排序
SELECT
obj.user_id,obj.score,@rownum := @rownum + 1 AS rownum
FROM
(
SELECT
user_id,
score
FROM
`sql_rank`
ORDER BY
score DESC
) AS obj,
(SELECT @rownum := 0) r
有重复
SELECT
obj.user_id,
obj.score,
CASE
WHEN @rowtotal = obj.score THEN
@rownum
WHEN @rowtotal := obj.score THEN
@rownum :=@rownum + 1
WHEN @rowtotal = 0 THEN
@rownum :=@rownum + 1END AS rownum
FROM
(
SELECT
user_id,
score
FROM
`sql_rank`
ORDER BY
score DESC
) AS obj,
(SELECT @rownum := 0 ,@rowtotal := NULL) r
C# 运行上面程序时会异常 需要 dbconfig + ";Allow User Variables=True;" 进行处理
