mssql存储过程表名和字段名为变量的实现方法
mssql存储过程表名和字段名为变量的实现方法,需要的朋友可以参考下。
没有使用动态语句直接报错错误的
代码如下:
alter proc testpapers
as
begin
declare @tems nvarchar(max),@zidaun nvarchar(max)
set @tems=select * from @tems order by @zidaun
exec(@tems)
end
exec testpapers
消息 156,级别 15,状态 1,过程 testpapers,第 1 行
关键字 'select' 附近有语法错误。
消息 1087,级别 15,状态 2,过程 testpapers,第 1 行
必须声明表变量 "@tems"。
首先要让表名或者字段为变量则要用到动态语句
错误的
代码如下:
alter proc testpapers
as
begin
declare @tems nvarchar(max),@zidaun nvarchar(max)
set @tems='select * from @tems order by @zidaun ';
exec(@tems)
end
exec testpapers
消息 1087,级别 15,状态 2,第 1 行
必须声明表变量 "@tems"。
将表名和字段名写到exec里边
正确的
代码如下:
alter proc testpapers
as
begin
declare @startRow nvarchar(max),@tems nvarchar(max),@zidaun nvarchar(max)
set @startRow='temp'
set @tems='select * from ';
set @zidaun='p_id';
exec(@tems+@startRow+' order by '+@zidaun)
end
exec testpapers

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











Environment variables are the path to the location (or environment) where applications and programs run. They can be created, edited, managed or deleted by the user and come in handy when managing the behavior of certain processes. Here's how to create a configuration file to manage multiple variables simultaneously without having to edit them individually on Windows. How to use profiles in environment variables Windows 11 and 10 On Windows, there are two sets of environment variables – user variables (apply to the current user) and system variables (apply globally). However, using a tool like PowerToys, you can create a separate configuration file to add new and existing variables and manage them all at once. Here’s how: Step 1: Install PowerToysPowerTo

Title: Steps and Precautions for Implementing Batch Updates by Oracle Stored Procedures In Oracle database, stored procedures are a set of SQL statements designed to improve database performance, reuse code, and enhance security. Stored procedures can be used to update data in batches. This article will introduce how to use Oracle stored procedures to implement batch updates and provide specific code examples. Step 1: Create a stored procedure First, we need to create a stored procedure to implement batch update operations. The following is how to create a stored procedure

Strict mode was introduced in PHP7, which can help developers reduce potential errors. This article will explain what strict mode is and how to use strict mode in PHP7 to reduce errors. At the same time, the application of strict mode will be demonstrated through code examples. 1. What is strict mode? Strict mode is a feature in PHP7 that can help developers write more standardized code and reduce some common errors. In strict mode, there will be strict restrictions and detection on variable declaration, type checking, function calling, etc. Pass

MySQL methods for deleting stored procedures include using the DROP PROCEDURE statement, using MySQL Workbench, and using command line tools. Detailed introduction: 1. Use the DROP PROCEDURE statement. The steps are to first open the MySQL client or use any tool that supports MySQL, then connect to your MySQL database, and finally execute the following SQL statement to delete the stored procedure; 2. Use MySQL Workbench to delete Stored procedures and so on.

Using Ajax to obtain variables from PHP methods is a common scenario in web development. Through Ajax, the page can be dynamically obtained without refreshing the data. In this article, we will introduce how to use Ajax to get variables from PHP methods, and provide specific code examples. First, we need to write a PHP file to handle the Ajax request and return the required variables. Here is sample code for a simple PHP file getData.php:

Python is widely used in a wide range of fields with its simple and easy-to-read syntax. It is crucial to master the basic structure of Python syntax, both to improve programming efficiency and to gain a deep understanding of how the code works. To this end, this article provides a comprehensive mind map detailing various aspects of Python syntax. Variables and Data Types Variables are containers used to store data in Python. The mind map shows common Python data types, including integers, floating point numbers, strings, Boolean values, and lists. Each data type has its own characteristics and operation methods. Operators Operators are used to perform various operations on data types. The mind map covers the different operator types in Python, such as arithmetic operators, ratio

Stored procedures in Oracle database are a specific type of stored procedures used to execute a series of SQL statements and data operations in the database. In actual database development work, sometimes we need to determine whether a certain table exists in the database, so that we can do some judgment and logical processing in the storage process. Below we will introduce how to implement the method of determining whether a table exists in Oracle database, and provide specific code examples. First, we can use the system table user_tables or all_t

Implementation Principles and Applications of Golang Stored Procedures Stored procedures are precompiled programs that are stored in relational databases and can be called by applications. They can effectively reduce the cost of network transmission of data and improve the execution efficiency of the database. Although Golang does not directly support stored procedures, you can simulate the functions of stored procedures by using SQL statements. This article will introduce the principles and applications of implementing stored procedures in Golang, and provide specific code examples. 1. The implementation principle of Golang stored procedure is in Gol
