MYSQL QUESTIONS

How do I retrieve my MySQL username and password?

it helps some times I lost my MySQL username and password. How do I retrieve it? , Stop the MySQL process.

Date : January 22 2021, 04:47 PM , By : Ronnie Carlin

How do I Concatenate entire result sets in MySQL?

I wish did fix the issue. Maybe you should try including a fourth column, stating the table it came from, and then order and group by it:

TAG : mysql

Date : January 22 2021, 04:45 PM , By : Milander

Create a new Ruby on Rails application using MySQL instead of SQLite

I wish did fix the issue. If you already have a rails project, change the adapter in the config/database.yml file to mysql and make sure you specify a valid username and password, and optionally, a socket:

TAG : mysql

Date : January 22 2021, 02:12 PM , By : user152319

Multiple Updates in MySQL

wish helps you Yes, that's possible - you can use INSERT ... ON DUPLICATE KEY UPDATE.Using your example:

TAG : mysql

Date : January 22 2021, 02:12 PM , By : lili

What do I need to escape when sending a query?

This might help you For maximum security, performance, and correctness use prepared statements. Here's how to do this with lots of examples in different languages, including PHP:https://stackoverflow.com/questions/1973/what-is-the-best-way-to-avoid-s

TAG : mysql

Date : January 22 2021, 02:12 PM , By : Mforg

Joining two foregin keys in the same table references the same primary key

hope this fix your issue Your query is wrong either way. But the reason for getting zeros as result are probably these conditions: b.userId = u.userId and b.userId = f.followed AND f.follower = u.userId.IF b.userId = u.userId and b.userId = f.followe

TAG : mysql

Date : January 12 2021, 09:11 PM , By : user183676

Laravel: Load posts with privacy only to subscriber

To fix the issue you can do You will simply have to make a distinction within the constraints. Because you have a few other constraints, it is necessary to put the OR joined constraints in their own where():

TAG : mysql

Date : January 12 2021, 07:00 PM , By : user184975

mysql one or multiple data bases?

hop of those help? You should stick with one database and one database only unless you have specific reasons to violate that rule. Examples of valid reasons include: You've got a multi-tenant application and the instances of this application do not s

TAG : mysql

Date : January 12 2021, 08:33 AM , By : stan

What is wrong with my mysql foreign key constraints?

like below fixes the issue You probably just need to fix your constraints in table days to use the composite key from reoccurrences:

TAG : mysql

Date : January 12 2021, 08:33 AM , By : jonagh

Joins without foreign key

Hope this helps Yes and no depending on how data gets in to those tables.Yes, if records in the second table will always be created after the first (ie the second tables data is some information that will come later)

TAG : mysql

Date : January 12 2021, 08:33 AM , By : kbrust

Linux web server configuration for AJAX web page highly consumed CPU

help you fix your problem Your environment can be enhanced by the following: Check server's hardware and make sure about the requirements for RAM and CPU. Use Mysqltuner script to tune database engine performance. Check your queries and try to enhanc

TAG : mysql

Date : January 12 2021, 01:40 AM , By : foxthrot

How do I decrease an Integer in MySQL?

I hope this helps . Auto-increment values are not intended to be consecutive. They must be unique, that's all.If you try to decrement the auto-increment value on error, you'll create a race condition in your app. For example:

TAG : mysql

Date : January 12 2021, 01:40 AM , By : OlioEngr

How can I delete the repeated data in MYSQL with over ten million data in it?

will be helpful for those in need You needed a UNIQUE key in the first place. This will add it and dedup:

TAG : mysql

Date : January 12 2021, 01:40 AM , By : user143038

Income and Expense calculation

it should still fix some issue In the future, I'd suggest posting some table details by using SHOW CREATE TABLE table_name which will allow us to better assist you.You should be able to use a union and some grouping to get what you are after:

TAG : mysql

Date : January 11 2021, 05:14 PM , By : kaart

How Can I Optimize My MySQL Select Query?

it should still fix some issue I have a database table that contains over 90,000 rows. , Composite index:

TAG : mysql

Date : January 11 2021, 03:34 PM , By : hammer_1968

How do I avoid invalid data with multiple programs writing to the same database?

help you fix your problem You're talking about race conditions which occur due to sequencing errors.As in you do a fetch, increment, set series of operations:

TAG : mysql

Date : January 11 2021, 03:32 PM , By : dlouzan

I need to covert a timestamps from mysql (2019-08-16T10:36:03.562908+00:00) to 06-08-2019

I wish did fix the issue. If you only need to convert the string, try just slicing the data into the format you want:

TAG : mysql

Date : January 11 2021, 03:32 PM , By : Roel

How to select from two tables and compare the sum from first table if its greater than that in second table?

