From:http://www.w3school.com.cn/sql/sql_in.asp IN 操作符 IN 操作符允许我们在 WHERE 子句中规定多个值。 SQL IN 语法 SELECT column_name(s) FROM table_name WHERE column_name IN (value1,value2,...) 1. 2. 3. 原始的表 (在实例中使用:) Persons 表: I
SELECT prod_name,prod_price FROM products WHERE (vend_id = 1002 OR id = 1003) AND prod_prive >=10 7、IN操作符 指定范围:查询username是admin和test1的所有用户信息 SELECT * FROM user_info WHERE username IN (‘admin’,‘test1’) 8、NOT 操作符 排除之后跟着的任何条件,复杂sql效果明显: SELECT...
SQL USEAdventureWorks2022; GODELETEPurchasing.PurchaseOrderDetailWHEREPurchaseOrderDetailIDIN(SELECTTOP10PurchaseOrderDetailIDFROMPurchasing.PurchaseOrderDetailORDERBYDueDateASC); GO B. 使用 TOP 來限制插入的數據列數目 下列範例會建立EmployeeSales資料表,且會將HumanResources.Employee資料表的前五名員工的姓名和今...
SQL 複製 USE AdventureWorks2022; GO DELETE Purchasing.PurchaseOrderDetail WHERE PurchaseOrderDetailID IN ( SELECT TOP 10 PurchaseOrderDetailID FROM Purchasing.PurchaseOrderDetail ORDER BY DueDate ASC ); GO B. 使用 TOP 來限制插入的數據列數目 下列範例會建立 EmployeeSales 資料表,且會將 HumanResourc...
3.not in(1,2,3)不在这个范围之内 以上的between...and,in,not in 都是用在where后面的字段的后面 通配符: 1 %代表任意个任意字符 2 _:它就代表一个字符占位,相当于.代表一个具体的字符 3 []:相当于指定一个具体的范围或者具体的值范围。这点用 法与正则表达式一样 ...
在子查询中使用TransactionDate排序,取top 2。并应用in关键字确定记录是否符合该子查询。 二、 自联接方式 1selectmLog.*fromSectionTransactionLog mLog2innerjoin3(SELECTrankLeft.Id,COUNT(*)asrankNumFROMSectionTransactionLog rankLeft4innerjoinSectionTransactionLog rankRight5onrankLeft.SectionId=rankRight.Section...
A less known capability for tuning in SQL Server 2005 is persisted computed columns (PCC). Computed columns can help you shift the runtime computation cost to data modification phase. The computed column is stored with the rest of the row and is transparently utilized when the expression on ...
le système d’exploitation invité n’a pas besoin d’être compatible avec un cluster. Vous pourriez ainsi exécuter SQL Server Workgroup Edition dans un Windows Server 2003 invité, s’exécutant sur Microsoft Virtual Server 2005 sur un cluster. Indirectement, vous avez clusterisé Workgroup Editi...
How many of you have heard the myth that Microsoft® SQL Server® Integration Services (SSIS) does not scale? The first question we would ask in return is: "Does your system need to scale beyond 4.5 million sales transaction rows per second?" SQL Server Integration Services is a high ...
·MaxQueryCost: Which agent has the max SQL execution time estimated by the compiler. ·XDAPages: Which agent has the most number of pages for XDA data (available in V9.1GA and after releases). 例如:图14显示了代理683,即db2bp(DB2后端进程),显然是瓶颈。