Question

我有这个查询表中的数据插入列表现在我想避免插入重复记录我怎么能在我的代码中做到这一点？

请帮帮我

-- Create a table type to match your input parameters
CREATE TYPE IdNameTable AS TABLE 
( ID INT, Name NVARCHAR(50) );
GO

-- change your stored procedure to accept such a table type parameter
ALTER PROCEDURE [dbo].[Register]
    @Values IdNameTable READONLY
AS
BEGIN
    BEGIN TRY
        INSERT INTO dbo.Group (Id, Name) 
          -- get the values from the table type parameter
          SELECT 
             Id, Name
          FROM
             @Values

        SELECT 0
    END TRY
    BEGIN CATCH
        SELECT -1
    END CATCH
END
GO

Answer 1

尝试这种方式：

INSERT INTO dbo.Group (Id, Name) 
SELECT 
  Id, Name
FROM
  @Values
WHERE 
  ID NOT IN (select ID from Group)

完整代码：

-- Create a table type to match your input parameters
CREATE TYPE IdNameTable AS TABLE 
( ID INT, Name NVARCHAR(50) );
GO

-- change your stored procedure to accept such a table type parameter
ALTER PROCEDURE [dbo].[Register]
    @Values IdNameTable READONLY
AS
BEGIN
    BEGIN TRY

        INSERT INTO dbo.Group (Id, Name) 
        SELECT 
           Id, Name
        FROM
           @Values
        WHERE 
           ID NOT IN (select ID from Group)

        SELECT 0
    END TRY
    BEGIN CATCH
        SELECT -1
    END CATCH
END
GO

Answer 2

我使用NOT EXISTS来检查dbo.Group表中是否有ID，并且只有在找不到匹配项时才插入。假设ID是唯一的。请根据需要将Not EXISTS内的过滤器修改为tiler。希望它有所帮助

CREATE TYPE IdNameTable AS TABLE 
(ID INT, NAME NVARCHAR(50));
GO

-- change your stored procedure to accept such a table type parameter
ALTER PROCEDURE [dbo].[Register]
    @Values IdNameTable READONLY
AS
BEGIN
    BEGIN TRY
        INSERT INTO dbo.Group (Id,NAME)
        -- get the values from the table type parameter
        SELECT   v.Id,
                 v.NAME
        FROM     @Values v
        WHERE NOT EXISTS (SELECT 1 FROM dbo.Group gp WHERE gp.id=v.id)

        SELECT   0
    END TRY
    BEGIN CATCH
        SELECT   -1
    END CATCH
END
GO

Answer 3

最简单的方法是在创建表格时向字段添加唯一约束创建表tble_Name （ ID int identity（1,1），名称nvarchar（50）唯一 Null ）当您输入记录时，查询应防止重复记录

Answer 4

CREATE TYPE IdNameTable AS TABLE 
(ID INT, NAME NVARCHAR(50));
GO

-- change your stored procedure to accept such a table type parameter
ALTER PROCEDURE [dbo].[Register]
    @Values IdNameTable READONLY
AS
BEGIN
    BEGIN TRY
        INSERT INTO dbo.Group (Id,NAME)
        -- get the values from the table type parameter
        SELECT   v.Id,
                 v.NAME
        FROM     @Values v
        WHERE NOT EXISTS (SELECT 1 FROM dbo.Group gp WHERE gp.id=v.id)

        SELECT   0
    END TRY
    BEGIN CATCH
        SELECT   -1
    END CATCH
END
GO

如何避免在表类型sql server中插入重复记录

4 个答案: