Home Database Mysql Tutorial 自动生成程序,免去增,删,改,查的数据库编程 ( 定义游标,逐

自动生成程序,免去增,删,改,查的数据库编程 ( 定义游标,逐

Jun 07, 2016 pm 03:35 PM
definition database cursor program programming Automatic generated

数据库编程,繁琐的增,删,改,查。 每个表都要实现,为了简化工作,可以用以下的sql批处理来输出你想要得结果。 不用一个一个列去写。 只需要提供表名称tablename,并把print部分修改成你需要的就可以了。 --请设置查询分析器以文本显示结果 --定义变量 de

数据库编程,繁琐的增,删,改,查。
每个表都要实现,为了简化工作,可以用以下的sql批处理来输出你想要得结果。
不用一个一个列去写。
只需要提供表名称tablename,并把print部分修改成你需要的就可以了。

--请设置查询分析器以文本显示结果

--定义变量
declare @tablename nvarchar(50)--表的名称
declare @tableid int  --表的id
declare @colname nvarchar(50)  --列名
declare @index int    

--赋值
set @tablename = 'tablename'  -->>>tablename改为你要查询的表名         
select @tableid = id from sysobjects where id = object_id(@tablename)
set @index = 0

--定义游标,逐个遍历表的每个列
declare columns_cursor cursor
for select name as 'Column_name' from syscolumns where id = @tableid order by colid
--打开游标
open columns_cursor
fetch next from columns_cursor into @colname

while @@FETCH_STATUS = 0
begin
     -->>>这句需要修改成你要的样式即可(增,删,改,查。)
     --我的这句是向一个数据控件写数据(用友华表cell)
     print 'axCell1.SetCellString(' + cast(@index as nvarchar) + ', j, 0, ds.Tables[0].Rows[i]["'  + @colname + '"].ToString());'

     set @index = @index + 1
     fetch next from columns_cursor into @colname
end

--关闭,释放游标
close columns_cursor
deallocate columns_cursor

 

 

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

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

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

iOS 18 adds a new 'Recovered' album function to retrieve lost or damaged photos iOS 18 adds a new 'Recovered' album function to retrieve lost or damaged photos Jul 18, 2024 am 05:48 AM

Apple's latest releases of iOS18, iPadOS18 and macOS Sequoia systems have added an important feature to the Photos application, designed to help users easily recover photos and videos lost or damaged due to various reasons. The new feature introduces an album called "Recovered" in the Tools section of the Photos app that will automatically appear when a user has pictures or videos on their device that are not part of their photo library. The emergence of the "Recovered" album provides a solution for photos and videos lost due to database corruption, the camera application not saving to the photo library correctly, or a third-party application managing the photo library. Users only need a few simple steps

Detailed tutorial on establishing a database connection using MySQLi in PHP Detailed tutorial on establishing a database connection using MySQLi in PHP Jun 04, 2024 pm 01:42 PM

How to use MySQLi to establish a database connection in PHP: Include MySQLi extension (require_once) Create connection function (functionconnect_to_db) Call connection function ($conn=connect_to_db()) Execute query ($result=$conn->query()) Close connection ( $conn->close())

How to handle database connection errors in PHP How to handle database connection errors in PHP Jun 05, 2024 pm 02:16 PM

To handle database connection errors in PHP, you can use the following steps: Use mysqli_connect_errno() to obtain the error code. Use mysqli_connect_error() to get the error message. By capturing and logging these error messages, database connection issues can be easily identified and resolved, ensuring the smooth running of your application.

How to use database callback functions in Golang? How to use database callback functions in Golang? Jun 03, 2024 pm 02:20 PM

Using the database callback function in Golang can achieve: executing custom code after the specified database operation is completed. Add custom behavior through separate functions without writing additional code. Callback functions are available for insert, update, delete, and query operations. You must use the sql.Exec, sql.QueryRow, or sql.Query function to use the callback function.

Problem-Solving with Python: Unlock Powerful Solutions as a Beginner Coder Problem-Solving with Python: Unlock Powerful Solutions as a Beginner Coder Oct 11, 2024 pm 08:58 PM

Pythonempowersbeginnersinproblem-solving.Itsuser-friendlysyntax,extensivelibrary,andfeaturessuchasvariables,conditionalstatements,andloopsenableefficientcodedevelopment.Frommanagingdatatocontrollingprogramflowandperformingrepetitivetasks,Pythonprovid

The Key to Coding: Unlocking the Power of Python for Beginners The Key to Coding: Unlocking the Power of Python for Beginners Oct 11, 2024 pm 12:17 PM

Python is an ideal programming introduction language for beginners through its ease of learning and powerful features. Its basics include: Variables: used to store data (numbers, strings, lists, etc.). Data type: Defines the type of data in the variable (integer, floating point, etc.). Operators: used for mathematical operations and comparisons. Control flow: Control the flow of code execution (conditional statements, loops).

How to save JSON data to database in Golang? How to save JSON data to database in Golang? Jun 06, 2024 am 11:24 AM

JSON data can be saved into a MySQL database by using the gjson library or the json.Unmarshal function. The gjson library provides convenience methods to parse JSON fields, and the json.Unmarshal function requires a target type pointer to unmarshal JSON data. Both methods require preparing SQL statements and performing insert operations to persist the data into the database.

Unleash Your Inner Programmer: C for Absolute Beginners Unleash Your Inner Programmer: C for Absolute Beginners Oct 11, 2024 pm 03:50 PM

C is an ideal language for beginners to learn programming, and its advantages include efficiency, versatility, and portability. Learning C language requires: Installing a C compiler (such as MinGW or Cygwin) Understanding variables, data types, conditional statements and loop statements Writing the first program containing the main function and printf() function Practicing through practical cases (such as calculating averages) C language knowledge

See all articles