Does that help First get finalpay for each invoiceid in fees and the join to tblinvoice:

TAG : mysql

Date : January 11 2021, 03:28 PM , By : Jarques

What could be the code for putting existing auto increment id in order?

wish of those help If you are using that id for a relational lookup value in another table, you don't want to do this. Reordering your ids will scramble the relationships.Also, you generally shouldn't be deleting anything from databases. It removes h

TAG : mysql

Date : January 11 2021, 03:26 PM , By : shehan

Mysql Left Join of 3 tables and a one being joined twice

around this issue Not sure if I got the joins/partition right, the foreign keys weren't clear.Even if it's not perfect, hopefully this explains the general theory. Please edit in your correct answer if you end up debugging.

TAG : mysql

Date : January 11 2021, 03:26 PM , By : Icyflash

Mysql - How can I merge two json arrays of strings without duplicates?

With these it helps After too much thinking, and thanks to @lefred. I found a hack that can accomplish this. This is way too hacky, but i will publish it while someone else comes with a better implementation or the mysql guys make a proper function f

TAG : mysql

Date : January 11 2021, 03:26 PM , By : Menno

Custom query in Spring Repository

This might help you 2 selected fields cannot position correctly in an object Cost.It is necessary to select all fields (*) from the table Cost , because the resultset should fit on a List or create a new object for the result with 2 fields: name, sum

TAG : mysql

Date : January 11 2021, 03:26 PM , By : artifex

Mysql inserts in the middle instead at the end of table

hop of those help? Most relational databases will not return the rows in any particular order unless you ask explicitly. They'll just do whatever's easiest. Often that's insertion order, or maybe order on disk, or whatever index was last used. It's r

TAG : mysql

Date : January 11 2021, 02:18 PM , By : S. Fenz

Creating tables and importing data from .sql files in Spring boot

this will help Current apporach: , UPDATEWe can use

TAG : mysql

Date : January 11 2021, 11:39 AM , By : user177837

How to Get Data from Multiple Database Dynamically?

I wish this help you I'm always waiting for upvotes and acknowledgements ;)With this databases (they are all the same of course, so i post only one of them.

TAG : mysql

Date : January 11 2021, 11:39 AM , By : Steve M

MySQL: Will a column-oriented engine be available in MySQL 5.5?

With these it helps You can't just plug a column-based engine into MySQL. The reason for this is that its optimiser only understands row-based engines which support conventional indexes.So the column-based engines (Infobright, infinidb and Kickfire)

TAG : mysql

Date : January 10 2021, 01:57 PM , By : negonicrac

MySQL Full-text Search Workaround for innoDB tables

I wish this help you You might be able to do some kind of data sync using triggers (if your version of mysql supports them). They allow you to run small snippets of SQL at certain points such as after data is inserted into or deleted from a table.For

TAG : mysql

Date : January 10 2021, 01:57 PM , By : Pitmairen

MySQL transaction and trigger

I hope this helps you . And by atomic, you mean if one statement in the trigger fails, the whole statement fails. Yes -- the trigger is done in the context of statement's transaction. And no, of course, if there is no transaction, then there is no tr

TAG : mysql

Date : January 10 2021, 01:49 PM , By : kakashi_

What is an easy way to design MySQL Queries?

