FETCH NEXT 10ROWS ONLY;这个查询的执行原理如下：1. ORDER BY: 首先，查询会根据 employee_id 对 employees 表中的数据进行排序。这是为了确保分页 的连续性。2. OFFSET 10 ROWS: 这个部分告诉 SQL Server 跳过前10行。也就是说，它不会返回这10行数据。3. FETCH NEXT 10 ROWS ONLY: 这告诉 SQL Server ...
步骤3:使用OPTION (RECOMPILE) 为了进一步提高性能,可以使用OPTION (RECOMPILE)提示来告诉SQL Server在执行查询时重新编译查询计划。这样可以根据实际查询的参数值来生成一个更优化的查询计划。 -- 使用OPTION (RECOMPILE)的示例代码SELECT*FROMOrdersORDERBYOrderDateOFFSET10ROWSFETCHNEXT10ROWSONLYOPTION(RECOMPILE); 1...
FETCH NEXT FROM contact_cursor INTO @LastName, @FirstName; -- Check @@FETCH_STATUS to see if there are any more rows to fetch. WHILE @@FETCH_STATUS = 0 BEGIN -- Concatenate and display the current values in the variables. PRINT 'Contact Name: ' + @FirstName + ' ' + @LastName...
-- Perform the first fetch and store the values in variables.--Note:The variables are in the same order as the columns-- in the SELECT statement.FETCH NEXT FROM contact_cursor INTO @LastName, @FirstName;-- Check @@FETCH_STATUS to see if there are any more rows to fetch.WHILE @@...
-- Perform the first fetch and store the values in variables.--Note:The variables are in the same order as the columns-- in the SELECT statement.FETCH NEXT FROM contact_cursor INTO @LastName, @FirstName;-- Check @@FETCH_STATUS to see if there are any more rows to fetch.WHILE @@...
FETCHFIRST3ROWS ONLY; Exercise? What would the following query do in SQL Server? SELECT TOP 5 * FROM Customers; Select the first 5 records from the Customers table Select the last 5 records from the Customers table Select 5 records sorted by CustomerName ...
-- Perform the first fetch and store the values in variables.--Note:The variables are in the same order as the columns-- in the SELECT statement.FETCH NEXT FROM contact_cursor INTO @LastName, @FirstName;-- Check @@FETCH_STATUS to see if there are any more rows to fetch.WHILE @@...
在进行分页操作之前,我们需要一个简单的流程图来指导整个实现过程。下表展示了实现 SQL Server 分页的步骤: 二、实现细节 1. 选择要分页的表 假设我们有一个名为Employees的表,结构如下: CREATETABLEEmployees(EmployeeIDINTPRIMARYKEY,FirstName NVARCHAR(50),LastName NVARCHAR(50),HireDateDATE,SalaryDECIMAL(18,2...
select * from products.series where state = 'xxx' order by id FETCH FIRST 1 ROWS ONLY 以及我在 SQL Server 上遇到的错误: Invalid usage of the option FIRST in the FETCH statement. 我尝试用 SQL Server 中似乎承认的 NEXT 替换 FIRST,但没有成功。 我正在使用 SQL Sever 2014...
Display the next 10 rows of results. Getting Top Records If you wish to get the top ten rows in a query, then you can do so by setting OFFSET to 0. Remember the OFFSET specifies the number of rows to skip. By setting it to zero, we’re telling SQL to start at the first row. ...