SQL创建的几种存储过程
表名和比较字段可以做参数的存储过程
创建存储过程
表名和比较字段可以做参数的存储过程
Create PROCEDURE sp_getTeacherInfo
@TblName nvarchar(30), -- 表名
@CmpStr nvarchar(30), -- 参与比较的值
@TblAtr nvarchar(30) -- 参与比较的字段
AS
DECLARE @sql varchar(4000)
SET @sql = 'select * from ' + @TblName + ' where ' + @TblAtr + '=' + @CmpStr
EXEC (@sql)
表 tbl_TeacherInfo
Exec sp_getTeacherInfo 'tbl_TeacherInfo','TeaNo', '07417502'
// 注意:像这样的调用是错误的
还原成查询语句
select * from tbl_TeacherInfo where TeaNo = 07417502
之所以没报错,是因为参数'07417502'被误认为了 整型,进行了整数的比较
Exec sp_getTeacherInfo 'tbl_TeacherInfo','Name','楚留香'
// 报错
还原成查询语句
select * from tbl_TeacherInfo where TeaNo = 楚留香
// 显然是错误的
正确的调用方法
Exec sp_getTeacherInfo 'tbl_TeacherInfo','Name',"'楚留香' "
还原成查询语句
select * from tbl_TeacherInfo where TeaNo = '楚留香'
常规存储过程的创建
Create PROCEDURE sp_AddRowToLogin
@TeaNo nvarchar(100), -- 比较字段
@TeaName nvarchar(100) -- 比较字段
AS
insert into tbl_UserLogin values(@TeaNo,@TeaName,@TeaNo,0)
除了指定列其他列都返回的存储过程
CREATE PROCEDURE sp_Alter
@TblName nvarchar(30) -- 表名
AS
declare @sql varchar(1000)
select @sql='select '
select @sql=@sql+name+',' from syscolumns where id=object_id(@TblName) and name not in ('ID','TeaNo')
select @sql=left(@sql,len(@sql)-1)
select @sql=@sql+' from ' + @TblName
exec (@sql)
// 除了ID和TeaNo两列不返回,其他都返回

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

AI Hentai Generator
Generate AI Hentai for free.

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

HQL and SQL are compared in the Hibernate framework: HQL (1. Object-oriented syntax, 2. Database-independent queries, 3. Type safety), while SQL directly operates the database (1. Database-independent standards, 2. Complex executable queries and data manipulation).

"Usage of Division Operation in OracleSQL" In OracleSQL, division operation is one of the common mathematical operations. During data query and processing, division operations can help us calculate the ratio between fields or derive the logical relationship between specific values. This article will introduce the usage of division operation in OracleSQL and provide specific code examples. 1. Two ways of division operations in OracleSQL In OracleSQL, division operations can be performed in two different ways.

Oracle and DB2 are two commonly used relational database management systems, each of which has its own unique SQL syntax and characteristics. This article will compare and differ between the SQL syntax of Oracle and DB2, and provide specific code examples. Database connection In Oracle, use the following statement to connect to the database: CONNECTusername/password@database. In DB2, the statement to connect to the database is as follows: CONNECTTOdataba

What is Identity in SQL? Specific code examples are needed. In SQL, Identity is a special data type used to generate auto-incrementing numbers. It is often used to uniquely identify each row of data in a table. The Identity column is often used in conjunction with the primary key column to ensure that each record has a unique identifier. This article will detail how to use Identity and some practical code examples. The basic way to use Identity is to use Identit when creating a table.

Interpretation of MyBatis dynamic SQL tags: Detailed explanation of Set tag usage MyBatis is an excellent persistence layer framework. It provides a wealth of dynamic SQL tags and can flexibly construct database operation statements. Among them, the Set tag is used to generate the SET clause in the UPDATE statement, which is very commonly used in update operations. This article will explain in detail the usage of the Set tag in MyBatis and demonstrate its functionality through specific code examples. What is Set tag Set tag is used in MyBati

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

Solution: 1. Check whether the logged-in user has sufficient permissions to access or operate the database, and ensure that the user has the correct permissions; 2. Check whether the account of the SQL Server service has permission to access the specified file or folder, and ensure that the account Have sufficient permissions to read and write the file or folder; 3. Check whether the specified database file has been opened or locked by other processes, try to close or release the file, and rerun the query; 4. Try as administrator Run Management Studio as etc.

How to use SQL statements for data aggregation and statistics in MySQL? Data aggregation and statistics are very important steps when performing data analysis and statistics. As a powerful relational database management system, MySQL provides a wealth of aggregation and statistical functions, which can easily perform data aggregation and statistical operations. This article will introduce the method of using SQL statements to perform data aggregation and statistics in MySQL, and provide specific code examples. 1. Use the COUNT function for counting. The COUNT function is the most commonly used
