Question

我想在mysql中编写存储过程，我想在其中添加“where子句” 动态我写了Sp但是给了它一个错误请帮忙

CREATE PROCEDURE GetStudent(
  @Center varchar(20)=null,
  @Gender varchar(20) = null,
  @yrOf10 date= null,
@Designation varchar(20)= null,)
AS DECLARE @Query VARCHAR(100);DECLARE @ParamDefinition NVARCHAR(2000);

SET @Query = ' SELECT * FROM Student WHERE 1=1';IF @Center IS NOT NULL
     SET @Query = @Query + ' AND Center= @Center ';IF @Gender IS NOT NULL         SET @Query = @Query + ' AND Gender=@Gender  ';IF @yrOf10 IS NOT NULL   SET @Query = @Query + ' AND yrOfPassing10=@yrOf10   ';IF @Designation IS NOT NULL    SET @Query = @Query + ' AND Designation=@Designation';

Answer 1

您无法在对象名称http://dev.mysql.com/doc/refman/5.0/en/identifiers.html中使用@符号。

我不知道你为什么要用@作为前缀。你是从MS SQL开始的吗？

无论如何要对本地变量进行decalre，请使用DECLARE http://dev.mysql.com/doc/refman/5.0/en/declare-local-variable.html

如何编写过程在mysql中动态添加where子句

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