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隨機數(shù) - php mysql 帶查詢條件 獲取多條隨機記錄

php mysql 帶查詢條件的如何獲取多條隨機記錄

From [MySQLdiscussion group] 2017-04-17 16:25:24 0  2  744

mysql - 如何查詢一張表中各個用戶優(yōu)先級最高的模板

例如：表 user temp ranku1 a 2u1 b 0.5u1 c 3u2 aa 1.7u2 cc 3u3 dd 2我希望拿到u1，b {代碼...}

From [MySQLdiscussion group] 2017-04-17 15:28:12 0  2  744

如何備份10G以上的mysql數(shù)據(jù)庫

數(shù)據(jù)增長的非常快，現(xiàn)在已經(jīng)有2G了，過不了多久很可能超過10G，有沒有什么專業(yè)的工具，現(xiàn)在一直是用Navicat，mysqldump速度太慢了

From [MySQLdiscussion group] 2017-04-17 10:58:27 0  4  744

mysql - sql數(shù)據(jù)還原

執(zhí)行sql語句如下： {代碼...} 本來應(yīng)該是要執(zhí)行 {代碼...} 由于忘記了加條件，導(dǎo)致好十萬的數(shù)據(jù)全部狀態(tài)改錯了。有沒有辦法將之前的數(shù)據(jù)還原的，之前沒有做數(shù)據(jù)備份的??？（當然我是測試環(huán)境的數(shù)據(jù)。但是狀態(tài)不對...

From [MySQLdiscussion group] 2017-04-17 14:53:59 0  3  743

Update the contact_id column of each row with the same from_address to the maximum value

I have a database with a table called contacts that contains a list of customers, and a table called helpdesk_...

From [MySQLdiscussion group] 2023-09-16 17:40:45 0  1  742

mysql optimization - mysql innodb table lock problem

After testing, I found that the following situations will cause table locks 1.like 2.update,delete uncondition...

From [MySQLdiscussion group] 2017-05-24 11:32:59 0  2  742

How will the subsequent results of mysql order by subquery also be displayed in the result set?

How can the subsequent results of mysql order by subquery also be displayed in the result set? My mysql statem...

From [MySQLdiscussion group] 2017-05-18 10:55:42 0  1  742

mysql - 優(yōu)惠券表應(yīng)該怎么建，求幫助

優(yōu)惠券使用規(guī)則的表應(yīng)該怎么去建

From [MySQLdiscussion group] 2017-04-17 16:32:15 0  1  742

A guide to migrating a Drupal 9 database to a personal MySQL database

When I use a tool like PHPMyAdmin on my own server, the data currently being used with Drupal is of course enc...

From [MySQLdiscussion group] 2023-09-15 10:54:14 0  1  741

Execute all SQL queries in yii2 migration

I'm trying to do a migration that executes multiple queries on different tables simultaneously $sql='';$sql.=&...

From [MySQLdiscussion group] 2023-09-06 18:08:57 0  1  741

mysql - 根據(jù)一個字段查找另一個字段重復(fù)的數(shù)據(jù)？并刪除相同的記錄，保留其中一個。

根據(jù)一個字段查找另一個字段重復(fù)的數(shù)據(jù)？并刪除相同的記錄，保留其中一個。 數(shù)據(jù)庫表：product_code_relate_titletext 字段：id,search_id,product_code,raw_title ...

From [MySQLdiscussion group] 2017-04-17 16:16:10 0  3  741

node.js - nodejs中使用mysql如何存儲json格式數(shù)據(jù)

如題，如何存儲一個json數(shù)據(jù) db.query("INSERT table SET?",[params],callback) params 網(wǎng)頁一個application/json 格式數(shù)據(jù) jso...

From [MySQLdiscussion group] 2017-04-17 12:03:43 0  2  741

mysql - 時間類型DATE需要設(shè)置長度么？外鍵ID用vachar存儲長度設(shè)置多長合適呢？

時間類型DATE需要設(shè)置長度么？外鍵ID用vachar存儲長度設(shè)置多長合適呢？

From [MySQLdiscussion group] 2017-04-17 11:33:41 0  1  741

數(shù)據(jù)庫 - MySQL FOREIGN KEY 約束報錯：Can't create table 'outlook.orders' (errno: 150)

首先在我本機，和一臺linux服務(wù)器上執(zhí)行了一下同樣的SQL都是 Can't create table 'outlook.orders' (errno: 150) 這個錯誤軟件版本: 5.5.25a - MySQL Co...

From [MySQLdiscussion group] 2017-04-17 10:59:04 0  1  741

MYSQL用戶表分庫之后如何做連表查詢？

例如： 用戶account分庫之后 01_account 02_account ...我想在comment里把相關(guān)用戶的個人信息顯示出來，例如里顯示的聲望值。這樣的連表查詢怎么寫MYSQL語句？沒分表前我知道怎么做。謝謝

From [MySQLdiscussion group] 2017-04-17 10:58:10 0  3  741