Oracle、MySQL和SqlServe分页查询的语句区别
★先来定义分页语句将要用到的几个参数: int currentPage ; //当前页 intpageRecord ; //每页显示记录数 以之前的ADDRESSBOOK数据表为例(每页显示10条记录): 一、SqlServe 下载 数据库分页语句 Java代码 Stringsql= selecttop pageRecord *fromaddressbook
★先来定义分页语句将要用到的几个参数:
- int currentPage ; //当前页
- int pageRecord ; //每页显示记录数
以之前的ADDRESSBOOK数据表为例(每页显示10条记录):
一、SqlServe下载 数据库分页语句
Java代码
- String sql = "select top "+pageRecord +" * from addressbook where id not in (select top "+(currentPage-1)*pageRecord +" id from t_user)";
- // (currentPage-1)*pageRecord : 是指从第几个记录开始
第二页SQL演示:
select top 20 * from addressbook where id not in (select top 10 id from addressbook)
二、MySQL数据库分页语句
Java代码
- String sql = "select * from addressbook where limit "+(currentPage-1)*pageRecord +","+pageRecord +"";
- //select * from 表名 【条件】limit M,N;
- //M为从第几个记录开始,比如每页显示3条记录,第二页就必须从第4条记录开始
- //N每页读几个数据
第二页SQL演示:
select * from addressbook where limit 10,10
三、Oracle数据库分页语句
Java代码

- String sqls = "select * from ( select rownum rn,t.* from addressbook t where rownum +currentPage*pageRecord+" ) where rownum > "+(currentPage -1)*pageRecord;
第二页SQL演示:
select * from ( select rownum rn,t.* from addressbook where rownum 10

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics



MySQL is an open source relational database management system, mainly used to store and retrieve data quickly and reliably. Its working principle includes client requests, query resolution, execution of queries and return results. Examples of usage include creating tables, inserting and querying data, and advanced features such as JOIN operations. Common errors involve SQL syntax, data types, and permissions, and optimization suggestions include the use of indexes, optimized queries, and partitioning of tables.

MySQL is chosen for its performance, reliability, ease of use, and community support. 1.MySQL provides efficient data storage and retrieval functions, supporting multiple data types and advanced query operations. 2. Adopt client-server architecture and multiple storage engines to support transaction and query optimization. 3. Easy to use, supports a variety of operating systems and programming languages. 4. Have strong community support and provide rich resources and solutions.

MySQL's position in databases and programming is very important. It is an open source relational database management system that is widely used in various application scenarios. 1) MySQL provides efficient data storage, organization and retrieval functions, supporting Web, mobile and enterprise-level systems. 2) It uses a client-server architecture, supports multiple storage engines and index optimization. 3) Basic usages include creating tables and inserting data, and advanced usages involve multi-table JOINs and complex queries. 4) Frequently asked questions such as SQL syntax errors and performance issues can be debugged through the EXPLAIN command and slow query log. 5) Performance optimization methods include rational use of indexes, optimized query and use of caches. Best practices include using transactions and PreparedStatemen

In Oracle, the FOR LOOP loop can create cursors dynamically. The steps are: 1. Define the cursor type; 2. Create the loop; 3. Create the cursor dynamically; 4. Execute the cursor; 5. Close the cursor. Example: A cursor can be created cycle-by-circuit to display the names and salaries of the top 10 employees.

SQL statements can be created and executed based on runtime input by using Oracle's dynamic SQL. The steps include: preparing an empty string variable to store dynamically generated SQL statements. Use the EXECUTE IMMEDIATE or PREPARE statement to compile and execute dynamic SQL statements. Use bind variable to pass user input or other dynamic values to dynamic SQL. Use EXECUTE IMMEDIATE or EXECUTE to execute dynamic SQL statements.

Apache connects to a database requires the following steps: Install the database driver. Configure the web.xml file to create a connection pool. Create a JDBC data source and specify the connection settings. Use the JDBC API to access the database from Java code, including getting connections, creating statements, binding parameters, executing queries or updates, and processing results.

Triggers in Oracle are stored procedures used to automatically perform operations after a specific event (insert, update, or delete). They are used in a variety of scenarios, including data verification, auditing, and data maintenance. When creating a trigger, you need to specify the trigger name, association table, trigger event, and trigger time. There are two types of triggers: the BEFORE trigger is fired before the operation, and the AFTER trigger is fired after the operation. For example, the BEFORE INSERT trigger ensures that the age column of the inserted row is not negative.

To stop an Oracle database, perform the following steps: 1. Connect to the database; 2. Shutdown immediately; 3. Shutdown abort completely.
