sqlserver limit分页sql语句 
时间: 2023-04-27 19:06:27 浏览: 98
SQL Server中没有类似于MySQL的LIMIT语句,但可以使用ROW_NUMBER()函数来实现分页。以下是一个示例SQL语句:
SELECT *
FROM (
SELECT ROW_NUMBER() OVER (ORDER BY column_name) AS row_num, *
FROM table_name
) AS subquery
WHERE row_num BETWEEN start_index AND end_index;
其中,column_name是用于排序的列名,table_name是要查询的表名,start_index和end_index是要查询的行数范围。例如,要查询第11到第20行的数据,可以将start_index设置为11,end_index设置为20。
相关问题
sqlserver limit用法
在SQL Server中,没有像MySQL中的LIMIT关键字来进行分页查询。但是可以使用TOP关键字和子查询来实现类似的功能。以下是两个案例来演示如何在SQL Server中进行分页查询:
案例一:查前几条
如果要查询用户名为1的前5条记录,可以使用以下SQL语句:
SELECT TOP 5 * FROM browserecord WHERE username = '1';
案例二:查第几条到第几条
如果要查询第4条到第7条的信息,可以使用以下SQL语句:
SELECT * FROM (SELECT TOP 7 *, ROW_NUMBER() OVER (ORDER BY recordid) AS rownumber FROM browserecord) AS #a WHERE rownumber >= 4;
在这个案例中,我们使用了ROW_NUMBER()函数来为每一行分配一个行号,并按照recordid进行排序。然后在外部查询中,我们选择行号在4到7之间的记录。
总结起来,虽然SQL Server没有像MySQL中的LIMIT关键字,但是可以使用TOP关键字和子查询来实现类似的分页查询功能。
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sqlserver 分页sql
SQL Server中没有类似于MySQL的LIMIT语句,但可以使用ROW_NUMBER()函数来实现分页。以下是一个示例SQL语句:
SELECT *
FROM (
SELECT ROW_NUMBER() OVER (ORDER BY column_name) AS row_num, *
FROM table_name
) AS subquery
WHERE row_num BETWEEN start_index AND end_index;
其中,column_name是用于排序的列名,table_name是要查询的表名,start_index和end_index是要查询的行数范围。例如,要查询第11到第20行的数据,可以将start_index设置为11,end_index设置为20。
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以下是JavaWeb中的简单分页完整代码,使用JSP和Servlet实现:
1. 在JSP页面中,使用表格展示数据并添加分页导航:
jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>分页示例</title>
</head>
<body>
分页示例
ID
姓名
年龄
<c:forEach items="${list}" var="user">
${user.id}
${user.name}
${user.age}
</c:forEach>
<c:if test="${page > 1}"> 上一页 </c:if> <c:if test="${page < pageCount}"> 下一页 </c:if> </body> </html> 2. 在Servlet中查询数据库并设置分页相关参数: java package com.example.servlet; import java.io.IOException; import java.util.List; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import com.example.dao.UserDao; import com.example.entity.User; @WebServlet("/list") public class UserListServlet extends HttpServlet { private static final long serialVersionUID = 1L; protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { int pageSize = 10; // 每页显示的记录数 int page = Integer.parseInt(request.getParameter("page")); // 当前页码 int offset = (page - 1) * pageSize; // 当前页第一条记录的偏移量 UserDao dao = new UserDao(); List<User> list = dao.list(offset, pageSize); // 查询当前页的数据 int totalCount = dao.count(); // 总记录数 int pageCount = (int) Math.ceil(totalCount * 1.0 / pageSize); // 总页数 request.setAttribute("list", list); request.setAttribute("page", page); request.setAttribute("pageCount", pageCount); request.getRequestDispatcher("list.jsp").forward(request, response); } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request, response); } } 3. 在DAO中查询数据库并返回数据: java package com.example.dao; import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.util.ArrayList; import java.util.List; import com.example.entity.User; public class UserDao { private String url = "jdbc:mysql://localhost:3306/test?useSSL=false&serverTimezone=UTC"; private String username = "root"; private String password = "123456"; public List<User> list(int offset, int pageSize) { List<User> list = new ArrayList<>(); try (Connection conn = DriverManager.getConnection(url, username, password)) { String sql = "SELECT * FROM user LIMIT ?, ?"; try (PreparedStatement stmt = conn.prepareStatement(sql)) { stmt.setInt(1, offset); stmt.setInt(2, pageSize); try (ResultSet rs = stmt.executeQuery()) { while (rs.next()) { User user = new User(); user.setId(rs.getInt("id")); user.setName(rs.getString("name")); user.setAge(rs.getInt("age")); list.add(user); } } } } catch (Exception e) { e.printStackTrace(); } return list; } public int count() { int count = 0; try (Connection conn = DriverManager.getConnection(url, username, password)) { String sql = "SELECT COUNT(*) FROM user"; try (PreparedStatement stmt = conn.prepareStatement(sql)) { try (ResultSet rs = stmt.executeQuery()) { if (rs.next()) { count = rs.getInt(1); } } } } catch (Exception e) { e.printStackTrace(); } return count; } } 可以根据需求自行修改代码,例如更改每页显示的记录数、更改查询语句等。
<c:if test="${page > 1}"> 上一页 </c:if> <c:if test="${page < pageCount}"> 下一页 </c:if> </body> </html> 2. 在Servlet中查询数据库并设置分页相关参数: java package com.example.servlet; import java.io.IOException; import java.util.List; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import com.example.dao.UserDao; import com.example.entity.User; @WebServlet("/list") public class UserListServlet extends HttpServlet { private static final long serialVersionUID = 1L; protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { int pageSize = 10; // 每页显示的记录数 int page = Integer.parseInt(request.getParameter("page")); // 当前页码 int offset = (page - 1) * pageSize; // 当前页第一条记录的偏移量 UserDao dao = new UserDao(); List<User> list = dao.list(offset, pageSize); // 查询当前页的数据 int totalCount = dao.count(); // 总记录数 int pageCount = (int) Math.ceil(totalCount * 1.0 / pageSize); // 总页数 request.setAttribute("list", list); request.setAttribute("page", page); request.setAttribute("pageCount", pageCount); request.getRequestDispatcher("list.jsp").forward(request, response); } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request, response); } } 3. 在DAO中查询数据库并返回数据: java package com.example.dao; import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.util.ArrayList; import java.util.List; import com.example.entity.User; public class UserDao { private String url = "jdbc:mysql://localhost:3306/test?useSSL=false&serverTimezone=UTC"; private String username = "root"; private String password = "123456"; public List<User> list(int offset, int pageSize) { List<User> list = new ArrayList<>(); try (Connection conn = DriverManager.getConnection(url, username, password)) { String sql = "SELECT * FROM user LIMIT ?, ?"; try (PreparedStatement stmt = conn.prepareStatement(sql)) { stmt.setInt(1, offset); stmt.setInt(2, pageSize); try (ResultSet rs = stmt.executeQuery()) { while (rs.next()) { User user = new User(); user.setId(rs.getInt("id")); user.setName(rs.getString("name")); user.setAge(rs.getInt("age")); list.add(user); } } } } catch (Exception e) { e.printStackTrace(); } return list; } public int count() { int count = 0; try (Connection conn = DriverManager.getConnection(url, username, password)) { String sql = "SELECT COUNT(*) FROM user"; try (PreparedStatement stmt = conn.prepareStatement(sql)) { try (ResultSet rs = stmt.executeQuery()) { if (rs.next()) { count = rs.getInt(1); } } } } catch (Exception e) { e.printStackTrace(); } return count; } } 可以根据需求自行修改代码,例如更改每页显示的记录数、更改查询语句等。


