Question

这是存储过程：

CREATE PROCEDURE [dbo].[sp_Login]
        @Email nvarchar(50),
        @Password nvarchar(50),
        @UserId uniqueidentifier output,
        @UserType int output,
        @IsVerify bit output,
        @IsPremium bit output
    AS
    BEGIN
        SELECT @UserId = UserId FROM Users WHERE Email = @Email AND [Password] = @Password
        SELECT @IsVerify = IsVerify FROM Users WHERE Email = @Email AND [Password] = @Password
        SELECT @UserType = UserType FROM Users WHERE Email = @Email AND [Password] = @Password
        SELECT @IsPremium = IsPremium FROM Users WHERE Email = @Email AND [Password] = @Password
    END

我的问题是：有办法将此参数作为“输出”返回，而不会调用相同的“选择”功能4次。

Answer 1

您应该对所有参数使用一个选择，如下所示：

CREATE PROCEDURE [dbo].[sp_Login]
        @Email nvarchar(50),
        @Password nvarchar(50),
        @UserId uniqueidentifier output,
        @UserType int output,
        @IsVerify bit output,
        @IsPremium bit output
    AS
    BEGIN
        SELECT @UserId    = UserId,
               @IsVerify  = IsVerify,
               @UserType  = UserType,
               @IsPremium = IsPremium 
        FROM  Users 
        WHERE Email = @Email 
        AND   [Password] = @Password
    END

Answer 2

你可以使用像

这样的单一选择语句

        SELECT @UserId = UserId ,
               @IsVerify = IsVerify ,
               @UserType = UserType ,
              @IsPremium = IsPremium 
        FROM Users WHERE Email = @Email AND Password = @Password

从同一个表中的存储过程返回多个数据

2 个答案: