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linux - mysql數(shù)據(jù)庫(kù)的timestamp為什么從1970到2038的某一時(shí)間？某一時(shí)間是指什么時(shí)間？過了這個(gè)時(shí)間之后怎么辦？

如題。1 mysql數(shù)據(jù)庫(kù)的timestamp為什么從1970到2038的某一時(shí)間？2某一時(shí)間是指什么時(shí)間？3過了這個(gè)時(shí)間之后怎么辦？

From [MySQLdiscussion group] 2017-04-17 13:47:02 0  3  788

After installing MySQL, how to activate the federation engine?

我有mysql5.1.44:mysql>showengines;+------------+---------+|Engine|Support|+------------+---------+|ndbcluster...

From [MySQLdiscussion group] 2023-10-18 08:51:44 0  2  787

Index - Ask about joint query of large data volume in Mysql

Now there is table A, which stores the core and busiest data of the entire business line. The approximate amou...

From [MySQLdiscussion group] 2017-05-18 10:56:39 0  1  787

mysql - 問一個(gè)簡(jiǎn)單的數(shù)據(jù)表設(shè)計(jì)問題（多對(duì)一、一對(duì)多）？

舉個(gè)栗子：現(xiàn)在有三張表：食材、灶具、食品 業(yè)務(wù)場(chǎng)景：選購(gòu)某些食材，通過某種灶具，做成了一些食品。（取蔥花、面粉->用平底鍋->烙了白面餅和蔥花餅） 用數(shù)據(jù)庫(kù)關(guān)系描述：用數(shù)據(jù)庫(kù)正常描述是這樣的：...

From [MySQLdiscussion group] 2017-04-17 16:06:15 0  2  787

MySQL trigger statement fails on variable assignment

The following is the definition of the patient table: PatientstableColumns:PatientIdintAIPKFirstNamelongtextLa...

From [MySQLdiscussion group] 2024-04-02 15:58:14 0  1  786

Unable to access MySQL, error code 1045 (28000): Access is denied for user 'bill'@'localhost' (using password: yes)

Let me first mention that I have looked at many of the suggested questions and found no relevant answers. Here...

From [MySQLdiscussion group] 2023-09-17 09:21:55 0  2  786

Windows - How to call mysql after asp.net is connected? For example, how to implement the following login verification function?

The database table only has two columns: username and password. {code...}

From [MySQLdiscussion group] 2017-06-06 09:52:04 0  1  786

請(qǐng)問mysql innodb的非自增ID主鍵的效率？

table：news_id user_id {代碼...} 這種情況下效率有多少影響？

From [MySQLdiscussion group] 2017-04-17 13:45:45 0  1  786

mysql - virtualbox虛擬機(jī)里的程序如何連接到宿主機(jī)里的數(shù)據(jù)庫(kù)

環(huán)境 宿主機(jī)：ubuntu 14.04 64bit virtualbox64bit 虛擬機(jī)：win8.1 64 bit 網(wǎng)絡(luò)連接方案：自動(dòng)地址轉(zhuǎn)換：NAT 問題 ubuntu里安裝過了mysql，不想在win 再安裝一次...

From [MySQLdiscussion group] 2017-04-17 11:57:06 0  1  786

Throws new ResourceNotFoundError(id) for non-existent id n

I'm building a small full stack system (typescript, express, NodeJs) and in one of the routes where the user c...

From [MySQLdiscussion group] 2023-09-13 16:13:55 0  1  785

mysql replace deadlock

Hello everyone, I have encountered a problem and would like to ask everyone for help. I now have a business ta...

From [MySQLdiscussion group] 2017-06-06 09:52:12 0  2  785

mysql優(yōu)化 - mysql KEY是什么鍵？有什么作用？

1.表 CREATE TABLE jforum_posts (post_id int(11) NOT NULL AUTO_INCREMENT,topic_id int(11) NOT NULL DEFAULT '0',f...

From [MySQLdiscussion group] 2017-04-17 14:58:50 0  3  785

How to solve "subquery returns more than 1 row" error

I have a query that returns multiple rows, and another query where I want to set the condition to be any one o...

From [MySQLdiscussion group] 2023-08-21 17:36:57 0  2  784

mysql - 一個(gè)sql查詢的題目，望路過大神看下

1.上圖兩個(gè)表，要求找出掌握Skills中全部3個(gè)技能的員工，即神崎和相田，要求用mysql的語(yǔ)句實(shí)現(xiàn) 2.剛學(xué)sql，不是很會(huì)，想了好久 3.下面是書里面用sql server寫的，我也不是很理解，另外mysql中沒有...

From [MySQLdiscussion group] 2017-04-17 15:52:17 0  6  784

為什么mysql的int占四個(gè)字節(jié)？

他的表示范圍很大，400000多，那這樣算的話一個(gè)數(shù)字就一個(gè)字節(jié)，為怎么都會(huì)說他只占4個(gè)字節(jié)呢。

From [MySQLdiscussion group] 2017-04-17 13:26:52 0  1  784