注意,为了在GROUPBY块中使用CASE,查询语句需要在GROUPBY块中重复SELECT块中的CASE块。 除了选择自定义字段之外,在很多情况下CASE都非常有用。再深入一步,你还可以得到你以前认为不可能得到的分组排序结果集
SQL Server Azure SQL Database Azure SQL Managed Instance Azure Synapse Analytics Analytics Platform System (PDW) SQL analytics endpoint in Microsoft Fabric Warehouse in Microsoft Fabric SQL database in Microsoft Fabric Evaluates a list of conditions and returns one of multiple possible result expressions...
Suppose you need to specify multiple conditions in the case statement. In this case, the overall code will be lengthy. Sometimes, it is difficult to examine more extended code, and we always look for functions that could do similar work with minimum efforts and without any performance impact. ...
"inputs": { "host": { // ... "operationId": "ExecutePassThroughNativeQuery_V2" }, "parameters": { "server": "default", "database": "default", "query/query": "SELECT * from [dbo].[SampleTable] WHERE AnyId = 42", }, // .. } } } 接続を作成する...
多条件情况查询,sql select case when when else 多条件情况查询 SELECT Title, 'Price Range' = CASE WHEN price IS NULL THEN 'Unpriced' WHEN price < 10 THEN 'Bargain' WHEN price BETWEEN 10 and 20 THEN 'Average' ELSE 'Gift to impress relatives' END FROM titles select *,case when ...
Specifies the conditions for the rows returned in the result set for a SELECT statement, query expression, or subquery. For an UPDATE statement, specifies the rows to be updated. For a DELETE statement, specifies the rows to be deleted. There's no limit to the number of predicates that can...
Applies to: SQL Server 2008 (10.0.x) SP 1 and later versions. Specifies the assembly and method to which the created function name shall refer. assembly_name - must match a value in the name column of SELECT * FROM sys.assemblies;. The name that was used on the CREATE ASSEMBLY statemen...
使用[選取案例層級資料行]頁面,即可從基礎來源 Cube 維度中,選取將成為採礦結構之案例層級資料行的屬性和量值。 注意 唯有在精靈的 [選取定義方法]頁面上選取了 [從現有的 Cube]之後,才會顯示這個頁面。 如需詳細資訊:資料採礦精靈 (Analysis Services - 資料採礦),建立關聯式採礦結構 ...
sql server 中的as when then 多重选择 declare @m tinyint,@time smalldatetime select @m=month(getdate()) select @m=case when @m between 1 and 3 then 1 when @m between 4 and 6 then 4 when @m between 7 and 9 then 7 else 10 end...
case when col_1 in ('a','b') then '第一类' when col_1 in ('a') then '第二类' else '其他' end 1. 2. 3. 4. 2、then 后面是可以跟字段的 select age_level, (case when age_level = 1 then Chile_num when age_level=2 then adult_num when age_level=3 then older_num end) ...