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Node.js 使用';添加多个输入以查询MS SQL Server实例;节点mssql';npm包_Node.js_Sql Server_Express_Tedious_Node Mssql - Fatal编程技术网

Node.js 使用';添加多个输入以查询MS SQL Server实例;节点mssql';npm包

Node.js 使用';添加多个输入以查询MS SQL Server实例;节点mssql';npm包,node.js,sql-server,express,tedious,node-mssql,Node.js,Sql Server,Express,Tedious,Node Mssql,我想查询MS SQL Server实例以提供一个非常简单的POST请求。我正在使用nodejs+express。以下代码(异步版本)仅考虑第一个输入类型,因此返回错误- let pool = await sql.connect(dbCredentials); let bookName = "string to be matched" ; let ranksVal= 10 let result = await pool .request()

我想查询MS SQL Server实例以提供一个非常简单的
POST
请求。我正在使用nodejs+express。以下代码(异步版本)仅考虑第一个
输入类型,因此返回错误-

  let pool = await sql.connect(dbCredentials);
  let bookName = "string to be matched" ; 
  let ranksVal= 10
  
  let result = await pool
    .request()
    .input("item", sql.VarChar, bookName)
    .input("ranksVal", sql.Int , ranksVal)
    .query(`select top @ranksVal * from dbTable where book = @item order by counts desc`);
理想情况下,上述代码应该为以下SQL查询返回一个结果:

 select top 10 * from dbTable where book = "string to be matched" order by counts desc
或者,以下解决方案也可以工作:

  let result = await pool
    .request()
    .input("item", sql.VarChar, bookName)
    .query(`select top ${ranksVal} * from dbTable where book = @item order by counts desc`);
但我想了解如何将多个值传递给
req.input()
方法。
谢谢。

要在TOP values子句中使用表达式或参数,必须使用括号。乙二醇

 .query(`select top (@ranksVal) * from dbTable where book = @item order by counts desc`);