥'ELSE '其他' END 1).两者相⽐,Case搜索函数功能更强。2).Case函数类似于if……...
WHEN country='E' or country='F' THEN '3组' END ps. Order by 后也可使用Case when 用于筛选需要的排序数据 Example: order by case when ISNULL(A.ReqDate,'')!='' then A.ReqDate else A.PlanReqDate end desc
END 组别,SUM(people) 人数合计 from #temp group by CASE WHEN country='A' or country='B' THEN '1组' WHEN country='C' or country='D' THEN '2组' WHEN country='E' or country='F' THEN '3组' END ps. Order by 后也可使用Case when 用于筛选需要的排序数据 Example: order by case whe...
create proc pr_getOrederInfo_1 ( @p_OrderNumber int , @p_CustomerId varchar(20) , @p_OrderDateBegin datetime , @p_OrderDateEnd datetime ) as begin set nocount on; declare @strSql nvarchar(max); set @strSql= 'SELECT [id] ,[OrderNumber] ,[CustomerId] ,[OrderDate] ,[Remark] FROM...
case when in sql server's stored procedure Evaluates a list of conditions and returns one of multiple possible result expressions. The CASE expression hastwo formats: The simple CASE expression compares an expression to a set of simple expressions to determine the result....
我正在使用 SQL Server 2008 R2。 我想要对表中的记录进行基于优先级的排序。 所以我在 ORDER BY 子句中使用 CASE WHEN 语句。 ORDER BY 子句如下: ORDER BY CASE WHEN TblList.PinRequestCount <> 0 THEN TblList.PinRequestCount desc, TblList.LastName ASC, TblList.FirstName ASC, TblList.MiddleName...
case when in sql server's stored procedure https://docs.microsoft.com/en-us/sql/t-sql/language-elements/case-transact-sql Evaluates a list of conditions and returns one of multiple possible result expressions. The CASE expression hastwo formats:...
SQL CASE Examples The following SQL goes through conditions and returns a value when the first condition is met: ExampleGet your own SQL Server SELECTOrderID, Quantity, CASE WHENQuantity >30THEN'The quantity is greater than 30' WHENQuantity =30THEN'The quantity is 30' ...
sql中的case when的功能是实现单列或者多列的条件统计，其实Pandas也可以实现的，比如万能的apply方法，...
在SQL的CASE块中嵌套逻辑可以通过多层嵌套的方式实现。CASE语句是一种条件表达式,可以根据不同的条件返回不同的结果。 下面是一个示例,展示了如何在SQL的CASE块中嵌套逻辑: 代码语言:txt 复制 SELECT column_name, CASE WHEN condition1 THEN result1 WHEN condition2 THEN CASE WHEN condition3 THEN result3 WHEN...