WebFeb 28, 2024 · In the second example, an ORDER BY clause is used to return the top 10 recently hired employees. SQL Copy USE AdventureWorks2012; GO -- Select the first 10 random employees. SELECT TOP (10)JobTitle, HireDate FROM HumanResources.Employee; GO -- Select the first 10 employees hired most recently. WebSQL Server SELECT TOP examples We will use the production.products table in the sample database for the demonstration. 1) Using TOP with a constant value The following example uses a constant value to return the top 10 most expensive products. SELECT TOP 10 product_name, list_price FROM production.products ORDER BY list_price DESC ;
SQL: SELECT TOP Statement - TechOnTheNet
WebDec 3, 2014 · In the main query you filter on rn to get the top 10 rows per category. select T.CellID, T.PathID, T.Duration from ( select T.CellID, T.PathID, T.Duration, row_number () over (partition by T.CellID order by T.Duration desc) as rn from dbo.YourTable as T ) as T where T.rn <= 10; Share Improve this answer Follow answered Dec 3, 2014 at 8:30 WebOct 10, 2024 · 1. 为查询缓存优化你的查询. 大多数的MySQL服务器都开启了查询缓存。. 这是提高性有效的方法之一,而且这是被MySQL的数据库引擎处理的。. 2. EXPLAIN 你的 SELECT 查询. 使用 EXPLAIN 关键字可以让你知道MySQL是如何处理你的SQL语句的。. 这可以帮你分析你的查询语句 ... images uffizi museum in florence italy
TOP in SQL A Glance To Different Parameters TOP in SQL - EduCBA
WebTOP (top_value) It will return the top number of rows in the result set based on top_value. For example, TOP (10) would return the top 10 rows from the full result set. PERCENT Optional. If PERCENT is specified, then the top rows are based on a percentage of the total result set (as specfied by the top_value ). WebJul 25, 2024 · Create a Table in PostgreSQL. Use the FETCH Clause to Select the Top N Rows in PostgreSQL. Use the LIMIT Clause to Select the Top N Rows in PostgreSQL. Use the ROW_NUMBER () Function to Select the Top N Rows in PostgreSQL. Use the RANK () Function to Select the Top N Rows in PostgreSQL. Use the DENSE_RANK () Function to … WebNov 22, 2024 · Method II. Like the OUTOBS=-options limits the number of observations in the output dataset, you can use the INOBS=-option to specify the number of observations that will be read from the input dataset(s).. In the example below, we use the INOBS=5 option to select the first 5 rows from the input dataset work.my_ds.All these 5 observations will be … images uk cabinet