Recent questions tagged MySQL

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mysql - Remove duplicates in list of object with Python

I've got a list of objects and I've got a db table full of records. My list of objects has a title ... to check for differences in the titles. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mysql error: Table "mysql"."innodb_table_stats" not found

I'm getting the following error in mysql 5.6 community edition: : Error: Table "mysql"."innodb_table_stats" not found ... do I fix this error? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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624 views

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mysql - Calculating time difference between 2 dates in minutes

I have a field of time Timestamp in my MySQL database which is mapped to a DATE datatype in my bean. Now I want ... any way to do this in SQL? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mysql - Context manager for Python's MySQLdb

I am used to (spoiled by?) python's SQLite interface to deal with SQL databases. One nice feature in python ... 't offer a complete solution. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mysql - Fetching a Single Row from Join Table

Here are my tables: CREATE TABLE `articles` ( `id` int(10) unsigned not null auto_increment, `author_id` int( ... a minute or more to complete. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mysql - What happens when I exhaust a bigint generated key? How to handle it?

I can't imagine for myself a good answer for this, so I thought of asking it here. In my mind, I'm ... the right way? Any insights friends. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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442 views

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mysql - How to estimate SQL query timing?

I'm trying to get an rough (order-of-magnitude) estimate of how long time the following query could take: mysql> ... set (0.00 sec) mysql> See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mysql - uninitialized constant MysqlCompat::MysqlRes (using mms2r gem)

moved a rails app of mine onto a new server and had to install a few gem dependencies. However, after installing ... running mysql 2.8.1 gem. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mysql - INSERT INTO Table from multiple tables

Hey so I have a Junction table linking two unrelated tables. Both the tables have ID's. I need to select the ID ... , in this case they don't. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mysql - Install mysqlclient for Django Python on Mac OS X Sierra

I have already installed Python 2.7.13 Django 1.11 MySQL 5.7.17 I want use MySQL with Django, ... /T/pip-build-f51KhW/mysqlclient/ See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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520 views

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mysql - Is EXISTS more efficient than COUNT(*)>0?

I'm using MySQL 5.1, and I have a query that's roughly of the form: select count(*) from mytable where a = ... and I don't need an exact count? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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578 views

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mysql - utf8_bin vs. utf_unicode_ci

My table Website Website_Name//column name Google Facebook Twitter Orkut Frype Skype Yahoo Wikipedia I i use ... upon the following queries See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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646 views

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mysql - How add unique key to existing table (with non uniques rows)

I want to add complex unique key to existing table. Key contains from 4 fields (user_id, game_id, date, time) ... using only a MySQL query? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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478 views

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mysql - Sum values of a single row?

I have a MySQL query that returns a single row that is a series of 1s and 0s. It's for a progress bar ... item_1 ... ) AS alias Correct? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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605 views

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mysql - DELETE FROM `table` AS `alias` ... WHERE `alias`.`column` ... why syntax error?

I tried this with MySQL: DELETE FROM `contact_hostcommands_relation` AS `ContactHostCommand` WHERE (`ContactHostCommand` ... MySQL specific? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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624 views

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mysql - Counting associated entries with Sequelize

I have two tables, locations and sensors. Each entry in sensors has a foreign key pointing to locations. Using ... }); return Sensor; }; See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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946 views

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mysql - php artisan migrate throwing [PDO Exception] Could not find driver - Using Laravel

I have a bad experience while installing laravel. However, I was able to do so and move to the next level. I used ... , MAMP PRO with php 5.4.4 See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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458 views

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mysql - GROUP BY - do not group NULL

I'm trying to figure out a way to return results by using the group by function. GROUP BY is working as expected, but ... ....but I want all 5. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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509 views

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mysql - How can I see the specific value of the sql_mode?

There are some sql_mode values in MySQL: ANSI, IGNORE_SPACE, STRICT_TRANS_TABLES, etc How can I see the one particular ... as a column name. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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960 views

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mysql - WampServer - mysqld.exe can't start because MSVCR120.dll is missing

I've tried to run wampserver on my local side, but mysql server doesn't run. when I try to install service, ... home OS vmware Any help for me? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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629 views

1 answer

mysql - SQL DELETE with INNER JOIN

There are 2 tables, spawnlist and npc, and I need to delete data from spawnlsit. npc_templateid = n.idTemplate is the ... (n.type = "monster"); See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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509 views

1 answer

mysql - Updating entry WITHOUT updating timestamp

I have a timestamp in a mysql table with attribute "ON UPDATE CURRENT_TIMESTAMP". Is there a way to manually disable ... but not to re-date it) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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451 views

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mysql - Rails 3 query on condition of an association's count

In Rails 3 with mysql, suppose I have two models, Customers and Purchases, obviously purchase belongs_to ... elegant framework of rails. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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622 views

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mysql - execute *.sql file with python MySQLdb

How can execute sql script stored in *.sql file using MySQLdb python driver. I was trying cursor.execute(file( ... but also with no success. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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432 views

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mysql - Replacing with PHP

I have a post form, which inserts my text in a MySQL database. I use $post_text = mysql_real_escape_string(htmlspecialchars ... can I fix this? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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885 views

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mysql - ERROR 1115 (42000): Unknown character set: 'utf8mb4'

I have a MySQL dump, which I tried to restore with: mysql -u"username" -p"password" --host="127.0.0.1" ... .69. How can I solve this error? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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455 views

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mysql - Sorting a subtree in a closure table hierarchical-data structure

I would like to ask you to help me with the problem with sorting of the hierarchical data structure stored as ... to generate and change them. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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755 views

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mysql - How to select domain name from email address

I have email addresses like [email protected], [email protected] [email protected] ... etc. I want a Mysql SELECT ... gmail,ymail,hotmail, etc. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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