Hope this helps A good GUI management system certainly helps. Here's a couple of links to two of my favourites - both of which are available as free editions, but there's no shortage.SQLyog Community Edition. Very straightforward interface which does

TAG : mysql

Date : January 10 2021, 01:49 PM , By : Al Dimond

Remove HTML tags from record

I hope this helps you . try this solution: not tried it myself but apparently it works.source: http://forums.mysql.com/read.php?52,177343,177985msg-177985

TAG : mysql

Date : January 10 2021, 01:47 PM , By : James Lupiani

Alternative to Intersect in MySQL

I wish did fix the issue. Microsoft SQL Server's INTERSECT "returns any distinct values that are returned by both the query on the left and right sides of the INTERSECT operand" This is different from a standard INNER JOIN or WHERE EXISTS query.SQL S

TAG : mysql

Date : January 10 2021, 01:45 PM , By : Cosmin

Insert a bunch of duplicate rows into a mysql table

will be helpful for those in need I need to insert 50 rows into a mysql table. They should all be exactly identical, besides the primary key. , Just use while loop:

TAG : mysql

Date : January 10 2021, 01:45 PM , By : ArdentRogue

Explain this SQL query in plain English

it should still fix some issue I'm assuming you're asking what does that query do in plain English:

TAG : mysql

Date : January 10 2021, 01:45 PM , By : orlandoferrer

Need an alternative to two left joins

should help you out You use a LEFT JOIN when you want data back regardless. In this case, if the creator is offline, getting no rows back would be a good indication - so remove the LEFT joins and just do regular joins.

TAG : mysql

Date : January 10 2021, 01:45 PM , By : Gianluca Riccardi

Wordpress Access WP-Admin when installed in a sub directory

this will help I have just taken over managing a website for a client from their previous developer. I have been given a copy of all the files and the database. , Have you tried adding the following to your config.php

TAG : mysql

Date : January 09 2021, 02:14 PM , By : Robin Buitenhuis

How to query fields with MySQL-Regex that contain thousand separator?

wish of those help MySQL doesn't support the \d regex capture group. You have to replace with one of the following: [0-9] [[:digit:]]

TAG : mysql

Date : January 09 2021, 02:14 PM , By : Umang

TomEE JPA MySql Configuration "An invalid Lifecycle transition was attempted"

it fixes the issue Finally I solved, to be very clear: in Udemy course was used Tomcat v8.0 Server (apache-tomee-7.0.4) instead I was using Tomcat v9.0 Server (apache-tomee-8.0.0-M3-plume)Now with old version is not necessary, but with tomee-8.0.0 it

TAG : mysql

Date : January 09 2021, 05:38 AM , By : francisco santos

Update a row with data from another row in the same table based on a similar field

it fixes the issue I am using wordpress and I want to copy data from a custom field to another custom field. , You can use join when updating data

TAG : mysql

Date : January 09 2021, 05:38 AM , By : Rik

SequelizeConnectionRefusedError: connect ECONNREFUSED 127.0.0.1:3306

may help you . I'm using Sequelize as an ORM to my node js app and Mysql database , after following some tutorials i m adding this code to connect mysql to the node but after taping npm start i m getting this error : Unable to connect to the database

TAG : mysql

Date : January 09 2021, 05:38 AM , By : Cowtung

Getting ER_PARSE_ERROR when using Intersect and multiple input vaules of email format

will help you there is not INTERSECT in mysql .. if you really need an intersect you could use several inner join

TAG : mysql

Date : January 08 2021, 03:18 AM , By : rhyhann

Laravel get many objects in one object

Any of those help Here you've to make three tables products -> Product.php(Model name) id name descriptions created_at updated_at colors -> Color.php(Model name) id product_id color_name created_at updated_at

TAG : mysql

Date : January 08 2021, 03:18 AM , By : msugar

MySql: How do I sort a query by 2 specific categories and then by price?

With these it helps I have this table prices. Column categoy is type enum ['owner','tax','fees','misc']. , You could try with CASE WHEN method

TAG : mysql

Date : January 07 2021, 03:08 PM , By : Simon Capewell

Generating monthly report mysql

wish help you to fix your issue As long as there is an entry every day, this query should give you the data for each day for the last 30:

TAG : mysql

Date : January 07 2021, 03:08 PM , By : mckasty

getting error in Sql Query incorrect syntax near ')'

I wish this help you I getting the error when I execute this query , Your CASE needs an END

TAG : mysql

Date : January 07 2021, 03:08 PM , By : Mariocki

MariaDB/MySQL select query replace json array of ids into concatenated values

Hope that helps I'm not too familiar with database queries, but I would like to do the following: in a table, I have stored a column of tag ids like: [1,6,8] and I wish to return "Music, Dance, Pop" for example in my select query. , and I'm not allow

TAG : mysql

Date : January 07 2021, 07:50 AM , By : besn

How to create a MySQL Query to get sales for each date of month (Like Calendar)?

I wish this help you I have three tables: Product, Invoice and Invoice_Detail , You can use conditional aggregation:

TAG : mysql

Date : January 07 2021, 07:50 AM , By : MJRider

Insert query fails with error duplicate entry , where as select query returns null

Hope this helps If there is no output for select, then how is duplication happening here. In a select if a value in a column null then use the default value. The second null row produces a duplicated value

TAG : mysql

Date : January 07 2021, 07:50 AM , By : Hadley

MySQL - ORDER BY multiple words, then alphabetically?

Any of those help You can just expand your CASE expression with each of the desired words:

TAG : mysql

Date : January 07 2021, 07:50 AM , By : Nandor Devai

With a one-to-many relation, how do you get every row of table A if table B doesn't reference some rows of A?

With these it helps Try using a left join, which will prevent removing any blogs which happen to have no tags.

TAG : mysql

Date : January 07 2021, 07:50 AM , By : AnthonyC

How to add temporary column with data with MYSQL?

it fixes the issue This query should give you the results you want. For each user in the users table, it gives you id, name and whether they are friends with (in this example) user 4 (this being the value you would pass as a parameter to the query):

TAG : mysql

Date : January 06 2021, 03:17 PM , By : Alpinfish

Why is subquery join much faster than direct join

help you fix your problem The problem with your long-running queries, is that you lack an index on the page_id column of the comments table. Hence, for each row from the pages table, you need to check all rows of the comments table. Since you are usi

TAG : mysql

Date : January 06 2021, 03:27 AM , By : sadboy

Under standing Update Queries, and how many sets one query can have

I think the issue was by ths following , You're probably better off just writing separate UPDATE queries for each one; with the syntax you are envisioning you're only an "UPDATE table" away already.... but if you're in one of those odd situations whe

TAG : mysql

Date : January 06 2021, 03:27 AM , By : Anna

How to select multiple values in a subquery but have each value assigned to matching parent select value?

this one helps. What you're trying to do is a kind of pivot, so you can do it without the correlated subqueries.

TAG : mysql

Date : January 06 2021, 03:27 AM , By : Kbotei

SQL getting a column to match multiple conditions in CASE

may help you . In this case, the solution was not necessary to be done with a single query where the processing was done on SQL side. I opted for a broader query that got all the data at one shot, then processed the result set with PHP to get to the

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Date : January 05 2021, 11:29 AM , By : Jim F.

Converting date operation from MySQL to PostgreSQL

should help you out The MySQL query seems to calculate the difference between two dates and divides the result by 7. Expecting, that you want to calculate the number of weeks between two dates. But with negative sign, because you are subtracting the

TAG : mysql

Date : January 03 2021, 08:18 AM , By : WuJanJai

MySQL - Join these subqueries into a single query

Any of those help Since item id makes no sense in a query which contains an aggregate function(group_concat) over the entire set and will return a non determinate value I have dropped it. You can use case statement in group_concat

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Date : January 02 2021, 10:54 PM , By : ianium

Show the list of all product's names ordered along with first and last names of the customers

will help you Looks like you're pretty close. You just need a WHERE clause to match this requirement:

TAG : mysql

Date : January 02 2021, 10:54 PM , By : Gabe

Mysql `OR` condition doesn't work with JOIN

it fixes the issue The default join type is INNER. This requires that the record is found in both tables (e.g. that the user is found in eventParticipant). You need the record to be found in one of the tables. For this, you need an OUTER JOIN (you ca

TAG : mysql

Date : January 02 2021, 10:54 PM , By : James Lupiani

how can I hide the data that my controller returns making a CRUD in Laravel & vue.js?

I think the issue was by ths following , If the Tasks model has multiple users' data you should be restricting the tasks route to return only the current logged in user's data. This is the same whether its accessed via Ajax or directly in the browser

TAG : mysql

Date : January 02 2021, 06:48 AM , By : Saurabh

Sum of values for all accounts using the most recent date for each

To fix this issue there are multiple ways of doing it, my preferable way is to do self-join, like this:

TAG : mysql

Date : January 02 2021, 06:48 AM , By : user161314