必须声明标量变量 - 设置变量等于 SELECT 语句答案

【问题标题】：Must declare the scalar variable - Setting variable equal to a SELECT statement必须声明标量变量 - 设置变量等于 SELECT 语句
【发布时间】：2017-05-23 22:08:35
【问题描述】：

我想将 @inputData 设置为 select 语句的行，然后将其传递给我的 DoSomething 存储过程：

DECLARE @inputData [dbo].[TestTableType];

SET @inputData = ( 
    SELECT
        1 AS Client_Id,
        20170202 AS a,
        18595 AS b,
        49.82 AS c,
        88 AS d,
        31 AS e,
        0.67 AS f,
        0 AS g,
        44 AS h,
        1827 AS i,
        5 AS j,
        87 AS k
);

EXEC DoSomething @inputData;

但我收到此错误：

消息 137，第 16 级，状态 1，第 3 行
必须声明标量变量“@inputData”。

我做错了什么？

【问题讨论】：

注意，可以试试insert into @inputData select ...
感谢@user1429080 完美运行！

标签： sql-server stored-procedures

【解决方案1】：

您没有SET 表变量。你INSERT进入他们：

INSERT INTO @inputData /* Should have column list here also */
SELECT
        1 AS Client_Id,
        20170202 AS a,
        18595 AS b,
        49.82 AS c,
        88 AS d,
        31 AS e,
        0.67 AS f,
        0 AS g,
        44 AS h,
        1827 AS i,
        5 AS j,
        87 AS k
;

【讨论】：

【解决方案2】：

尝试使用 INSERT INTO。把表类型想象成一个临时表（基本上就是这样）。

DECLARE @inputData AS TestTableType

INSERT INTO @inputData 
SELECT
    1 AS Client_Id,
    20170202 AS a,
    18595 AS b,
    49.82 AS c,
    88 AS d,
    31 AS e,
    0.67 AS f,
    0 AS g,
    44 AS h,
    1827 AS i,
    5 AS j,
    87 AS k
);

【讨论】：

我似乎遇到了同样的问题。平心而论，我的用户定义表类型实际上称为 dbo.TestTableType