[英]How to create SQL procedure to select dynamic column from dynamic table where dynamic table
我需要創建程序來從動態數據中選擇動態列,其中動態值
Craete procedure SelectColumn
@tableName NVARCHAR(MAX),
@id int,
@ColumnName NVARCHAR(MAX)
as
begin
DECLARE @SQLString1 NVARCHAR(MAX)
SET @SQLString1= 'Select '+ @ColumnName + ' From ' + @TableName +' where id= '+@id
print @SQLString1
EXEC (@SQLString1)
end
執行時顯示此錯誤
將 nvarchar 值“Select Email From Member where id=”轉換為數據類型 int 時轉換失敗。
when delete where id= '+@id and set 'where id=1'
過程成功,但我需要使用where id=@id
。
試試這個CAST(@id AS VARCHAR)
SET @SQLString1= 'Select '+ @ColumnName + ' From ' + @TableName +' where id= '+CAST(@id AS VARCHAR)
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