在增加列值方面需要帮助 [英] need help in incrementing a column value

问题描述

大家好

Hi all

1   Manish  2012-09-24 16:46:12.037 1
3   nilam   2012-09-24 16:59:23.173 1
2   Dev     2012-09-24 17:04:22.907 1
1   Manish  2012-09-24 17:07:44.967 1
3   nilam   2012-09-24 17:09:38.950 1

我在上面的表格中..如您所见，同一个名字有2个条目..最后一个列是出席者.所以我想添加这些值.
例如为每个愿意加入的人添加

i m having the above table..as u can see the same name has 2 entries..the last colum is for attendence.so i want to add those values.
e.g. for each person it sould keep on add each time

推荐答案

请参阅以下解决方案.可能会对您有帮助.

Hi,

See the following solution. It might be help you.

IF (Select Count(ID) From Table_4 Where Name = 'Viprat') = 0
BEGIN
    Insert Into Table_4 (Name, Attendance)
    Values ('Viprat',1)
END
ELSE
BEGIN
    Update Table_4
    SET
        Attendance = Attendance + 1
    Where Name = 'Viprat'
END

您可以这样插入.

谢谢，
Viprat

You can insert like this.

Thanks,
Viprat

尝试一下

SELECT NAME,COUNT(NAME) FROM TABLE_NAME 
GROUP BY NAME;

最好在count和group by语句中使用主键.

像这样

better to use primary key in the count and group by statement.

Like this

SELECT USER_ID,NAME,COUNT(PK_ID_OF_SEARCHING_TABLE) FROM TABLE_NAME 
GROUP BY USER_ID;

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