如何使用 unix 时间戳获取最近 24 小时的记录
How to fetch last 24 hour record using unix timestamps
我在 MySQL 中有两个 table,我想获取评论的名称和数量。我该怎么做?
这是我的 table un_users
:
id wallet_address username
1 xxxxxxxxxxxxxx abc
2 xxxxxxxxxxxxxx xyz
3 xxxxxxxxxxxxxx def
4 xxxxxxxxxxxxxx jkl
这是我的 table coin_review
:
id wallet_address review review_creation_time
1 xxxxxxxxxxxxx Lorem Ipsum1 1632812650
2 xxxxxxxxxxxxx Lorem Ipsum2 1632812211
3 xxxxxxxxxxxxx Lorem Ipsum3 1632812650
4 xxxxxxxxxxxxx Lorem Ipsum4 1632814574
我试过以下代码但没有用:
SELECT u.username, COUNT(c.Review) AS totalreview
FROM un_users u
LEFT JOIN coin_review c ON c.wallet_address = u.wallet_address
GROUP BY u.username
ORDER BY u.username
我想知道如何获取“最近 24 小时”的记录?
假设review_creation_time是一个unix时间戳,你可以使用UNIX_TIMESTAMP()
函数来比较:
SELECT
u.id, u.wallet_address, u.username,
COUNT(c.id) AS review_count
FROM un_users u
JOIN coin_review c ON c.wallet_address = u.wallet_address
WHERE c.review_creation_time > UNIX_TIMESTAMP(CURRENT_TIMESTAMP - INTERVAL 24 HOUR)
AND c.review_creation_time <= UNIX_TIMESTAMP()
GROUP BY u.id
我在 MySQL 中有两个 table,我想获取评论的名称和数量。我该怎么做?
这是我的 table un_users
:
id wallet_address username
1 xxxxxxxxxxxxxx abc
2 xxxxxxxxxxxxxx xyz
3 xxxxxxxxxxxxxx def
4 xxxxxxxxxxxxxx jkl
这是我的 table coin_review
:
id wallet_address review review_creation_time
1 xxxxxxxxxxxxx Lorem Ipsum1 1632812650
2 xxxxxxxxxxxxx Lorem Ipsum2 1632812211
3 xxxxxxxxxxxxx Lorem Ipsum3 1632812650
4 xxxxxxxxxxxxx Lorem Ipsum4 1632814574
我试过以下代码但没有用:
SELECT u.username, COUNT(c.Review) AS totalreview
FROM un_users u
LEFT JOIN coin_review c ON c.wallet_address = u.wallet_address
GROUP BY u.username
ORDER BY u.username
我想知道如何获取“最近 24 小时”的记录?
假设review_creation_time是一个unix时间戳,你可以使用UNIX_TIMESTAMP()
函数来比较:
SELECT
u.id, u.wallet_address, u.username,
COUNT(c.id) AS review_count
FROM un_users u
JOIN coin_review c ON c.wallet_address = u.wallet_address
WHERE c.review_creation_time > UNIX_TIMESTAMP(CURRENT_TIMESTAMP - INTERVAL 24 HOUR)
AND c.review_creation_time <= UNIX_TIMESTAMP()
GROUP BY u.id