MySQL：选择指定点之间的所有数据

Question

I have a mysql tables with data connected to points. like this:

tbl_user

tbl_earned_points

tbl_used_points

I have a mysql query that select data of available points. This is the query:

SELECT
user.user_email_id AS userEmailId,
IFNULL(SUM(earn_points.earned_points),0) AS lifeTimePoints,
IFNULL((SUM(earn_points.earned_points) - (SELECT IFNULL(SUM(used_points.points_used),0) FROM tbl_used_points AS used_points WHERE used_points.user_id=earn_points.user_id)),0) AS availablePoints
FROM tbl_earned_points AS earn_points
RIGHT JOIN tbl_user AS user ON earn_points.user_id=user.user_id WHERE user.user_email_id <> '' AND user.user_email_id <> '0'
GROUP BY user.user_email_id
ORDER BY availablePoints ASC

From above query i am getting all emails & result like

userEmailId              lifeTimePoints     availablePoints
samal07@gmail.com        1745               1500
mistyorr_20@yahoo.com    100                75
bsfar@yahoo.com          85                 85
tgray@gmail.com          94                 90
lori_bag@yahoo.com       547                450

My problem is that I only need to get the rows availablePoints between 80 TO 99 .

So my query would result like

 userEmailId        lifeTimePoints      availablePoints
 bsfar@yahoo.com        85              85
 tgray@gmail.com        94              90

Answer 1

只需将其添加到您的WHERE子句中：

AND availablePoints BETWEEN 80 AND 99

Answer 2

you can use BETWEEN clause for availablePoints . Set your availablePoints whatever you want.

Answer 3

Essentially you just need to add WHERE criteria. However, you can also rewrite your query to remove the correlated subquery and just use OUTER JOINs :

SELECT  u.user_email,
    COALESCE(e.points,0) lifeTimePoints,
    COALESCE(a.points,0) availablePoints
FROM tbl_user AS u
    LEFT JOIN (
        SELECT SUM(earned_points) points, user_id
        FROM tbl_earned_points
        GROUP BY user_id
    ) e ON u.user_id = e.user_id
    LEFT JOIN (
        SELECT SUM(points_used) points, user_id
        FROM tbl_used_points 
        GROUP BY user_id
    ) a ON u.user_id = a.user_id
WHERE a.points between 80 and 99

If you'd prefer to use your existing query, you'll either need to wrap it in a subquery and use the column alias ( availablepoints ), or you'll need to use the entire IFNULL statement in your WHERE criteria. You cannot reference the column alias directly.