亚洲国产日韩欧美一区二区三区,精品亚洲国产成人av在线,国产99视频精品免视看7,99国产精品久久久久久久成人热,欧美日韩亚洲国产综合乱

mysql的insert語句怎么插入當(dāng)前時間？

mysql的insert語句怎么插入當(dāng)前時間？ 比如有一張表users，有id,name,eamil,password,created_at,updated_at字段。我想插入一條數(shù)據(jù)，這樣寫： {代碼...} 問題：1...

From [MySQLdiscussion group] 2017-04-17 16:36:33 0  4  1124

PGP critical issue when trying to install mysql2 in rails project

I'm trying to install all the gems of a Rails project locally. I have a problem with mysql2. When I try to ins...

From [MySQLdiscussion group] 2023-09-01 23:57:11 0  1  1123

php - Operation problems after the registration verification email expires

Regarding the issue of registration verification email, my idea is as follows: Add the status field to the dat...

From [MySQLdiscussion group] 2017-06-30 09:52:35 0  3  1123

javascript - Access denied for user 'root'@'localhost' (using password: YES)

Connect to mysql through the terminal in mac. The connection is successful through the graphical tool Navicat....

From [MySQLdiscussion group] 2017-06-12 09:20:35 0  3  1122

將SQLServer數(shù)據(jù)同步到MySQL 用什么方法？

目的：將 SQLServer 數(shù)據(jù)表里的數(shù)據(jù)自動同步到 MySQL 的數(shù)據(jù)表里。環(huán)境：兩個數(shù)據(jù)庫分別在兩臺服務(wù)器上；SQLServer表名為 tb1, MySQL表名為 tb2同步方法：1、實(shí)時同步：在 SQLServe...

From [MySQLdiscussion group] 2017-04-17 15:25:00 0  2  1122

sql常用語法請教

1.表結(jié)構(gòu)已經(jīng)有，字段也已經(jīng)有，為字段添加comment備注信息的SQL ，該如何寫？修改字段的comment的SQL ，又該如何寫？2.表結(jié)構(gòu)已經(jīng)有，字段也已經(jīng)有，修改表名comment的sql ，該如何寫？

From [MySQLdiscussion group] 2016-11-17 15:26:19 0  1  1122

php - How to count the QR code of the mini program at the bottom of the official account article?

Our official account is bound to a mini program. Every time we write an article, the QR code of our mini progr...

From [MySQLdiscussion group] 2017-05-24 11:33:00 0  2  1120

"Uncaught mysqli_sql_exception: The command is out of sync; you cannot run this command now" when updating to php8.2.5 from an older PHP version

I have a mysqli wrapper for PHP5 that I wrote years ago but I get an error when trying to run it on PHP8.2.5. ...

From [MySQLdiscussion group] 2024-01-16 14:25:42 0  1  1119

Keycloak 18: Guide to setting up a database migration strategy manually

According to the Keycloak documentation - Upgrade section (Upgrade), using --spi-connections-jpa-default-migra...

From [MySQLdiscussion group] 2024-03-26 11:55:26 0  1  1117

數(shù)據(jù)庫 - MySQL中刪除帶有索引的字段后，索引會自動刪除么？

MySQL表中加一個字段并添加了Index索引，現(xiàn)在把字段刪除后對該字段的索引是否還存在？若存在，后期要怎么刪除該索引？ 附上執(zhí)行的sql語句: {代碼...}

From [MySQLdiscussion group] 2017-04-17 11:25:54 0  1  1117

delete - mysql innodb引擎 按照非唯一索引刪除內(nèi)容時 導(dǎo)致整個mysql實(shí)例變慢，所有表增、刪、改、查全部變慢

定時任務(wù)清理一個大表大概有4000W左右的數(shù)據(jù)量,每天定時按照 delete from tableXX where date='2015-09-08' date varchar 字段有索引，刪除數(shù)據(jù)量百萬級 導(dǎo)致整個db...

From [MySQLdiscussion group] 2017-04-17 13:15:01 0  1  1116

mysql 一個sql 返回多個總數(shù)

文章鏈接：https://.com/a/11...說道：一個sql 返回多個總數(shù)$sql = "select count(*) all, " ;$sql .= " count(case wh...

From [MySQLdiscussion group] 2017-04-17 16:08:37 0  3  1115

mysql - 數(shù)據(jù)庫表之間設(shè)置外鍵是否可以提高查詢效率？

我們知道，設(shè)置主鍵、唯一索引可以提高查詢效率，但設(shè)置外鍵約束可以提高查詢效率嗎？外鍵約束除了用來防止數(shù)據(jù)不正確外，是否可以提高查詢效率？現(xiàn)在我們項目中很多時候只是在代碼里面通過業(yè)務(wù)進(jìn)行關(guān)聯(lián)，數(shù)據(jù)庫...

From [MySQLdiscussion group] 2017-04-17 16:08:22 0  7  1114

關(guān)于mysql grant權(quán)限語句的報錯問題

我用 mysql -u root -p登陸進(jìn)去敲入命令grant all on . to ja identified by '123' with grant option;提示Query OK, 0 rows affec...

From [MySQLdiscussion group] 2017-04-17 13:38:43 0  4  1114

Why are the column names and comments of the query table displayed like this in mysql?

I want to query the column names and comments of the table. The language names are as follows, SELECT column_n...

From [MySQLdiscussion group] 2021-05-30 22:08:49 0  0  1113